LED Streetlight APEC Demo Performance_SMappus 03062013 AC 12 Mar 2013

www.fairchildsemi.com 1

Steve Mappus,

March 08, 2013

100W, PFC, CCCV, 4-Channel, LED Power Supply


100W PFC, LED Power Supply Specification

Primary Design Goals

1. Wide Input 80VAC<VIN<310VAC

2. Maximize Wide Range Efficiency

3. Configurable for Single Channel or 4-Channel LED

Operation

4. Compatible with 0V-10V Analog Dimming and 0%-100%

PWM Dimming

5. Lowest Possible Design Profile

Intended Application

1. Street, Parking Lot & Highway Lighting

2. Industrial High-Bay Lighting

FL7930C BCM PFC

MIN TYP MAX

VIN_AC 90V 120V 310V

FVIN_AC 50Hz 60Hz 65Hz

VOUT_PFC 440V 450V 460V

VOUT_PFC (Boost Follower) 245V VINPK+40V 470V

VOUT_PFC_RIPPLE 10V

POUT_PFC 120W

FSW_PFC 35kHz 300kHz

tSOFT_START 200ms 250ms

η_PFC_120V 96% 96.5%

η_PFC_230V 97% 97.5%

PF_120V 0.996

PF_230V 0.975

FAN6300H 2-Switch Flyback, CCCV Converter

MIN TYP MAX

VIN 240V 470V

VOUT_LED 30V 62V

POUT 100W

IOUT 2A

FSW 30kHz 120kHz

D 20% 45%

η_250V 94%

η_450V 93%

FAN7346 4 Channel LED Current Balance Controller

VOUT_LED 30V 62V

VOUT_OVR 65V

POUT 87W

IOUT_4CH 0A 350mA/CH

AnalogDIM 13% 100%

PWMDIM 0% 100%

Total System

VIN_AC 90V 120V 310V

FVIN_AC 50Hz 60Hz 65Hz

tSOFT_START 100ms 150ms

η_120V 90% 91%

η_230V 91% 91.6%

PF_120V 0.996

PF_230V 0.975

tR(VOUT) 30ms 50ms

IOUT_4CH 0A 350mA/CH

VOUT_LED 30V 62V

VOUT_OVR 65V

Mechanical and Thermal

Height 24mm

θJC 60⁰C


Fairchild Featured Content

CONTROLLERS

1. FL7930C, Single Stage Flyback and Boundary-Mode PFC Controller for Lighting

2. FAN6300H, Highly Integrated Quasi-Resonant Current Mode PWM Controller

3. FAN7346, 4-Channel LED Current Balance Controller

4. FSL138MRT, Green-Mode Fairchild Power Switch for High Input Voltage (800V)

GATE DRIVERS

1. FAN7832, HVIC High-Side, Low-Side Gate Driver

2. FAN3111C, Single 1A High-Speed, Low-Side Gate Driver

DISCRETE

1. FCP190N60E, 600V, SuperFET 2, N-Channel MOSFET

2. FDP22N50N, 500V, UniFET 2, N-Channel MOSFET

3. FDT86256, 150V, PowerTrench, N-Channel MOSFET

4. 2N7002K, N-Channel Enhancement Mode Field Effect Transistor

5. ES3J, 600V, 3A, Ultrafast Recovery Rectifier

ANALOG

1. KA431A, Programmable Shunt Regulator

2. FOD817A, High Operating Temperature Phototransistor Optocoupler

3. FAN4274, Dual Rail-to-Rail I/O, CMOS Amplifier

4. LM393, Dual Differential Comparator

5. LM555, Single Timer


Power Board Partitioning

1 2

3

4

5

6 7

1. AC Input, EMI Filter, Inrush Current Limiting

2. Flyback Bias Regulator

3. BCM PFC

4. 2-Switch Flyback

5. Removable Controller Card (4-Channel Controller Shown)

6. PWM Dimmer Circuits

7. LED Output Terminal Block


Power Board Dimensions

228.6mm

76.2mm

25mm


LED Current Controller Cards

OR

4-Channel, 60V, 350mA per Channel Single Channel, 50V, 2A

J19 J23


FL7930C Features

• VMC with ZCD

• ZVS when VIN<VOUT/2

• 150µs Restart Timer

• 300kHz Frequency Clamp

• 5ms Internal Soft Start

• Cycle-by-Cycle Current Limit

• Open Feedback Protection

• PFC RDY Function

• 8-Pin Small Outline Package

(SOP)

FL7930C

Single Stage Boundary-Mode PFC Controller

VCC

ZCD

VTH(ZCD)

VCC

OUT

+

-

S

QR

Q

+

-INV 1

5

COMP 3

Clamp Circuit

+

-VCS_LIM

40kW

8pF

4 CS

0.450.35

disable

2.6752.5

disable

+

-

VZ

+

-

VTH(S/S)

128.5

VO(MAX)

VCC

2.5VREF

Internal Bias

VBIAS

VREF

Gate

Driver

Restart Tmer

7

8

6 GND

+

-

INV_openOVP

RDY 2

reset

reset

H:open

Thermal Shutdown

fMAX Limit

VREF

Overshoot

Prevention

VREF Stair Step

Cla

mp

Circu

it

THD

Optimized

Sawtooth

Generator

VIN Absent

VCC

2.882.5

disable

VREF

Control Range

Compensation

UVLO FL7930C


FAN6300H Features • High Voltage Start-Up

• Quasi-Resonant Extended Valley Detection

• Peak Current Mode Control

• Leading Edge Blanking

• 5ms Internal Soft Start

• Latching OVP (DET)

• Open Feedback Loop Protection

• Programmable Over Current Protection

• 8-Pin Small Outline Package (SOP)

FAN6300H Quasi-Resonant Current Mode PWM Controller

C S

8 6

2

3

1

4 7

5

0 .3 V

D R V

GN D

V D D

Tw o Steps

U VLO16 V/10 V/ 8V

InternalBias

Latched

18 V

GA TE

D E T

FB

N C

H V

Latched

4 .2V

2 R

R

Soft -Star t

5 m s

PW MC ur rent Lim it

I D ET

Internal

OTPLatched

S/ H

Blanking

C ircuit

tO FF - M IN

ID ET

5V

D ET OVP

2. 5V

tO FF

Blanking

Q

QS E T

C L R

S

R

FB OLPT im er52 m s

Over -Pow er

C om pensation

VD ET

Star ter

30 µs

Latched

ValleyD etector

0.3 V

27 V

OVP

V D ET

IH V

tT IM E -O U T

2 .1m s


FAN7346 Features

• Current Sharing Accuracy

Trimmed to 1.5%

• Individual Channel 0% to

100% PWM Dimming

• 0V to 10V Analog

Dimming

• Error Flag Output

• Programmable LED OVP

• Individual Channel Open

LED Protection

• Individual Channel Short

LED Protection

• Individual Channel OCP

• Master Slave Configurable

• 28-Pin SOIC

FAN7346

4-Channel LED Current Balance Controller

OU

T1

FB

1

FB

2

OU

T3

OU

T2

FB

3

OU

T4

FB

4

CH

4

CH

3

CH

2

CH

1

GN

D

PW

M1

FB

VDD

OVR

VREF

+ -

ch1 ch2 ch3 ch4

5V, max. 3mA

UVLO 9.5V

Voltage Reference

& Internal Bias

-

+

Hysteresis 1.0V

1.2V-

+

200k

VCC

ENA

REF

On/Off

ADIM

VLREF=VADIM/10P

WM

2

PW

M3

PW

M4

CMP

- +

1.42V

OVR

+-

1V

OCP (latched)

Sampling & Hold

Channel Voltage

at PWM_off

Internal Soft Start: 10ms

Current increases gradually

All Protection disable

(except OCP)

PWM is full duty

8.5V

Feedback Circuit

(Ref = 1V)

Clamped 0.5~4VPWM On/Off

Rising/Falling Time =

400ns/150ns

400ns 150ns

FO

PWM1

PWM2

PWM3

PWM4

VREF

+ -

+-

1V

OCP (latched)

VREF

+ -

+-

1V

OCP (latched)

VREF

+ -

+-

1V

OCP (latched)

ch# Minimum

Detector

Min.

ch.V/10

SL

PR

SLP(20µs count)

+-

Individual by

each channel

Protection

Control

Block

ch.V

+-

0.3V

OLP(20µs count)

CH# = 5V

(remove from feedback)

PWM# = off

(reset in PWM# rising edge)

OLP/OCP

SLP/OCP

VM

IN

ch1 / ch2 / ch3 / ch4

Enable ON

Enable OFF

0.5V 4.0V

OLP, SLP, OCP Protection

Error Flag


FSL138MRT Features

• Internal 800V SenseFET

• High Voltage Start-Up

• Internal 15ms Soft Start

• 70kHz Fixed Frequency

• Pulse by Pulse Current

Limit

• 350ns LEB

• Overload Protection

• Overvoltage Protection

• 6-Lead Formed TO-220F

FSL138MRT

Green-Mode, High Input Voltage FPS


Power Board Schematic

PFC, Boost Follower Enable, Inrush Limit

BOOST FOLLOWER

1. OFF=450V

2. ON=BF

3. OPEN=250V



2-Switch Flyback, PWM Dimmers



High-Voltage Flyback Bias Power Supply

• 80VAC<VIN<300VAC

• Primary Referenced, PBIAS~15V, 0.5A

• Secondary Referenced, SBIAS=12V, 0.5A


Controller Daughter Card Schematic

Single String CCCV LED Controller

• Sources Current into Optocoupler Anode (OPTO_A)

• Constant LED Current set to 2A

• Constant LED Voltage set to 50V


Controller Daughter Card Schematic

4-Channel LED Controller

• Sinks Current Through Optocoupler Cathode (OPTO_C)

• Constant LED Current set to 350mA

• Over-Voltage Regulation (OVR) set to 62V

PDIM

1. OFF=5V

2. ON=PWM DIM


BCM PFC Boost

FL7930, FAN3111C, FCP190N60E, ES3J

BOOST FOLLOWER

1. OFF=450V

2. ON=BF

3. OPEN=250V


• VIN=115VAC

• VOUT=450V

• POUT=120W

• PF=0.991

BCM PFC AC Input Waveforms CH2=VIN(AC), CH4=IIN(AC)

• VIN=230VAC

• VOUT=450V

• POUT=120W

• PF=0.979


• VIN=115VAC

• VOUT=450V

• ZVS; VIN(PK)<VOUT/2

• FS=175kHz

• POUT=120W

BCM PFC Switching Waveforms CH1=VGS, CH2=VDS, CH4=IL

• VIN=230VAC

• VOUT=450V

• Valley Switching; VIN(PK)>VOUT/2

• FS=250kHz

• POUT=120W


• VOUT=450V (constant) to cover 80VAC<VLINE<310VAC when the Boost Follower is not used

• VOUT(BF) tracks VIN for VIN >140VAC when Boost Follower is used

• Boost Follower VOUT=250V to 460V

• Downstream DC/DC Converter Designed for 250V<VIN<460V

BCM PFC Boost Follower

0

50

100

150

200

250

300

350

400

450

500

80 130 180 230 280

Vo

ltag

e (

VD

C)

AC Line Voltage (VRMS)

VOUT(PFC)

Vin(pk)

Non BF


• Benefit to FL7930C PFC

• VIN=120VAC

• VOUT(BF)=250V to 460V

• Combined with DC/DC Downstream Converter, Boost Follower Yields about 1%-2% Efficiency Improvement

BCM PFC Boost Follower Efficiency Benefit

• Benefit to FAN6300H DC/DC

• VIN=VOUT(BF)=250V to 470V

• 250VIN corresponds to 120VAC

• POUT=70W (LED Load)

• Without Boost Follower, VIN=450V (constant) for 80VAC<VLINE<310VAC

90%

95%

100%

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

Eff

icie

ncy (

%)

Output Power (%)

FL7930C PFC Efficiency (120VAC Input, 100%=120W)

Boost Follower

450V

90%

95%

100%

250 270 290 310 330 350 370 390 410 430 450 470

Eff

icie

ncy (

%)

Input Voltage (VDC)

FAN6300H 2-SW Flyback Efficiency (DC Input, 50V, 4x350mA, 70W)

93.34%,

450V

250VDC=120VAC

94.02%,

250V


• VIN=Step 115VAC to 300VAC


• POUT=60W

BCM PFC Boost Follower Voltage Tracking CH1=VIN(AC), CH2=VOUT(BF)

• VIN=Step 300VAC to 115VAC


• POUT=60W


• Electronic Load used for POUT of PFC stage only.

• LED Power is constant and should operate within 50%<PPFC<90%

of this PFC stage

BCM PFC Boost Follower PFC stage only

0.80

0.85

0.90

0.95

1.00

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

Po

wer

Facto

r

Output Power (%)

FL7930C Power Factor (120W, PFC Section Only)

120VAC

230VAC LED Power Range


2-Switch Flyback FAN6300H, FAN7382, FDP22N50N, FOD817A

• FAN6300H Bias comes from FL7930C, RDY Signal

• FAN7382 Bias comes from FSL138MRT, PBIAS Output

• Feedback Control (OPTP_A, OPTO_C) comes from either:

Single String CCCV LED Controller Card

FAN7346 4-Channel LED Controller Card


• VDD Reaches 16V (VDD(ON)) and HV>50V, Switching Starts and VDD Begins to Fall to RDY level Bias (12V)

• FB is HIGH (5V) when Switching Begins

• If FB>4.2V for >55ms, Open Feedback Protection is Enabled and Switching Stops

• VIN(AC)=120VAC

• VIN=VOUT(PFC)=250V

• POUT=70W (50V, 4x350mA)

2-Switch Flyback Start-Up Waveforms CH1=HV, CH2=VDD, CH3=GATE, CH4=FB or VLED

• LED Output Voltage rises smoothly

with no overshoot

• FS=68kHz

• POUT=70W (50V, 4x350mA)


• VIN(AC)=120VAC


• D=40%

• FS=65kHz

• POUT=70W (50V, 4x350mA)

2-Switch Flyback Switching Waveforms CH1=VGS(LO), CH2=VGS(HO), CH3=VCS, CH4=VFB

• VIN(AC)=300VAC


• D=23%

• FS=95kHz

• POUT=70W (50V, 4x350mA)


• VIN(AC)=120VAC


• D=40%

• FS=65kHz

• POUT=70W (50V, 4x350mA)

• VDS Always Valley Switching for Constant Load

2-Switch Flyback Switching Waveforms CH1=VGS(LO), CH2=VDS(LO)

• VIN(AC)=300VAC


• D=23%

• FS=95kHz

• POUT=70W (50V, 4x350mA)

• VDS Always Valley Switching for Constant Load


• VDS Valley Switching on First Valley

• VIN(AC)=120VAC


• D=42%

• FS=63kHz

• POUT=85W (60V, 4x350mA)

2-Switch Flyback Switching Waveforms CH1=VDS(LO), CH3=VGS(LO)

• VDS Extended Valley Switching

• VIN(AC)=120VAC


• D=11%

• FS=68kHz

• POUT=24W (Dim, 60V, 4x100mA)


• VIN=VOUT(PFC) operating as Boost Follower

• POUT=70W

• VOUT=50V (4-Channels, 18 LEDs per channel)

• IOUT=1.4A (4-Channels, 350mA each)

FAN6300H, 2-Switch Flyback Efficiency

90%

95%

100%

250 270 290 310 330 350 370 390 410 430 450 470

Eff

icie

ncy (

%)

Input Voltage (VDC)

FAN6300H 2-SW Flyback Efficiency DC Input, 70W (50V, 4x350mA)


High Voltage, Flyback Bias Regulator FSL138MRT, FOD817A

• 67kHz Fixed Frequency Operation

• Internal 800V SenseFET

• Supplies Primary Bias (PBIAS) and Secondary Bias (SBIAS) to System


• VIN(AC)=120VAC

• When VSTR reaches 12V,

Switching Begins

• VSTR must be 26V During

Steady State Switching

High Voltage, Flyback Bias Regulator, Start-Up CH1=VDS, CH2=VCC or VSTR, CH3=SBIAS, CH4=PBIAS

• VIN(AC)=120VAC

• VCC Supplied from Flyback

Transformer Bootstrap

Winding (PBIAS)


• VIN(AC)=120VAC

• SBIAS=12V, <100mA

• PBIAS=15V, <100mA

• RDY is generated from PBIAS and must be > 11V at FAN6300H VDD

High Voltage, Flyback Bias Regulator, Burst Mode CH1=VDS, CH2=VCC, CH3=SBIAS, CH4=PBIAS

• VIN(AC)=120VAC

• Always Operates in Burst Mode

(VFB<0.5V) due to Constant

Light Load (POUT<2W)

• Fixed Frequency Operation

Means no VDS Valley Switching


4-Channel LED Controller

FAN7346, FDT86256

• Sinks Current Through Optocoupler Cathode (OPTO_C)

• Constant LED Current set to 350mA

• Over-Voltage (OVR) set to 62V

PDIM

1. OFF=5V, (No

PWM Dim)

2. ON=PWM DIM


• 2V<VDIM(PWM)<5V

• VDIM(OFF)=0.8V

• 100Hz<FPWM<500Hz

• FAN7346 can PWM Dim Each LED Channel Independently

• Demo Includes 2, On-Board PWM Dimmers Operating from 1% to 100% Duty Cycle

• PWM Dimming is linear from 0% (barely on) to 100% (full brightness)

• Full LED-Off at <1% Duty Cycle Requires <0.8V (no pulse), Achievable by µC or Analog Comparator

• FAN7346 Automatically Disables Open LED Protection (OLP) and Short LED Protection (SLP) for any given Channel during PWM Dimming

FAN7346 PWM Dimming

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

Perc

en

t M

ax L

ED

Cu

rren

t (%

)

PWM Dimming Duty Cycle (%)

PWM Dimming (120VAC, 250Hz, 3.3VDIM, 50V, 4x350mA, 70W)


• PWM Dimming “Chops” LED DC Current

• FPWM=250Hz

• DCH1=DCH2=50%, DCH3=10%, DCH4=100%

• ILEDCH1=ILEDCH2=35mA

• ILEDCH3=176mA

• ILEDCH4=350mA

• PIN=35.1W

• POUT=30.5W

• η=87.02%

• PF=.971 during Dimming

FAN7346 PWM Dimming CH1=PWMCH3, CH2=PWMCH1_CH2, CH3=ILEDCH3, CH4=ILEDCH1_CH2

• 2,On-Board PWM Dimmers, set Power Board Jumpers J17, J21 to “ON” and set J101, J103, J104 J105 to “ON”

• PDIM1 Controls Channels 1, 2

• PDIM2 Control Channels 3, 4

• FPWM=250Hz, 1%<D<100%

• VPWM=5V

• Set J17, J21 to “OFF” to disable PWM Dimming or Apply External PWM Dimming Signal


FAN7346 Analog Dimming

+

-

VADIM/10

VOUT

Vds

Vf

Vsense

Vg

1V

Cc

Rc

Gm

OVR

FB

VD1

VD2

VD_MIN

COMI

Force power PWM off

Headroom Control Feedback Block

(Min VDx = 1V)

Current Balance Block

LEDx Current = VADIM/(10*Rs)

• Each LED String is Terminated with an External MOSFET and CS (Current Sensing) Resistor

• The Voltage across the CS Resistor is the Inverting Input of an Internal LED Comparator

• The Comparator Reference Voltage is Set by a Scaled (VADIM/10) DC Voltage

• ADIM Voltage is Clamped to 0.5V<VADIM<4V

• When Analog Dimming is not Desired, the Applied ADIM Voltage should be at least 5V (Internally Clamped to 4V) for Full LED Brightness

• Design Feedback to Control Minimum Drain Voltage to 1V

• Control LED Current of each String by Varying VGS and VDS


• 0.5V<VADIM<5V

• Analog Dimming Range is 8:1 (4V/0.5V)

• Analog Dimming Function Dims all LED Channels Simultaneously while Maintaining Equal LED Current Balance

• Can Not Dim to 0% (Full-Off) due to Minimum Internal Analog Dimming Voltage (VREF) Clamped at 0.5V

FAN7346 Analog Dimming

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

Perc

en

t M

ax L

ED

Cu

rren

t (%

)

Dimming Voltage (VDC)

Analog Dimming (120VAC, 50V, 4x350mA, 70W)


• OVR (Over-Voltage Regulation) set to ~52V for 50V, 4x350mA (70W) Operation to meet 50V Specification

• OVR set to ~62V for 60V, 4x350mA (85W) Operation to allow 100% Illumination (88 LEDs) of LED Load Module

• VLED(MIN)=31V

FAN7346 CCCV Operation

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

30 35 40 45 50 55 60

Ou

tpu

t L

ED

Cu

rren

t (A

DC

)

Output LED Voltage (VDC)

CCCV (120VAC, 50V, 4x350mA, 70WMAX)


System Performance

• LED Load Module

• AC Input Line Voltage and Current

• Start-Up Bias Sequence

• Inrush Current

• Measured THD

• Measured System Efficiency

• Measured Power Factor


HB LED Load Module

• 4 Independent LED Strings

• 22, Cree XLAMP, 3A HB LEDs

per String

• 66VMAX per String

• 3AMAX per String (Fan Cooling)

• 4 Configurable Series Strings

(88 LEDs) Supports up to 264V


Cree XLAMP, 3A HB LED XMLAWT-00-0000-0000T6051


• VIN(AC)=120VAC

• VOUT(PFC)=250V

• POUT=70W (50V, 4x350mA)

• PF=0.995

AC Input Line Voltage and Current CH1=VIN(AC), CH2=IIN(AC)

• VIN(AC)=230VAC

• VOUT(PFC)=400V

• POUT=70W (50V, 4x350mA)

• PF=0.938


• Start-Up Sequence

• VIN(AC)=120VAC

• VOUT(PFC)=250V

• POUT=70W (50V, 4x350mA)

• PBIAS; FL7930C, FAN7382

• SBIAS; FAN7346

• VOUT(PFC)>0.89×VOUT(PFC), RDY Signal HIGH

• RDY Signal Applies PBIAS to FAN6300H and Disables Inrush Current Limiter

• VLED Rises, LEDs Illuminate

Bias Sequence CH1=PBIAS, CH2=RDY, CH3=VOUT(PFC), CH4=VLED

• Shut-Down Sequence

• VIN(AC)=120VAC

• VOUT(PFC)=250V

• POUT=70W (50V, 4x350mA)

• VOUT(PFC)<0.89×VOUT(PFC), RDY Signal LOW

• RDY Signal Disables PBIAS to FAN6300H and Enables Inrush Current Limiter

• VLED Slowly Discharges


• NTC R7 and R12 Limit Inrush to 3.18A During Start-Up

• VIN(AC)=120VAC

• VOUT(PFC)=250V

• POUT=70W (60V, 4x350mA)

• PBIAS sets 5VREF (D5) at U1-2, Comparator Output is LOW

• RDY Signal (12V) Applied to U1-3, Comparator Output is HIGH, Relay Shorts Across R7+R12 to Maintain High

Efficiency During Steady State Operation

• Relay Shorting Time can be Further Adjusted by R16, C10

• Relay Short is Removed during Power Supply Turn-Off

Inrush Current Limiting CH1=VIN(AC), CH2=IIN(AC), CH3=VLED


• Inrush Circuit Enabled

• VIN(AC)=120VAC

• VOUT(PFC)=250V

• POUT=70W (60V, 4x350mA)

• Peak Inrush Current is 3.18A

• Reduces Inrush Current by 79.15%

Inrush Current Limiting Comparison CH1=VIN(AC), CH2=IIN(AC), CH3=VLED

• Inrush Circuit Disabled

• VIN(AC)=120VAC

• VOUT(PFC)=250V

• POUT=70W (60V, 4x350mA)

• Peak Inrush Current is 15.25A


Measured THD Chroma 61502 Programmable AC Source

0

0.05

0.1

0.15

0.2

0.25

0.3

3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39

Ha

rmo

nic

C

urr

en

t (A

)

Harmonic Number

EN61000-3-2, 115VAC, 85W (4x350mA)

Measured Harmonic Current

Class C (Lighting) Limit

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39

Harm

on

ic

Cu

rren

t (A

)

Harmonic Number

EN61000-3-2, 230VAC, 85W (4x350mA)

Measured Harmonic Current

Class C (Lighting) Limit

• VIN(AC)=115VAC

• VOUT(PFC)=250V

• POUT=85.41W (60V, 4x350mA)

• PIN=93.8W

• η=91.05%

• THD=8.91%

• Easily Passes EN61000-3-2, Class C, Lighting Equipment PIN>25W

• VIN(AC)=230VAC

• VOUT(PFC)=400V

• POUT=86.2W (60V, 4x350mA)

• PIN=94.2W

• η=91.51%

• THD=21.52%

• Barely Passes EN61000-3-2, Class C, Lighting Equipment PIN>25W

• EMI Filter not Optimized


Measured System Efficiency

• 91.7% Peak Total System Efficiency includes EMI Filter and Flyback Bias

• Boost Follower PFC shows 1.2% Peak Efficiency Gain Compared to Fixed Output PFC

• Slight Drop in High Line Efficiency Caused by Boost Follower Output Voltage being 470V at VIN(AC)=300VAC, Compared to 450V Fixed PFC Output Voltage

• 91.7% Peak Total System Efficiency

includes EMI Filter and Flyback Bias

• Both Cases Shown Operating with PFC

Boost Follower

85%

90%

95%

80 100 120 140 160 180 200 220 240 260 280 300

Eff

icie

ncy (

%)

Input Voltage (VAC)

Boost Follower Comparison 61V, 4x350mA, 85W

450V

Boost Follower

80%

85%

90%

95%

100%

80 100 120 140 160 180 200 220 240 260 280 300

Eff

icie

ncy (

%)

Input Voltage (VAC)

POUT Comparison

70W, 50V, 4x350mA

85W, 60V, 4x350mA


Measured System Power Factor

• Peak PF=.996 for Low-Line Voltage

• Boost Follower PFC

• Fixed 450V PFC Output shows Identical

PF verses Input Voltage

• PF>0.9, for entire Range of VIN(AC)

• Boost Follower PFC

• Fixed 450V PFC Output shows Identical

PF verses Input Voltage

0.85

0.90

0.95

1.00

80 100 120 140 160 180 200 220 240 260 280 300

Eff

icie

ncy (

%)

Input Voltage (VAC)

50V, 4x350mA, 70W

0.850

0.900

0.950

1.000

80 100 120 140 160 180 200 220 240 260 280 300

Eff

icie

ncy (

%)

Input Voltage (VAC)

61V, 4x350mA, 85W

LED Streetlight APEC Demo Performance_SMappus 03062013 AC 12 Mar 2013

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Transcript of LED Streetlight APEC Demo Performance_SMappus 03062013 AC 12 Mar 2013