FAN7392 High-Current, High- and Low-Side, Gate-Drive...

18
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7392 — High-Current, High- and Low-Side, Gate-Drive IC FAN7392 Rev. 1.0.2 July 2009 FAN7392 High-Current, High- and Low-Side, Gate-Drive IC Features Floating Channel for Bootstrap Operation to +600V 3A/3A Sourcing/Sinking Current Driving Capability Common-Mode dv/dt Noise Canceling Circuit 3.3V Logic Compatible Separate Logic Supply (V DD ) Range from 3.3V to 20V Under-Voltage Lockout for V CC and V BS Cycle-by-Cycle Edge-Triggered Shutdown Logic Matched Propagation Delay for Both Channels Outputs In-phase with Input Signals Available in 14-DIP and 16-SOP (Wide) Packages Applications High-Speed Power MOSFET and IGBT Gate Driver Server Power Supply Uninterrupted Power Supply (UPS) Telecom System Power Supply Distributed Power Supply Motor Drive Inverter Description The FAN7392 is a monolithic high- and low-side gate drive IC, that can drive high-speed MOSFETs and IGBTs that operate up to +600V. It has a buffered output stage with all NMOS transistors designed for high pulse current driving capability and minimum cross-conduction. Fair- child’s high-voltage process and common-mode noise canceling techniques provide stable operation of the high-side driver under high dv/dt noise circumstances. An advanced level-shift circuit offers high-side gate driver operation up to V S =-9.8V (typical) for V BS =15V. Logic inputs are compatible with standard CMOS or LSTTL output, down to 3.3V logic. The UVLO circuit prevents malfunction when V CC and V BS are lower than the speci- fied threshold voltage. The high-current and low-output voltage drop feature makes this device suitable for half- and full-bridge inverters, like switching-mode power sup- ply and high-power DC-DC converter applications. Ordering Information For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html . 14-PDIP 16-SOP Part Number Operating Temperature Range Package Eco Status Packing Method FAN7392N -40°C to +125°C 14-PDIP RoHS Tube FAN7392M 16-SOP Tube FAN7392MX Tape and Reel

Transcript of FAN7392 High-Current, High- and Low-Side, Gate-Drive...

Page 1: FAN7392 High-Current, High- and Low-Side, Gate-Drive ICedge.rit.edu/edge/P10022/public/team_docs/parts... · high-side driver under high dv/dt noise circumstances. An advanced level-shift

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com

FAN

7392 — H

igh-Current, H

igh- and Low-Side, G

ate-Drive IC

FAN7392 Rev. 1.0.2

July 2009

FAN7392High-Current, High- and Low-Side, Gate-Drive IC

FeaturesFloating Channel for Bootstrap Operation to +600V3A/3A Sourcing/Sinking Current Driving CapabilityCommon-Mode dv/dt Noise Canceling Circuit3.3V Logic CompatibleSeparate Logic Supply (VDD) Range from 3.3V to 20VUnder-Voltage Lockout for VCC and VBSCycle-by-Cycle Edge-Triggered Shutdown LogicMatched Propagation Delay for Both ChannelsOutputs In-phase with Input SignalsAvailable in 14-DIP and 16-SOP (Wide) Packages

ApplicationsHigh-Speed Power MOSFET and IGBT Gate Driver Server Power SupplyUninterrupted Power Supply (UPS)Telecom System Power SupplyDistributed Power SupplyMotor Drive Inverter

DescriptionThe FAN7392 is a monolithic high- and low-side gatedrive IC, that can drive high-speed MOSFETs and IGBTsthat operate up to +600V. It has a buffered output stagewith all NMOS transistors designed for high pulse currentdriving capability and minimum cross-conduction. Fair-child’s high-voltage process and common-mode noisecanceling techniques provide stable operation of thehigh-side driver under high dv/dt noise circumstances.An advanced level-shift circuit offers high-side gate driveroperation up to VS=-9.8V (typical) for VBS=15V. Logicinputs are compatible with standard CMOS or LSTTLoutput, down to 3.3V logic. The UVLO circuit preventsmalfunction when VCC and VBS are lower than the speci-fied threshold voltage. The high-current and low-outputvoltage drop feature makes this device suitable for half-and full-bridge inverters, like switching-mode power sup-ply and high-power DC-DC converter applications.

Ordering Information

For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.

14-PDIP 16-SOP

Part Number OperatingTemperature Range Package Eco Status Packing Method

FAN7392N

-40°C to +125°C

14-PDIP

RoHS

Tube

FAN7392M16-SOP

Tube

FAN7392MX Tape and Reel

Page 2: FAN7392 High-Current, High- and Low-Side, Gate-Drive ICedge.rit.edu/edge/P10022/public/team_docs/parts... · high-side driver under high dv/dt noise circumstances. An advanced level-shift

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.comFAN7392 Rev. 1.0.2 2

FAN

7392 — H

igh-Current, H

igh- and Low-Side, G

ate-Drive IC

Typical Application Diagrams

Figure 1. Typical Application Circuit (Referenced 14-DIP)

Figure 2. Typical Application Circuit (Referenced 16-SOP)

DBOOT

Q1

RBOOT

CBOOT

15V

Q2C1

R2

R1

Up to 600V

Controller

HIN

LIN

LO

COM

VB

VS

VDD

SD

HIN

NC

13

NC

HO

VSS

NC

12

14

11

10

9

8

2

3

1

4

7

5

6

LIN VCC

SD

15V

Load

DBOOT

Q1

RBOOT

CBOOT

15V

Q2C1

R2

R1

Up to 600V

Controller

HIN

LIN

LO

COM

VB

VSVDD

SD

HIN

NC

15

NC

HO

VSS

NC

14

16

13

12

11

10

2

3

1

4

8

6

7

LIN VCC

SD

15V

Load

NC 5

NC9

Page 3: FAN7392 High-Current, High- and Low-Side, Gate-Drive ICedge.rit.edu/edge/P10022/public/team_docs/parts... · high-side driver under high dv/dt noise circumstances. An advanced level-shift

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.comFAN7392 Rev. 1.0.2 3

FAN

7392 — H

igh-Current, H

igh- and Low-Side, G

ate-Drive IC

Internal Block Diagram

Figure 3. Functional Block Diagram (Referenced 14-Pin)

Figure 4. Functional Block Diagram (Referenced 16-SOP)

UVLO DR

IVERPULSE

GEN

ERA

TORHIN

VCC

COM

VB

VS

RRS Q

DR

IVER

HS(ON/OFF)

LS(ON/OFF) DELAY

LIN UVLO

HO

LO

SCHMITT TRIGGER INPUT

CYCLE-By-CYCLE EDGE TRIGGERED

SHUTDOWN

NOISECANCELLER

VSS/COMLEVELSHIFT

VSS

10

12

13

Pin 4, 8, and 14 are no connection

SD 11

VDD 9

3

2

6

5

1

7

UVLO DR

IVERPULSE

GEN

ERA

TORHIN

VCC

COM

VB

VS

RRS Q

DR

IVER

HS(ON/OFF)

LS(ON/OFF) DELAY

LIN UVLO

HO

LO

SCHMITT TRIGGER INPUT

CYCLE-By-CYCLE EDGE TRIGGERED

SHUTDOWN

NOISECANCELLER

VSS/COMLEVELSHIFT

VSS

12

14

15

Pin 4, 5, 9,10 and 16 are no connection

SD 13

VDD 11

3

2

7

6

1

8

Page 4: FAN7392 High-Current, High- and Low-Side, Gate-Drive ICedge.rit.edu/edge/P10022/public/team_docs/parts... · high-side driver under high dv/dt noise circumstances. An advanced level-shift

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.comFAN7392 Rev. 1.0.2 4

FAN

7392 — H

igh-Current, H

igh- and Low-Side, G

ate-Drive IC

Pin Configuration

Figure 5. Pin Configurations (Top View)

Pin Definitions14-Pin 16-Pin Name Description

1 1 LO Low-Side Driver Output

2 2 COM Low-Side Return

3 3 VCC Low-Side Supply Voltage

5 6 VS High-Voltage Floating Supply Return

6 7 VB High-Side Floating Supply

7 8 HO High-Side Driver Output

9 11 VDD Logic Supply Voltage

10 12 HIN Logic Input for High-Side Gate Driver Output

11 13 SD Logic Input for Shutdown Function

12 14 LIN Logic Input for Low-Side Gate Driver Output

13 15 VSS Logic Ground

4,8,14 4, 5, 9, 10, 16 NC No Connect

LO

NC

FAN

7392 HIN

HO NC

VDD

COM

VB

VS

VSS

1

2

3

4

5

6

7

14

13

12

11

10

9

8

SD

NC

VCC LIN

LO

NC

FAN

7392MHIN

HO

NC

VDD

COM

VB

VS

VSS

1

2

3

4

5

6

7

16

15

14

13 SD

NC

VCC LIN

12

11

10

98

NC

NC

(a) 14-DIP (b) 16-SOP (Wide Body)

Page 5: FAN7392 High-Current, High- and Low-Side, Gate-Drive ICedge.rit.edu/edge/P10022/public/team_docs/parts... · high-side driver under high dv/dt noise circumstances. An advanced level-shift

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.comFAN7392 Rev. 1.0.2 5

FAN

7392 — H

igh-Current, H

igh- and Low-Side, G

ate-Drive IC

Absolute Maximum RatingsStresses exceeding the absolute maximum ratings may damage the device. The device may not function or be opera-ble above the recommended operating conditions and stressing the parts to these levels is not recommended. In addi-tion, extended exposure to stresses above the recommended operating conditions may affect device reliability. Theabsolute maximum ratings are stress ratings only. TA=25°C unless otherwise specified.

Notes: 1. Mounted on 76.2 x 114.3 x 1.6mm PCB (FR-4 glass epoxy material).2. Refer to the following standards:

JESD51-2: Integral circuits thermal test method environmental conditions, natural convection; andJESD51-3: Low effective thermal conductivity test board for leaded surface-mount packages.

3. Do not exceed power dissipation (PD) under any circumstances.

Recommended Operating ConditionsThe Recommended Operating Conditions table defines the conditions for actual device operation. Recommendedoperating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does notrecommend exceeding them or designing to absolute maximum ratings.

Symbol Characteristics Min. Max. UnitVB High-Side Floating Supply Voltage -0.3 625.0 V

VS High-Side Floating Offset Voltage VB-25.0 VB+0.3 V

VHO High-Side Floating Output Voltage VS-0.3 VB+0.3 V

VCC Low-Side Supply Voltage -0.3 25.0 V

VLO Low-Side Floating Output Voltage -0.3 VCC+0.3 V

VDD Logic Supply Voltage -0.3 VSS+25.0 V

VSS Logic Supply Offset Voltage VCC-25.0 VCC+0.3 V

VIN Logic Input Voltage (HIN, LIN and SD) VSS-0.3 VDD+0.3 V

dVS/dt Allowable Offset Voltage Slew Rate ±50 V/ns

PD Power Dissipation(1, 2, 3) 14-PDIP 1.6W

16-SOP 1.3

θJA Thermal Resistance14-PDIP 75

°C/W 16-SOP 95

TJ Maximum Junction Temperature +150 °C

TSTG Storage Temperature -55 +150 °C

Symbol Parameter Min. Max. UnitVB High-Side Floating Supply Voltage VS+10 VS+20 V

VS High-Side Floating Supply Offset Voltage 6-VCC 600 V

VHO High-Side Output Voltage VS VB V

VCC Low-Side Supply Voltage 10 20 V

VLO Low-Side Output Voltage 0 VCC V

VDD Logic Supply Voltage VSS+3 VSS+20 V

VSS Logic Supply Offset Voltage -5 5 V

VIN Logic Input Voltage VSS VDD V

TA Operating Ambient Temperature -40 +125 °C

Page 6: FAN7392 High-Current, High- and Low-Side, Gate-Drive ICedge.rit.edu/edge/P10022/public/team_docs/parts... · high-side driver under high dv/dt noise circumstances. An advanced level-shift

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.comFAN7392 Rev. 1.0.2 6

FAN

7392 — H

igh-Current, H

igh- and Low-Side, G

ate-Drive IC

Electrical Characteristics VBIAS(VCC, VBS, VDD)=15.0V, VSS=COM=0V and TA=25°C, unless otherwise specified. The VIH, VIL, and IINparameters are referenced to VSS and are applicable to the respective input leads: HIN, LIN, and SD. The VO and IOparameters are referenced to VS and COM and are applicable to the respective output leads: HO and LO.

Symbol Characteristics Test Condition Min. Typ. Max. UnitLow-Side Power Supply Section

IQCC Quiescent VCC Supply Current VIN=0V or VDD 40 80 μA

IQDD Quiescent VDD Supply Current VIN=0V or VDD 10 μA

IPCC Operating VCC Supply Current fIN=20kHz, rms, VIN=15VPP 430 μA

IPDD Operating VDD Supply Current fIN=20kHz, rms, VIN=15VPP 300 μA

ISD Shutdown Supply Current SD=VDD 120 μA

VCCUV+VCC Supply Under-Voltage Positive-Going Threshold Voltage

VIN=0V, VCC=Sweep 7.7 8.8 9.9 V

VCCUV-VCC Supply Under-Voltage Negative-Going Threshold Voltage

VIN=0V, VCC=Sweep 7.3 8.4 9.5 V

VCCUVHVCC Supply Under-Voltage Lockout Hysteresis Voltage

VIN=0V, VCC=Sweep 0.4 V

Bootstrapped Supply Section

IQBS Quiescent VBS Supply Current VIN=0V or VDD 60 130 μA

IPBS Operating VBS Supply Current fIN=20kHz, rms value 500 μA

VBSUV+VBS Supply Under-Voltage Positive-Going Threshold Voltage

VIN=0V, VBS=Sweep 7.7 8.8 9.9 V

VBSUV-VBS Supply Under-Voltage Negative-Going Threshold Voltage

VIN=0V, VBS=Sweep 7.3 8.4 9.5 V

VBSUVHVBS Supply Under-Voltage Lockout Hysteresis Voltage

VIN=0V, VBS=Sweep 0.4 V

ILK Offset Supply Leakage Current VB=VS=600V 50 μA

Input Locic Section (HIN, LIN, and SD)

VIH Logic “1” Input Threshold VoltageVDD=3V 2.4 V

VDD=15V 9.5 V

VIL Logic “0” Input Threshold VoltageVDD=3V 0.8 V

VDD=15V 6.0 V

IIN+ Logic Input High Bias Current VIN=VDD 20 40 μA

IIN- Logic Input Low Bias Current VIN=0V 3 μA

RIN Logic Input Pull-Down Resistance 375 750 KΩ

Gate Driver Output Section

VOH High-Level Output Voltage (VBIAS - VO) No Load (IO=0A) 1.5 V

VOL Low-Level Output Voltage No Load (IO=0A) 200 mV

IO+ Output High, Short-Circuit Pulsed Current(4) VO=0V, PW ≤10µs 2.5 3.0 A

IO- Output Low, Short-Circuit Pulsed Current(4) VO=15V, PW ≤10µs 2.5 3.0 A

VSS/COM VSS-COM/COM-VSS Voltage Educability -5.0 5.0 V

- VSAllowable Negative VS Pin Voltage for HIN Signal Propagation to HO -9.8 -7.0 V

Page 7: FAN7392 High-Current, High- and Low-Side, Gate-Drive ICedge.rit.edu/edge/P10022/public/team_docs/parts... · high-side driver under high dv/dt noise circumstances. An advanced level-shift

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.comFAN7392 Rev. 1.0.2 7

FAN

7392 — H

igh-Current, H

igh- and Low-Side, G

ate-Drive IC

Dynamic Electrical Characteristics VBIAS(VCC, VBS, VDD)=15.0V, VSS=COM=0V, CLOAD=1000pF, TA=25°C, unless otherwise specified.

Note: 4. These parameters guaranteed by design.

Symbol Parameter Conditions Min. Typ. Max. Unitton Turn-On Propagation Delay Time VS=0V 130 180 ns

toff Turn-Off Propagation Delay Time VS=0V 150 200 ns

tsd Shutdown propagation Delay Time(4) 130 180 ns

tr Turn-On Rise Time 25 50 ns

tf Turn-Off Fall Time 20 45 ns

MT Delay Matching, HO & LO Turn-On/Off 35 ns

Page 8: FAN7392 High-Current, High- and Low-Side, Gate-Drive ICedge.rit.edu/edge/P10022/public/team_docs/parts... · high-side driver under high dv/dt noise circumstances. An advanced level-shift

FAN

7392 — H

igh-Current, H

igh- and Low-Side, G

ate-Drive IC

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.comFAN7392 Rev. 1.0.2 8

Typical Characteristics

Figure 6. Turn-On Propagation Delay vs. Temperature

Figure 7. Turn-Off Propagation Delay vs. Temperature

Figure 8. Turn-On Rise Time vs. Temperature

Figure 9. Turn-Off Fall Time vs. Temperature

Figure 10. Turn-On Delay Matching vs. Temperature Figure 11. Turn-Off Delay Matching vs. Temperature

-40 -20 0 20 40 60 80 100 12080

100

120

140

160

180

t ON [n

s]

Temperature [°C]-40 -20 0 20 40 60 80 100 120

100

120

140

160

180

200

t OFF

[ns]

Temperature [°C]

-40 -20 0 20 40 60 80 100 1200

10

20

30

40

50

t R [n

s]

Temperature [°C]-40 -20 0 20 40 60 80 100 1200

10

20

30

40

50

t F [n

s]

Temperature [°C]

-40 -20 0 20 40 60 80 100 1200

10

20

30

MT O

N [n

s]

Temperature [°C]-40 -20 0 20 40 60 80 100 1200

10

20

30

MT O

FF [n

s]

Temperature [°C]

Page 9: FAN7392 High-Current, High- and Low-Side, Gate-Drive ICedge.rit.edu/edge/P10022/public/team_docs/parts... · high-side driver under high dv/dt noise circumstances. An advanced level-shift

FAN

7392 — H

igh-Current, H

igh- and Low-Side, G

ate-Drive IC

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.comFAN7392 Rev. 1.0.2 9

Typical Characteristics (Continued)

Figure 12. Shutdown Propagation Delay vs. Temperature

Figure 13. Logic Input High Bias Current vs. Temperature

Figure 14. Quiescent VCC Supply Current vs. Temperature

Figure 15. Quiescent VBS Supply Current vs. Temperature

Figure 16. Operating VCC Supply Current vs. Temperature

Figure 17. Operating VBS Supply Current vs. Temperature

-40 -20 0 20 40 60 80 100 12080

100

120

140

160

180

t SD [n

s]

Temperature [°C]-40 -20 0 20 40 60 80 100 1200

10

20

30

40

I IN+ [

μA]

Temperature [°C]

-40 -20 0 20 40 60 80 100 1200

10

20

30

40

50

60

70

80

I QC

C [

μA]

Temperature [°C]-40 -20 0 20 40 60 80 100 1200

20

40

60

80

100

120

I Q

BS [

μA]

Temperature [°C]

-40 -20 0 20 40 60 80 100 1200

200

400

600

800

1000

I PC

C [

μA]

Temperature [°C]-40 -20 0 20 40 60 80 100 1200

200

400

600

800

1000

I PBS [

μA]

Temperature [°C]

Page 10: FAN7392 High-Current, High- and Low-Side, Gate-Drive ICedge.rit.edu/edge/P10022/public/team_docs/parts... · high-side driver under high dv/dt noise circumstances. An advanced level-shift

FAN

7392 — H

igh-Current, H

igh- and Low-Side, G

ate-Drive IC

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.comFAN7392 Rev. 1.0.2 10

Typical Characteristics (Continued)

Figure 18. VCC UVLO+ vs. Temperature Figure 19. VCC UVLO- vs. Temperature

Figure 20. VBS UVLO+ vs. Temperature Figure 21. VBS UVLO- vs. Temperature

Figure 22. High-Level Output Voltage vs. Temperature

Figure 23. Low-Level Output Voltage vs. Temperature

-40 -20 0 20 40 60 80 100 120

8.0

8.5

9.0

9.5

V CC

UV

+ [V]

Temperature [°C]-40 -20 0 20 40 60 80 100 120

7.5

8.0

8.5

9.0

9.5

VC

CU

V- [V

]

Temperature [°C]

-40 -20 0 20 40 60 80 100 120

8.0

8.5

9.0

9.5

VB

SUV+

[V]

Temperature [°C]-40 -20 0 20 40 60 80 100 120

7.5

8.0

8.5

9.0

9.5

V B

SU

V- [V

]

Temperature [°C]

-40 -20 0 20 40 60 80 100 1200.0

0.5

1.0

1.5

VO

H [V

]

Temperature [°C]-40 -20 0 20 40 60 80 100 120

-20

-15

-10

-5

0

5

10

15

20

VO

L [mV

]

Temperature [°C]

Page 11: FAN7392 High-Current, High- and Low-Side, Gate-Drive ICedge.rit.edu/edge/P10022/public/team_docs/parts... · high-side driver under high dv/dt noise circumstances. An advanced level-shift

FAN

7392 — H

igh-Current, H

igh- and Low-Side, G

ate-Drive IC

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.comFAN7392 Rev. 1.0.2 11

Typical Characteristics (Continued)

Figure 24. Logic High Input Voltage vs. Temperature

Figure 25. Logic Low Input Voltage vs. Temperature

Figure 26. Allowable Negative VS Voltage vs. Temperature

Figure 27. Input Logic (HIN & LIN) Threshold Voltage vs. VDD Supply Voltage

.

Figure 28. Allowable Negative Vs Voltage for HIN Signal Propagation to High Side vs. Supply Voltage

-40 -20 0 20 40 60 80 100 1206

7

8

9

10

11

V IH [V

]

Temperature [°C]-40 -20 0 20 40 60 80 100 1203

4

5

6

7

8

9

10

VIL [V

]

Temperature [°C]

-40 -20 0 20 40 60 80 100 120-12

-11

-10

-9

-8

-7

V S [V

]

Temperature [°C]0 2 4 6 8 10 12 14 16 18 20

0

2

4

6

8

10

12

Lo

gic

Thre

shol

d Vo

ltage

[V]

VDD Logic Supply Voltage [V]

VIH

VIL

10 11 12 13 14 15 16 17 18 19 20

-16

-14

-12

-10

-8

-6

-4

VS

[V]

Supply Voltage [V]

VCC=VBSCOM=0VTA=25°C

Page 12: FAN7392 High-Current, High- and Low-Side, Gate-Drive ICedge.rit.edu/edge/P10022/public/team_docs/parts... · high-side driver under high dv/dt noise circumstances. An advanced level-shift

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.comFAN7392 Rev. 1.0.2 12

FAN

7392 — H

igh-Current, H

igh- and Low-Side, G

ate-Drive IC

Switching Time Definitions

Figure 29. Switching Time Test Circuit (Referenced 14-DIP)

Figure 30. Input/Output Timing Diagram

Figure 31. Switching Time Waveform Definitions

1nF 100nF

1nF

100nF

15V

LO

COM

VB

VS

VDD

SD

HIN

NC

13

NC

HO

VSS

NC14

11

10

9

8

LIN VCC

15V

12

2

3

1

4

7

5

6

15V

LO

HO

(0 to 600V)HIN

SD

LIN

10μF

10μF

10μF

Shutdown Skip

HINLIN

HOLO

SD

50%

90%

50%

tON

10%

tR tOFF tF

10%

90%

HINLIN

HOLO

Page 13: FAN7392 High-Current, High- and Low-Side, Gate-Drive ICedge.rit.edu/edge/P10022/public/team_docs/parts... · high-side driver under high dv/dt noise circumstances. An advanced level-shift

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.comFAN7392 Rev. 1.0.2 13

FAN

7392 — H

igh-Current, H

igh- and Low-Side, G

ate-Drive IC

Switching Time Definitions (Continued)

Figure 32. Shutdown Waveform Definition

Figure 33. Delay Matching Waveform Definitions

90%

50%

tSD

HOLO

SD

HINLIN

LO

50% 50%

10%

90%

HO

MTHOLO

MT

90%

10%

Page 14: FAN7392 High-Current, High- and Low-Side, Gate-Drive ICedge.rit.edu/edge/P10022/public/team_docs/parts... · high-side driver under high dv/dt noise circumstances. An advanced level-shift

FAN

7392 — H

igh-Current, H

igh- and Low-Side, G

ate-Drive IC

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.comFAN7392 Rev. 1.0.2 14

Application InformationNegative VS TransientThe bootstrap circuit has the advantage of being simpleand low cost, but has some limitations. The biggest diffi-culty with this circuit is the negative voltage present atthe emitter of the high-side switching device when high-side switch is turned-off in half-bridge application.

If the high-side switch, Q1, turns-off while the load cur-rent is flowing to an inductive load, a current commuta-tion occurs from high-side switch, Q1, to the diode, D2,in parallel with the low-side switch of the same inverterleg. Then the negative voltage present at the emitter ofthe high-side switching device, just before the freewheel-ing diode, D2, starts clamping, causes load current tosuddenly flow to the low-side freewheeling diode, D2, asshown in Figure 34.

Figure 34. Half-Bridge Application CircuitsThis negative voltage can be trouble for the gate driver’s output stage, there is the possibility to develop an over-voltage condition of the bootstrap capacitor, input signal missing and latch-up problems because it directly affects the source VS pin of the gate driver, as shown in Figure 35. This undershoot voltage is called “negative VS tran-sient”.

Figure 35. VS Waveforms During Q1 Turn-Off

Figure 36 and Figure 37 show the commutation of theload current between high-side switch, Q1, and low-sidefreewheelling diode, D3, in same inverter leg. The para-sitic inductances in the inverter circuit from the die wirebonding to the PCB tracks are jumped together in LC andLE for each IGBT. When the high-side switch, Q1, andlow-side switch, Q4, are turned on, the VS1 node isbelow DC+ voltage by the voltage drops associated withthe power switch and the parasitic inductances of the cir-cuit due to load current is flows from Q1 and Q4, asshown in Figure 36. When the high-side switch, Q1, isturned off and Q4, remained turned on, the load currentto flows the low-side freewheeling diode, D3, due to theinductive load connected to VS1 as shown in Figure 37.The current flows from ground (which is connected to theCOM pin of the gate driver) to the load and the negativevoltage present at the emitter of the high-side switchingdevice.

In this case, the COM pin of the gate driver is at a higherpotential than the VS pin due to the voltage drops associ-ated with freewheeling diode, D3, and parasitic ele-ments, LC3 and LE3.

Figure 36. Q1 and Q4 Turn-On

Figure 37. Q1 Turn-Off and D3 Conducting

Q1

Q2

DC+ Bus

VS

iLOAD

ifreewheeling

Load

D1

D2

Q1

VS

Freewheeling

GND

GND

Q1

Q3

DC+ Bus

VS1

iLOAD

ifreewheeling

Q2

Q4

VS2

LC2

LE2

LC4

LE4

LC1

LE1

LC3

LE3

VLC1

VLE1

VLC4

VLE4

Load

D1

D3

D2

D4

Q1

Q3

DC+ Bus

VS1

iLOAD

ifreewheeling

Q2

Q4

VS2

LC2

LE2

LC4

LE4

LC1

LE1

LC3

LE3

VLC3

VLE3

VLC4

VLE4

D1

D3

D2

D4

Load

Page 15: FAN7392 High-Current, High- and Low-Side, Gate-Drive ICedge.rit.edu/edge/P10022/public/team_docs/parts... · high-side driver under high dv/dt noise circumstances. An advanced level-shift

FAN

7392 — H

igh-Current, H

igh- and Low-Side, G

ate-Drive IC

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.comFAN7392 Rev. 1.0.2 15

The FAN7392 has a negative VS transient performancecurve, as shown in Figure 38.

Figure 38. Negative VS Transient Chracteristic

Even though the FAN7392 has been shown able to han-dle these negative VS tranient conditions, it is stronglyrecommended that the circuit designer limit the negativeVS transient as much as possible by careful PCB layoutto minimized the value of parasitic elements and compo-nent use. The amplitude of negative VS voltage is pro-portional to the parasitic inductances and the turn-offspeed, di/dt, of the switching device.

General GuidelinesPrinted Circuit Board Layout The relayout recommended for minimized parasitic ele-ments is as follows:

Direct tracks between switches with no loops or devia-tion.Avoid interconnect links. These can add significant inductance.Reduce the effect of lead-inductance by lowering package height above the PCB.Consider co-locating both power switches to reduce track length. To minimize noise coupling, the ground plane should not be placed under or near the high-voltage floating side.To reduce the EM coupling and improve the power switch turn-on/off performance, the gate drive loops must be reduced as much as possible.

Placement of ComponentsThe recommended placement and selection of compo-nent as follows:

Place a bypass capacitor between the VDD and VSS pins. A ceramic 1µF capacitor is suitable for most applications. This component should be placed as close as possible to the pins to reduce parasitic ele-ments.The bypass capacitor from VCC to COM supports both the low-side driver and bootstrap capacitor recharge. A value at least ten times higher than the bootstrap capacitor is recommended. The bootstrap resistor, RBOOT, must be considered in sizing the bootstrap resistance and the current devel-oped during initial bootstrap charge. If the resistor is needed in series with the bootstrap diode, verify that VB does not fall below COM (ground). Recommended use is typically 5 ~ 10Ω that increase the VBS time constant. If the votage drop of of bootstrap resistor and diode is too high or the circuit topology does not allow a sufficient charging time, a fast recovery or ultra-fast recovery diode can be used.The bootstrap capacitor, CBOOT, uses a low-ESR capacitor, such as ceramic capacitor.

It is stongly recommended that the placement of compo-nents is as follows:

Place components tied to the floating voltage pins (VB and VS) near the respective high-voltage portions of the device and the FAN7392. NC (not connected) pins in this package maximize the distance between the high-voltage and low-voltage pins (see Figure 5).Place and route for bypass capacitors and gate resis-tors as close as possible to gate drive IC.Locate the bootstrap diode, DBOOT, as close as possi-ble to bootstrap capacitor, CBOOT.The bootstrap diode must use a lower forward voltage drop and minimal switching time as soon as possible for fast recovery or ultra-fast diode.

0

-10

100 200 300 400 500 600 700 800 900 1000

Pulse Width [ns]

V S [V

]

-20

-30

-40

-50

-60

-70

-80

-90

-100

0

Page 16: FAN7392 High-Current, High- and Low-Side, Gate-Drive ICedge.rit.edu/edge/P10022/public/team_docs/parts... · high-side driver under high dv/dt noise circumstances. An advanced level-shift

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.comFAN7392 Rev. 1.0.2 16

FAN

7392 — H

igh-Current, H

igh- and Low-Side, G

ate-Drive IC

Physical Dimensions .

Figure 39. 14-Lead Dual In-Line Package (DIP)

Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any mannerwithout notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify orobtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products.Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:http://www.fairchildsemi.com/packaging/.

14 8

71

NOTES: UNLESS OTHERWISE SPECIFIED

A) THIS PACKAGE CONFORMS TO

JEDEC MS-001 VARIATION BA B) ALL DIMENSIONS ARE IN MILLIMETERS.

C)DIMENSIONS ARE EXCLUSIVE OF BURRS,

MOLD FLASH, AND TIE BAR EXTRUSIONS. D) DIMENSIONS AND TOLERANCES PER

ASME Y14.5-1994E) DRAWING FILE NAME: MKT-N14AREV7

6.606.09

8.127.62

0.350.20

19.5618.80

3.563.30 5.33 MAX

0.38 MIN

1.771.14

0.580.35 2.54

3.813.17 8.82

(1.74)

Page 17: FAN7392 High-Current, High- and Low-Side, Gate-Drive ICedge.rit.edu/edge/P10022/public/team_docs/parts... · high-side driver under high dv/dt noise circumstances. An advanced level-shift

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.comFAN7392 Rev. 1.0.2 17

FAN

7392 — H

igh-Current, H

igh- and Low-Side, G

ate-Drive IC

Physical Dimensions (Continued)

.

Figure 40. 16-Lead Small Outline Package (SOP)

Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any mannerwithout notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify orobtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products.

Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:http://www.fairchildsemi.com/packaging/.

pdip8_dim.pdf

2.65 MAX

M16BREV2

0.20±0.10

0.10 C

C

10.30±0.20 A

SEE DETAIL A

0.330.20

NOTES: UNLESS OTHERWISE SPECIFIED

A) THIS PACKAGE CONFORMS TO JEDEC MS-013, ISSUE E, DATED SEPT 2005.

B) ALL DIMENSIONS ARE IN MILLIMETERS. C) DIMENSIONS DO NOT INCLUDE MOLD FLASH OR BURRS.

D) LANDPATTERN STANDARD: SOIC127P1030X265-16L

9.44

PIN ONEINDICATOR

0.25

1

1.270.510.35

8

BC AM

10.325

16 9

8.890

7.50±0.10

B

X 45°0.750.25

(R0.10)

(R0.10)

0.40~1.27

8°0°

SEATING PLANE

(1.40)

0.25

GAGE PLANE

DETAIL ASCALE: 2:1

SEATING PLANE

1.27 TYP

0.55 TYP

LAND PATTERN RECOMMENDATION

1.75 TYP

9.2 10.95

E) DRAWING FILENAME: MKT-16Brev2

Page 18: FAN7392 High-Current, High- and Low-Side, Gate-Drive ICedge.rit.edu/edge/P10022/public/team_docs/parts... · high-side driver under high dv/dt noise circumstances. An advanced level-shift

FAN

7392 — H

igh-Current, H

igh- and Low-Side, G

ate-Drive IC

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.comFAN7392 Rev. 1.0.2 18