DC2024A - High Current Hot Swap Controller with I2C Compatible … · 2018. 3. 19. · High Current...

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DEMO MANUAL DC2024A

Description

LTC4282 High Current Hot Swap Controller

with I2C Compatible Monitoring

Demonstration circuit 2024A features the LTC®4282 high current Hot Swap controller. The LTC4282 is well suited to high power applications because the precise monitor-ing capability and accurate current limiting reduces the extremes in which both loads and power supplies must safely operate. Non-volatile configuration allows for flex-ibility in the autonomous generation of alerts and response to faults. The LTC4282 provides a rich set of features to support Hot Swap applications including: n 12-/16-Bit ADC Monitors Current, Voltage, Power and

Energy n Controls Two Sets of Parallel MOSFETs for High Current

Applications n I2C/SMBus Interface

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and LTpowerPlay is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners.

n Non-Volatile Configuration and Logging Functions n Generates Alerts on ADC Measurements Outside Limits n Software Adjustable Current Limit with Foldback n Three General Purpose Input/Outputs

Available in a 32-pin 5mm × 5mm QFN package, the LTC4282 is showcased on DC2024A configured for a 12V/100A application. The DC2024A-B has an included programming socket to allow programming an LTC4282 for prototyping purposes prior to its permanent installation on a PCB. The DC2024A-A does not have this socket. By changing a few passive components, 2.9V to 30V applica-tions can easily be evaluated.

Design files for this circuit board are available at http://www.linear.com/demo/DC2024A

Figure 1. Proper Measurement Equipment Setup

Test Loads

Variable Power Supply

A

V V

http://www.linear.com/LTC4282

http://www.linear.com/demo/DC2024A

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DEMO MANUAL DC2024A

Quick start proceDure

performance summary Specifications are at TA = 25°C

PARAMETER CONDITIONS VALUE

Input Supply Voltage Range 2.9V to 30V

Nominal Operating Voltage 12.0V

Overvoltage Lockout Nominal 15.0V

Undervoltage Lockout Nominal 11.1V

Output Current Limit Nominal 100A

Maximum Load Capacitance Nominal 10,000µF

Timer Expiration Period Nominal 4ms

Table. Power Input and Output ConnectionsNOMENCLATURE CONNECTOR DESCRIPTION

12VIN E1 12V Power In

12VOUT 100A E2 12V Power Out

GND E21 (Banana) Power Supply Common

Table 2. Test Points, TurretsNOMENCLATURE TURRET DESCRIPTION

GPIO1 E3 GPIO1 Pin I/O

VCC E4 Internal VCC

12VOUT E5 12VOUT Monitor

12VIN E6 12VIN Monitor

ON (SHORT PIN) E7 ON Pin Monitor/Input

SCL E8 I2C Serial Clock Input

GND E9, E10, E15, E17 Ground

SDA E11 I2C Serial Data Input/Output

ALERT E12 ALERT Pin



EXT 5V E16

TIMER E18 TIMER Pin

UV E19 UV Pin

OV E20 OV Pin

GATE2 E22 GATE 2 Pin

GATE1 E23 GATE 1 Pin

Table 3. LED IndicatorsNOMENCLATURE LED DESCRIPTION

IN D1 (Green) Input Power Indicator

OUT D2 (Green) Output Power Indicator

GPIO1 D3 (Green) GPIO1 Logic Low Indicator

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DEMO MANUAL DC2024A


Table 4. JumpersNOMENCLATURE JUMPER DESCRIPTION

CLK: INT, EXT JP1 Internal/External Clock Select

ON: INTVCC, FLOAT, GND JP2 ON Input Select, VCC, Float (External), GND

ADR0: H, NC, L JP3 Address Pin ADRO Select

ADR1: H, NC, L JP4 Address Pin ADR1 Select

ADR2: H, NC, L JP5 Address Pin ADR2 Select

WRITE PROTECT: LOCK, WRITE JP6 Write Protect for EEPROM

Operating Principles

The LTC4282 is a low voltage, high current Hot Swap controller that has a 2.9V to 33V operating range and a 45V absolute maximum voltage for the VDD pin. This demo circuit is populated for 12V operation, but it can easily be readjusted for any voltage between 2.9V and 30V by replacing R1, R2, and R7 (top resistors in the UV/OV divider and the FB divider). The DC2024A as supplied by the factory is populated with a pair of PSMN1R5-30BLE MOSFETs in D2PAK packages. A total of ten 3mΩ sense resistors are used providing typically 100A of load cur-rent. The current limit and circuit breaker thresholds can be adjusted by changing the sense resistors R25, R30, R35, R41, R47, R52, R57, R62, R67, and R72 and/or the value of ∆VSENSE via addressable registers in the LTC4282. Several locations for MOSFET packages as well as additional sense resistors are available on the front and rear of the PCB for higher current configurations.

Quick Start Procedure (Without Software)

DC2024A is easy to set up to evaluate the performance of the LTC4282. Refer to Figure 1 for proper measurement equipment setup and follow the procedure below.

WARNING

The DC2024A is capable of operation in excess of 100A. At this current and power level, there is a danger of seri-ous personal injury and equipment damage if proper techniques are not used. All cabling between the power supply and the load should be capable of handling the current levels used.

Additionally, the high currents and fast transients can cause unexpected voltage drops in cables connecting the test equipment to the DC2024A due to parasitic resistance and inductance. The cable drops may cause ground loops for the current via various cables and scope probes. This will cause unexplained ringing, distorted oscilloscope waveforms, voltage and current spikes, and signals ap-pearing to be below ground.

Table 5. ConectorsNOMENCLATURE CONNECTOR DESCRIPTION

DC590 J1 Connection for DC590 Aux Demo Board

DC1613 J2 Connection for DC1613 Aux Demo Board

Table 3. LED IndicatorsSOCKET POWER ON D4 (Red) Programming Socket SKT1 Powered

ALERT D5 (Red) ALERT Pin Logic Low

SCL D6 (Green) Serial Clock Active

SDA D7 (Green) Serial Data Active

GPIO3 D8 (Green) GPIO3 Logic Low

GPIO2 D9 (Green) GPIO2 Logic Low

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DEMO MANUAL DC2024A

Quick start proceDureA common sneak path for current is the third wire grounds used on power cords of test equipment in use. Using ground lifting connectors at the wall outlet won’t necessarily alleviate these effects since most equipment has line bypassing capacitors between the mains voltage and local chassis ground. Isolating test equipment using line isolation transformers with low primary to secondary capacitance is recommended. Probe ground leads may intercept induced fields from the high current paths and should be minimized or avoided

Another method to remove these artifacts is the use of a differential scope probe connected between the signal to be observed and a ground connection located close to the point of measurement.

Also be careful to not allow an open ground from the power supply or load to cause return current through the grounds of the various devices connected to the demo board. This may present a fire hazard or cause damage to the test equipment.

The DC2024A is set up to operate in a 12V system at current levels up to 100A. At 100A, the MOSFETs are dissipating 3.75W each and additional air flow may be needed to keep them within safe thermal operating limits for continuous operation. If additional current is required without sufficient air flow, multiple MOSFETs should be connected in parallel with the existing MOSFETs to lower the I2R losses.

Jumper Positions

JUMPER NAME POSITION

JP1 CLK EXT

JP2 ON INTVCC

JP3 ADR0 NC

JP4 ADR1 NC

JP5 ADR2 NC

JP6 WRITE PROTECT LOCK

Powering Up

Connect power supply capable of 120A at 0V to 20V to the 12V input as shown in Figure 1. Verify cabling shown in extra bold lines is capable of carrying 100A safely. The GND connection does not handle high current so no high current cabling is required.

Generally, an electronic load will be used. If this is true, use it in the constant resistance mode. Use in constant current will prevent start up because of current foldback in the LTC4282. Current foldback is used to minimize dissipation in the MOSFETs used as pass devices with the LTC4282. To effect this, current is initially limited to approximately 1/3 of full limit until the output voltage is above 10V. If a constant current load is used and set to 100A, the LTC4282 will not start up and a current fault will be reported.

UV/OV Thresholds

With no load on the output, slowly increase the voltage on the input to the board. Observe the input voltage when LED D2 (OUT) illuminates. This voltage should be between 10.7V and 11.4V. Continue increasing the voltage until D2 is extinguished. This should occur between 14.4V and 15.3V.

Output Voltage Slew Rate

With no load connected, observe the output voltage between turret 12VOUT (E5), and GND. Apply 12V to the 12VIN connector. The output voltage should slew from 0V to 12V in 10ms to 25ms.

Output Current Limit

Turn off power supply and connect electronic load to the DC2024 as shown in Figure 1. Disable electronic load. Adjust power supply to 12V and verify its current level is set to >120A.

Slowly increase conductance of the electronic load while monitoring current. As the load increases to around 100A, the output voltage and current will fall to zero. Note the current where this occurs. This should be 95A to 105A.

Ability to Charge Output Capacitor

Turn off power supply and disconnect electronic load. Replace load with a 10,000µF capacitor rated at 15V or greater. Turn on power supply and observe that the output voltage rises to 12V indicating the DC2024 has connected to the load and successfully charged the output capacitance. Monitor the current during the period when the capacitor is charging, it should be a maximum of 12A.

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DEMO MANUAL DC2024A

Quick start proceDureSoftware Control with LTpowerPlay™

LTpowerPlay is a convenient PC software GUI that gives complete access to the registers of the LTC4282, and many other Linear Technology power system management parts. Use it in offline mode to build a system configura-tion file even with no hardware plugged-in, and use it with hardware connected to configure and debug your application. LTpowerPlay communicates using the I2C bus in the demo system (covered in this manual), or in your real-world product environment. It provides unprecedented control over the Linear Technology ICs on the I2C bus.

Use it during board bring-up to tune and optimize the power system parameters. Use it during system debug to view critical system information and troubleshoot board design or manufacturing issues. LTpowerPlay includes extensive help and documentation under the help menu. Online help includes quick start videos and tutorials, and detailed technical documentation from the Linear Tech-nology website. Getting started with LTpowerPlay is easy. Simply download and install the PC software from here:

http//www.linear.com/ltpowerplay

Figure 2. DC2024A-A Demo Board Connected to DC1613 I2C-to-USB Converter

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DEMO MANUAL DC2024A

Quick start proceDureThe DC1613 USB-to-I2C adapter interfaces the PC running LTpowerPlay to the DC2024A board. Connect the DC1613 adapter to the PC through a USB cable, and connect the DC2024A board through the ribbon cable to connector J2.

Launch the LTpowerPlay GUI on the PC. The software identifies the DC1613 controller, then the DC2024A board, and begins communicating through the I2C bus with the LTC4282. Once this communication has been established, the GUI displays its main window (Figure 3).

The LTpowerPlay GUI divides information into separate panes in the window. On the left is the system tree pane (Figure 4), displaying a list of all Linear Technology devices identified on the I2C bus. For a single LTC4282 device, the tree is small, but if other supported devices are pres-ent on the I2C bus, LTpowerPlay will add them. Click on a device in this list to selectively access it. Information in other panes pertains to the selected device.

LTpowerPlay System Tree

Figure 3. LTpowerPlay GUI Window

Figure 4. LTpowerPlay System Tree

To the right of the system tree is the configuration register pane. The Figure 5 view shows all of the writable user-configurable registers available on the selected device. The GUI offers clickable buttons and fields to edit the information in these registers.

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DEMO MANUAL DC2024A


Update register contents by clicking or typing to change the desired registers. Then selecting the PC to RAM button in the top toolbar (Figure 6). LTpowerPlay writes changes to the updated registers.

Figure 5. LTpowerPlay Configuration Registers

Right of center in LTpowerPlay is the telemetry pane (Figure 7), displaying read-only information contained in the status registers of the selected part. The GUI periodi-cally polls the I2C bus and updates the telemetry content, along with a user-friendly interpretation of the bits.

Figure 6. PC to RAM Button

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DEMO MANUAL DC2024A


Figure 7. LTpowerPlay Telemetry

In the upper right corner of LTpowerPlay is the chip dash-board pane (Figure 8), displaying a graphical representation of the part status in a friendly, easy-to-understand format. The meter in the upper left of the panel displays the static input energy to the card in watts. The small dials in the center of the input energy meter display the energy used in kilojoules. The VSOURCE meter displays the voltage at the SOURCE pin of the LTC4282, which is the same as VOUT. The Input meter displays the voltage input at the VDD pin of the LTC4282. VSENSE indicates the input current derived by dividing the voltage measured across the sense resistor by the value of the sense resistor. The power meter displays the SOURCE voltage multiplied

by the current sense voltage and scaled to indicate the power in watts. VGPIO3 displays the voltage at GPIO3 when it is configured as an analog input. The FET Status annunciators show the status of the pass MOSFETs as described in the FET-BAD Fault section of the data sheet. GPIO1, GPIO2 and GPIO3 show the status of the general purpose input/output pins.

On the lower right of the GUI window is the telemetry plot pane (Figure 9). By selecting various measurement functions in the telemetry pane, a graphic display of that function versus time is displayed. This gives an instant indication on how that function varies with time.

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DEMO MANUAL DC2024A


Figure 8. LTpowerPlay Chip Dashboard

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DEMO MANUAL DC2024A


Figure 9. LTpowerPlay Telemetry Plot

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DEMO MANUAL DC2024A


Figure 10. LTC4282 RAM and Non-Volatile Memory

RAM

LTC4282 CHIP

COMPUTER WITHLTpowerPlay

STORE

RESTORE

LTC4282LOGIC

EEPROMI2CBUS

Figure 11. Read Write NVM Buttons on Toolbar

The LTC4282 is highly configurable through its register set. Refer to the LTC4282 data sheet for a complete discussion of the registers and functions available. Get immediate access to detailed help for the selected register in LTpowerPlay by pressing the F1 key on your keyboard.

The LTC4282 features non-volatile EEPROM that holds device configuration information and a snapshot of past fault information. When the part receives power it executes a power-on reset, and restores the contents of the EEPROM to its operating RAM. Following this power-on restore, op-erating RAM can be modified with I2C bus commands that modify the part behavior. These modifications are effected by using the PC>RAM button in the toolbar. Also included in the toolbar are buttons for reading the internal RAM data on the PC by using the RAM>PC button on the tool bar. Similarly, there are buttons for moving the contents of the RAM to the NVM (EEPROM) and vice versa using the RAM>NVM and NVM>RAM buttons on the toolbar.

Programming Socket

The DC2024A-B board includes a programming socket. This socket in conjunction with the LTpowerPlay software GUI and DC1613 USB-to-I2C adapter may be used to program the EEPROM of multiple LTC4282 ICs prior to their installation on a PC board.

Please refer to Application Note 145, http://cds.linear.com/docs/en/application-note/AN145f.pdf, and refer to Option 1A. Use the device address 0x88, which is the address to which the programming socket is hard wired. Also verify that the LTC4282 already soldered on the board (U1) is set to a different address than 0x88 to prevent a conflict.

Follow the instructions for Option 1A on page 3 of Application Note 145.

http://cds.linear.com/docs/en/application-note/AN145f.pdf

http://cds.linear.com/docs/en/application-note/AN145f.pdf

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DEMO MANUAL DC2024A

parts ListITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

1 2 C1, C8 CAP., POLARIZED, OPTION NICHICON, UVR1E102MPD OR EQUIVALENT

2 2 C2, C3 CAP., 33pF, X7R, 16V, 5%, 0603 AVX, 0603YC330JAT2A

3 1 C4 CAP., OPTION, 0603 N/A

4 2 C5, C14 CAP., 0.1µF, X7R, 16V,10%, 0603 AVX, 0603YC104KAT2A

5 1 C6 CAP., 1µF, X7R, 16V, 10%, 0603 AVX, 0603YC105KAT2A

6 1 C7 CAP., 0.47µF, X7R, 16V, 10%, 0603 TDK, C1608X7R1C474K

7 2 C9, C10 CAP., 0.01µF, X7R, 50V, 10%, 0603 AVX, 06035C103KAT2A

8 2 C11, C12 CAP., 0.022µF, X7R, 50V, 5%, 0805 KEMET, C0805C223J5RACTU

9 1 C13 CAP., 0.1µF, X7R, 25V, 20%, 0603 TDK, C1608X7R1E104M080AA

10 7 D1-D3, D6-D9 LED, GREEN, WATERCLEAR, 0805 WURTH, 150080GS75000

11 2 D4, D5 LED, RED, WATERCLEAR, 0805 WURTH, 150080RS75000

12 4 D10-D12, D15 DIODE, TVS, 28V, SMC DIODES INC./ ZETEX, SMCJ28A-13

13 0 D13, D14 NO STUFF NO STUFF

14 2 E1, E2 ONE-HOLE, OFFSET FLOATING TONGUE LUG PANDUIT, CB175-38-QY

15 20 E3-E20, E22, E23 TEST POINT, TURRET, .064 MTG. HOLE, .125" THICK PCB

MILL-MAX, 2308-4-00-80-00-00-07-0

16 1 E21 BANANA JACK, NON-INSULATED KEYSTONE, 575-4

17 1 J1 CONN., HEADER, 2×7, 2mm, SHROUDED, THRU-HOLE, VERTICAL

MOLEX, 87831-1420

18 1 J2 CONN., HEADER, 12 POS 2mm FCI, 98414-G06-12ULF

19 2 JP1, JP6 CONN., HEADER, 1×3, 2mm, THRU-HOLE, VERTICAL

SAMTEC, TMM-103-02-L-S

20 4 JP2-JP5 CONN., HEADER, 1×4, 2mm, THRU-HOLE, VERTICAL

SAMTEC, TMM-104-02-L-S

21 4 MP1-MP4 BUMPER, RECESSED, #4 SCREW, BLACK KEYSTONE, 727

22 4 MP5-MP8 WASHER, FLAT, SS 18-8, #4 BOLT DEPOT, 5563

23 4 MP9-MP12 MACHINE SCREW, #4-40 × 1/2 PHILLIPS PAN HEAD, ZINC

BOLT DEPOT, 7593

24 4 MP13-MP16 LOCK WASHER, INT. TOOTH, ZINC, #4 BOLT DEPOT, 3011

25 4 MP17-MP20 HEX NUT, #4-40, SS 18-8 BOLT DEPOT, 4115

26 2 MP21, MP22 HEX NUT, FULL, 3/8-16, 9/16 IN. GRAINGER, 1WB27

27 2 MP23, MP25 FLAT WASHER, SS 18-8, 3/8 IN. GRAINGER, 6FDG6

28 2 MP26, MP27 LOCK WASHER, INT., 0.398 IN. ID GRAINGER, 2DE18

29 2 MP28, MP29 HEX HEAD BOLT, 3/8-16 × 1-1/8 IN. GRAINGER, 30Z861

30 2 Q1, Q2 TRANSISTOR, MOSFET, D2PAK NXP, PSMN1R5-30BLE,118

31 3 Q3-Q5 TRANS., MOSFET N-CH., 60V SOT-23 VISHAY SILICONIX, 2N7002K-T1-GE3

32 0 Q6, Q7 NO STUFF NO STUFF

33 0 Q8, Q10, Q13, Q15 NO STUFF NO STUFF

34 0 Q9, Q11, Q12, Q14 NO STUFF NO STUFF

35 1 R1 RES., 34.8k, 1/10W, 1%, 0603 YAGEO, RC0603FR-0734K8L



38 5 R4-R6, R17, R18 RES., 10k, 1/4W, 5%, 1206 PANASONIC, ERJ-8GEYJ103V

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DEMO MANUAL DC2024A

parts ListITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER


40 4 R8, R10, R11, R21 RES., 3.01k, 1/10W, 1%, 0603 YAGEO, RC0603FR-073K01L

41 3 R9, R19, R20 RES., OPTION, 0603 N/A

42 4 R12-R14, R22 RES., 5.11k, 1/10W, 1%, 0603 YAGEO, RC0603FR-075K11L

43 11 R15, R16, R135, R140-R142, R151-R155

RES., 0Ω, 1/10W, 0603 YAGEO, RC0603JR-070RL

44 40 R23, R24, R26-R29, R31-R34, R36-R39, R42-R44, R46, R48-R51, R53-R56, R58-R61, R63-R66, R68-R71, R74, R75

RES., 1Ω, 1/16W, 1%, 0402 VISHAY, CRCW04021R00FKED

45 10 R25, R30, R35, R41, R47, R52, R57, R62, R67, R72

RES., 0.003Ω, METAL ELEMENT, 1%, 2W 2512

OPTEK TECHNOLOGY (TT ELECTRONICS), LRMAT2512-R003FT4

46 10 R40, R73, R143-R150 RES., 10Ω, 1/10W, 5%, 0603 YAGEO, RC0603JR-0710RL

47 2 R45, R76 RES., 59k, 1/10W, 1%, 0603 VISHAY DALE, CRCW060359K0FKEA

48 0 R77, R78, R80-R83, R85-R88, R90-R95, R97-R100, R102, R103, R105-R108, R110-R113, R115-R120, R122-R125, R127-R130, R132, R133

NO STUFF NO STUFF

49 0 R79, R84, R89, R96, R101, R109, R114, R121, R126, R131

NO STUFF NO STUFF

50 0 R104, R134 NO STUFF NO STUFF

51 1 R136 RES., 2k, 1/10W, 1%, 0603 YAGEO, RC0603FR-072KL

52 0 R137-R139 NO STUFF NO STUFF

53 0 SKT1 NO STUFF -A, SOCKET -B PLASTRONICS, 32QN50515050-E

54 0 TP1-TP8 NO STUFF NO STUFF

55 1 U1 IC, HI-CURRENT HOT SWAP CONTROLLER, QFN

LINEAR TECH., LTC4282CUH#PBF

56 1 U2 IC, SERIAL EEPROM, 2k BIT, 400kHz, TSSOP-8

MICROCHIP TECH., 24LC025-I/ST

57 6 XJP4-XJP6, XJP10-XJP12 SHUNT, 2mm SAMTEC, 2SN-BK-G

58 1 Y1 CRYSTAL, 4MHz, SMT ABRACON, ABLS-4.000MHZ-B4-T

59 0 Y2 NO STUFF NO STUFF

60 3 Z1-Z3 DIODE, ZENER 5.1V 500mW SOD-123 FAIRCHILD, MMSZ5231B

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DEMO MANUAL DC2024A

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EV

05

Frid

ay, M

ay 2

2, 2

015

DC

2024

A-A

LTC4

282IU

H

DATE

:

IC N

O.

SHEE

TOF

TITL

E: D

EMO

CIRC

UIT

SCHE

MAT

IC,

APPR

OVAL

SPC

B DE

S.

APP

ENG.

Fax:

(408

)434

-050

7

Milp

itas,

CA 95

035

Phon

e: (4

08)4

32-1

900

1630

McC

arth

y Blvd

.

LTC

Conf

iden

tial-F

or C

usto

mer

Use

Onl

y

CUST

OMER

NOT

ICE

LINE

AR T

ECHN

OLOG

Y HA

S MA

DE A

BES

T EF

FORT

TO

DESI

GN A

CIRC

UIT

THAT

MEE

TS C

USTO

MER-

SUPP

LIED

SPE

CIFI

CATI

ONS;

HOW

EVER

, IT R

EMAI

NS T

HE C

USTO

MER'

S RE

SPON

SIBI

LITY

TO

VERI

FY P

ROPE

R AN

D RE

LIAB

LE O

PERA

TION

IN T

HE A

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LAP

PLIC

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D PR

INTE

DCI

RCUI

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ARD

LAYO

UT M

AY S

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FICA

NTLY

AFF

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CIRC

UIT

PERF

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OR R

ELIA

BILI

TY. C

ONTA

CT L

INEA

RTE

CHNO

LOGY

APP

LICA

TION

S EN

GINE

ERIN

G FO

R AS

SIST

ANCE

.

THIS

CIR

CUIT

IS P

ROPR

IETA

RY T

O LI

NEAR

TEC

HNOL

OGY

AND

SUPP

LIED

FOR

USE

WIT

H LI

NEAR

TEC

HNOL

OGY

PART

S.SC

ALE

= NO

NE

www.

linea

r.com

SIZE

:

SKU

NO.

SCHE

MAT

IC N

O. A

ND R

EVIS

ION: 1

5

N/A

M.HA

WKI

NS

BOB

SMIT

H

710-

DC

2024

A R

EV

05

Frid

ay, M

ay 2

2, 2

015

DC

2024

A-A

LTC4

282IU

H

DATE

:

IC N

O.

SHEE

TOF

TITL

E: D

EMO

CIRC

UIT

SCHE

MAT

IC,

APPR

OVAL

SPC

B DE

S.

APP

ENG.

Fax:

(408

)434

-050

7

Milp

itas,

CA 95

035

Phon

e: (4

08)4

32-1

900

1630

McC

arth

y Blvd

.

LTC

Conf

iden

tial-F

or C

usto

mer

Use

Onl

y

CUST

OMER

NOT

ICE

LINE

AR T

ECHN

OLOG

Y HA

S MA

DE A

BES

T EF

FORT

TO

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GN A

CIRC

UIT

THAT

MEE

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USTO

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LIED

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ONS;

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EVER

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EMAI

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HE C

USTO

MER'

S RE

SPON

SIBI

LITY

TO

VERI

FY P

ROPE

R AN

D RE

LIAB

LE O

PERA

TION

IN T

HE A

CTUA

LAP

PLIC

ATIO

N. C

OMPO

NENT

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STIT

UTIO

N AN

D PR

INTE

DCI

RCUI

T BO

ARD

LAYO

UT M

AY S

IGNI

FICA

NTLY

AFF

ECT

CIRC

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PERF

ORMA

NCE

OR R

ELIA

BILI

TY. C

ONTA

CT L

INEA

RTE

CHNO

LOGY

APP

LICA

TION

S EN

GINE

ERIN

G FO

R AS

SIST

ANCE

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THIS

CIR

CUIT

IS P

ROPR

IETA

RY T

O LI

NEAR

TEC

HNOL

OGY

AND

SUPP

LIED

FOR

USE

WIT

H LI

NEAR

TEC

HNOL

OGY

PART

S.SC

ALE

= NO

NE

www.

linea

r.com

SIZE

:

SKU

NO.

SCHE

MAT

IC N

O. A

ND R

EVIS

ION: 1

5

N/A

M.HA

WKI

NS

BOB

SMIT

H

710-

DC

2024

A R

EV

05

Frid

ay, M

ay 2

2, 2

015

DC

2024

A-A

LTC4

282IU

H

E1

E13

R18

10k

E6

R12

5.11

k

R3

3.4k

R11

3.01

kR

103.

01k

E21

E3

R1

34.8

k

E18

C3

33pF

D3

GR

EE

N

2 1

J1 VU

NR

EG

1

GN

D3

MIS

O5

MO

SI/S

DA

7

EE

SD

A9

EE

SC

L11

GN

D13

VC

CIO

2

SC

K/S

CL

4C

S6

GN

D8

EE

VC

C10

EE

GN

D12

GP

IO14

C6

1.0u

F

D5 RE

D

2 1

JP1

1 32

E2

C13

0.1u

F

R20

OP

TY

14.

0 M

hz

1 2

R22

5.11

k

R19

OP

T

Z3M

MS

Z523

1B5.

1V1

2

E12

Q5

2N70

02

3

1

2

R7

22.1

k

Z1 MM

SZ5

231B

5.1V

1 2

E10

R15

40.

0

U1

LTC

4282

UV

32

OV

2

SD

AI

12

SD

AO

13

ALE

RT

15

VC

C5

TIM

ER

6

ADR0 9ADR1 10ADR2 11

LOCK 4

GND 3

KGND 20

CLK

_O7

CLK

_I8

GP

IO3

17G

PIO

218

GP

IO1

19

FB21

ON1

SOURCE22GATE123GATE224

SENSE-225

ADC-26

SENSE-127

SENSE+228ADC+30

SC

L14

NC 16

SENSE+129VDD31

EXPOSED PAD 33

R15

20.

0

R6

10k

R5

10k

E7

JP6

1 32

JP2

1 2 3 4

D15

SM

CJ2

8A

21

C4

OP

T

C2

33pF

R8

3.01

k

E8

JP5

1 2 3 4

E16

E14

C14

0.1u

F

D8

GR

EE

N

2 1

R2

1.18

k

R16

0.0

Q4

2N70

02

3

1

2

D1

GR

EE

N

2 1

D2 GR

EE

N

2 1

R15

50.

0

TP1

R14

5.11

k

E5

E17

J2

AU

XP

1S

DA

2G

ND

3S

CL

4LG

KP

WR

5A

LER

TB6

GP

IO_1

7O

UTE

N_0

8O

UTE

N_1

9G

ND

10A

UX

SC

L11

AU

XS

DA

12

E4

C7

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uF

R4

10k

JP4

1 2 3 4

JP3

1 2 3 4

U2

24LC

025-

I /S

T

SD

A5

VC

C8

A0

1

A1

2

A2

3

VS

S4

WP

7

SC

L6

R15

30.

0

Z2M

MS

Z523

1B5.

1V1

2

Q3

2N70

02

3

1

2

D6

GR

EE

N

2 1

R13

5.11

k

R21

3.01

k

R15

0.0

R15

10.

0

D9

GR

EE

N

2 1

E19

E15

E20

D7

GR

EE

N

2 1

R17

10k

TP2

E11

Y2

1 3

2

R9

OP

T

E9

15dc2024afa

DEMO MANUAL DC2024A


B B

C C

D D

E E

44

33

22

11

=HIG

H C

UR

REN

T C

ON

NEC

TIO

NS

"RS1

"

"RS2

"

UNLE

SS O

THER

WIS

E NO

TED:

1. AL

L RE

SIST

ORS

THIS

PAG

E AR

E 1%

0402

.2.

ALL

CAPA

CITO

RS T

HIS

PAGE

ARE

0603

.3.

ALL

0.003

OHM

SEN

SE R

ESIS

TORS

ARE

SIZ

E 25

12.

PRIM

AR

Y SI

DE

PRIM

AR

Y SI

DE

GA

TE2

SEN

SE+1

AD

C+

SEN

SE+2

AD

C-

SEN

SE-2

SEN

SE-1

PRIM

AR

Y SI

DE

GA

TE1

"Q1"

PRIM

AR

Y SI

DE

"Q2"

(TO

BO

TTO

M S

IDE

)

(TO

BO

TTO

M S

IDE

)

WIT

H I²C

COM

PATI

BLE

MONI

TORI

NG A

ND E

EPRO

MHI

GH C

URRE

NT H

OT S

WAP

CON

TROL

LER

(OP

T)

(OP

T)

(OP

T)

(OP

T)

AD

C+

OP

TIO

NA

L

NIC

HIC

ON

P/N

UV

R1E

102M

PD

OR

EQ

UIV

ALE

NT

OP

TIO

NA

L

NIC

HIC

ON

P/N

UV

R1E

102M

PD

OR

EQ

UIV

ALE

NT

1000

uF

1000

uF

OP

TO

PT

INP

UT

SO

UR

CE

AD

C+

SE

NS

E+1

SE

NS

E+2

GA

TE2

SE

NS

E-2

SE

NS

E-1

AD

C-

INP

UT

GA

TE1

A B

DATE

:

IC N

O.

SHEE

TOF

TITL

E: D

EMO

CIRC

UIT

SCHE

MAT

IC,

APPR

OVAL

SPC

B DE

S.

APP

ENG.

Fax:

(408

)434

-050

7

Milp

itas,

CA 95

035

Phon

e: (4

08)4

32-1

900

1630

McC

arth

y Blvd

.

LTC

Conf

iden

tial-F

or C

usto

mer

Use

Onl

y

CUST

OMER

NOT

ICE

LINE

AR T

ECHN

OLOG

Y HA

S MA

DE A

BES

T EF

FORT

TO

DESI

GN A

CIRC

UIT

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TS C

USTO

MER-

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LIED

SPE

CIFI

CATI

ONS;

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EVER

, IT R

EMAI

NS T

HE C

USTO

MER'

S RE

SPON

SIBI

LITY

TO

VERI

FY P

ROPE

R AN

D RE

LIAB

LE O

PERA

TION

IN T

HE A

CTUA

LAP

PLIC

ATIO

N. C

OMPO

NENT

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STIT

UTIO

N AN

D PR

INTE

DCI

RCUI

T BO

ARD

LAYO

UT M

AY S

IGNI

FICA

NTLY

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ECT

CIRC

UIT

PERF

ORMA

NCE

OR R

ELIA

BILI

TY. C

ONTA

CT L

INEA

RTE

CHNO

LOGY

APP

LICA

TION

S EN

GINE

ERIN

G FO

R AS

SIST

ANCE

.

THIS

CIR

CUIT

IS P

ROPR

IETA

RY T

O LI

NEAR

TEC

HNOL

OGY

AND

SUPP

LIED

FOR

USE

WIT

H LI

NEAR

TEC

HNOL

OGY

PART

S.SC

ALE

= NON

E

www.

linea

r.com

SIZE

:

SKU

NO.

SCHE

MAT

IC N

O. A

ND R

EVIS

ION: 2

5

N/A

M.HA

WKI

NS

BOB

SMIT

H

710-

DC

2024

A R

EV 0

5Fr

iday

, May

22,

201

5

DC

2024

A-A

LTC4

282IU

H

DATE

:

IC N

O.

SHEE

TOF

TITL

E: D

EMO

CIRC

UIT

SCHE

MAT

IC,

APPR

OVAL

SPC

B DE

S.

APP

ENG.

Fax:

(408

)434

-050

7

Milp

itas,

CA 95

035

Phon

e: (4

08)4

32-1

900

1630

McC

arth

y Blvd

.

LTC

Conf

iden

tial-F

or C

usto

mer

Use

Onl

y

CUST

OMER

NOT

ICE

LINE

AR T

ECHN

OLOG

Y HA

S MA

DE A

BES

T EF

FORT

TO

DESI

GN A

CIRC

UIT

THAT

MEE

TS C

USTO

MER-

SUPP

LIED

SPE

CIFI

CATI

ONS;

HOW

EVER

, IT R

EMAI

NS T

HE C

USTO

MER'

S RE

SPON

SIBI

LITY

TO

VERI

FY P

ROPE

R AN

D RE

LIAB

LE O

PERA

TION

IN T

HE A

CTUA

LAP

PLIC

ATIO

N. C

OMPO

NENT

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STIT

UTIO

N AN

D PR

INTE

DCI

RCUI

T BO

ARD

LAYO

UT M

AY S

IGNI

FICA

NTLY

AFF

ECT

CIRC

UIT

PERF

ORMA

NCE

OR R

ELIA

BILI

TY. C

ONTA

CT L

INEA

RTE

CHNO

LOGY

APP

LICA

TION

S EN

GINE

ERIN

G FO

R AS

SIST

ANCE

.

THIS

CIR

CUIT

IS P

ROPR

IETA

RY T

O LI

NEAR

TEC

HNOL

OGY

AND

SUPP

LIED

FOR

USE

WIT

H LI

NEAR

TEC

HNOL

OGY

PART

S.SC

ALE

= NON

E

www.

linea

r.com

SIZE

:

SKU

NO.

SCHE

MAT

IC N

O. A

ND R

EVIS

ION: 2

5

N/A

M.HA

WKI

NS

BOB

SMIT

H

710-

DC

2024

A R

EV 0

5Fr

iday

, May

22,

201

5

DC

2024

A-A

LTC4

282IU

H

DATE

:

IC N

O.

SHEE

TOF

TITL

E: D

EMO

CIRC

UIT

SCHE

MAT

IC,

APPR

OVAL

SPC

B DE

S.

APP

ENG.

Fax:

(408

)434

-050

7

Milp

itas,

CA 95

035

Phon

e: (4

08)4

32-1

900

1630

McC

arth

y Blvd

.

LTC

Conf

iden

tial-F

or C

usto

mer

Use

Onl

y

CUST

OMER

NOT

ICE

LINE

AR T

ECHN

OLOG

Y HA

S MA

DE A

BES

T EF

FORT

TO

DESI

GN A

CIRC

UIT

THAT

MEE

TS C

USTO

MER-

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LIED

SPE

CIFI

CATI

ONS;

HOW

EVER

, IT R

EMAI

NS T

HE C

USTO

MER'

S RE

SPON

SIBI

LITY

TO

VERI

FY P

ROPE

R AN

D RE

LIAB

LE O

PERA

TION

IN T

HE A

CTUA

LAP

PLIC

ATIO

N. C

OMPO

NENT

SUB

STIT

UTIO

N AN

D PR

INTE

DCI

RCUI

T BO

ARD

LAYO

UT M

AY S

IGNI

FICA

NTLY

AFF

ECT

CIRC

UIT

PERF

ORMA

NCE

OR R

ELIA

BILI

TY. C

ONTA

CT L

INEA

RTE

CHNO

LOGY

APP

LICA

TION

S EN

GINE

ERIN

G FO

R AS

SIST

ANCE

.

THIS

CIR

CUIT

IS P

ROPR

IETA

RY T

O LI

NEAR

TEC

HNOL

OGY

AND

SUPP

LIED

FOR

USE

WIT

H LI

NEAR

TEC

HNOL

OGY

PART

S.SC

ALE

= NON

E

www.

linea

r.com

SIZE

:

SKU

NO.

SCHE

MAT

IC N

O. A

ND R

EVIS

ION: 2

5

N/A

M.HA

WKI

NS

BOB

SMIT

H

710-

DC

2024

A R

EV 0

5Fr

iday

, May

22,

201

5

DC

2024

A-A

LTC4

282IU

H

R30

3 m

ohm

+C

1

1 2

R58

1.0

C10

0.02

7uF

50V

R45

59k

Q10

PS

MN

2R0-

30Y

LE4

235

1

Q8

PS

MN

2R0-

30Y

LE4

235

1

R60

1.0

C12

0.02

2uF

D11

SM

CJ2

8A

21

Q2

PS

MN

1R5-

30B

LE1

34

R23

1.0

R69

1.0

R75

1.0

R24

1.0

R54

1.0

R32

1.0

R73

10

R59

1.0

C9

0.02

7uF

50V

E22

R26

1.0

R51

1.0

R37

1.0

Q1

PS

MN

1R5-

30B

LE1

34

R65

1.0

R57

3 m

ohm

TP6

1

R28

1.0

R27

1.0

R29

1.0

R62

3 m

ohm

R35

3 m

ohm

R41

3 m

ohm

R14

410

D10

SM

CJ2

8A

21

R70

1.0

R42

1.0

R36

1.0

R50

1.0

C11

0.02

2uF

R61

1.0

+C

8

1 2

Q11

N-C

HA

NN

EL

UN

IVE

RS

AL

1

23

R52

3 m

ohm

R34

1.0

R38

1.0

D12

SM

CJ2

8A

21

R53

1.0

R25

3 m

ohm

Q9

N-C

HA

NN

EL

UN

IVE

RS

AL

1

23

R39

1.0

R67

3 m

ohm

R72

3 m

ohm

R48

1.0

R40

10

D13

SM

CJ2

8A

21

R55

1.0

R43

1.0

TP4

1R

491.

0

R46

1.0

R71

1.0

R68

1.0

E23

R14

510

R64

1.0

R66

1.0

TP5

1

R76

59k

TP3

1

R47

3 m

ohm

D14

SM

CJ2

8A

21

R14

610

R63

1.0

R44

1.0

TP7

1

R33

1.0

R14

310

R31

1.0

R56

1.0

TP8

1

R74

1.0

16dc2024afa

DEMO MANUAL DC2024A


B B

C C

D D

E E

44

33

22

11

SEC

ON

DA

RY

SID

E ST

UFF

ING

OPT

ION

S, T

HIS

PA

GE

SEC

ON

DA

RY

SID

E

SEC

ON

DA

RY

SID

E

"RS1

"

"RS2

"

(FR

OM

TO

P S

IDE

)

(FR

OM

TO

P S

IDE

)

SEC

ON

DA

RY

SID

E"Q

1"

SEC

ON

DA

RY

SID

E"Q

2"

WIT

H I²C

COM

PATI

BLE

MONI

TORI

NG A

ND E

EPRO

MHI

GH C

URRE

NT H

OT S

WAP

CON

TROL

LER

(OP

T)

(OP

T)

(OP

T)

(OP

T)

(OP

T)

(OP

T)

=HIG

H C

UR

REN

T C

ON

NEC

TIO

NS

2. AL

L OP

TION

AL S

ENSE

RES

ISTO

RS A

RE S

IZE

2512

.

UNLE

SS O

THER

WIS

E NO

TED:

1. AL

L RE

SIST

ORS

THIS

PAG

E AR

E 1%

0402

.

INP

UT

SE

NS

E-2

SE

NS

E-1

AD

C-

AD

C+

SE

NS

E+1

SE

NS

E+2

SO

UR

CE

GA

TE2

GA

TE1

A

B

DATE

:

IC N

O.

SHEE

TOF

TITL

E: D

EMO

CIRC

UIT

SCHE

MAT

IC,

APPR

OVAL

SPC

B DE

S.

APP

ENG.

Fax:

(408

)434

-050

7

Milp

itas,

CA 95

035

Phon

e: (4

08)4

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17dc2024afa

DEMO MANUAL DC2024A

Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.


B B

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SOURCE22GATE123GATE224

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18dc2024afa

DEMO MANUAL DC2024A

Linear Technology Corporation1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com LINEAR TECHNOLOGY CORPORATION 2015

LT 0116 REV A • PRINTED IN USA

DEMONSTRATION BOARD IMPORTANT NOTICE

Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:

This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.

If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or agency certified (FCC, UL, CE, etc.).

No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.

LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.

Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and observe good laboratory practice standards. Common sense is encouraged.

This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

Copyright © 2004, Linear Technology Corporation

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