Fuji Electric FA5502P Montage- und Bedienungsanleitung

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FA5502P/M

FUJI Power Supply Control IC

Power Factor Correction

FA5502P/M

Application Note

June `02

Fuji Electric Co., Ltd.

Matsumoto Factor

y

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FA5502P/M

1.This Data Book contains the product specifications, characteristics, data, materials, and

structures as of June 2002. The contents are subject to change without notice for specification

changes or other reasons. When using a product listed in this Data Book, be sure to obtain the

latest specifications.

2. All applications described in this Data Book exemplify the use of Fuji's products for your

reference only. No right or license, either express or implied, under any patent, copyright, trade

secret or other intellectual property right owned by Fuji Electric Co., Ltd. is (or shall be deemed)

granted. Fuji makes no representation or warranty, whether express or implied, relating to the

infringement or alleged infringement of other's intellectual property rights which may arise from

the use of the applications described herein.

3. Although Fuji Electric is enhancing product quality and reliability, a small percentage of

semiconductor products may become faulty. When using Fuji Electric semiconductor products in

your equipment, you are requested to take adequate safety measures to prevent the equipment

from causing a physical injury, fire, or other problem if any of the products become faulty. It is

recommended to make your design fail-safe, flame retardant, and free of malfunction.

4.The products introduced in this Data Book are intended for use in the following electronic and

electrical equipment which has normal reliability requirements.

• Computers • OA equipment • Communications equipment (terminal devices)

• Measurement equipment • Machine tools • Audiovisual equipment

• Electrical home appliances • Personal equipment • Industrial robots, etc.

5.If you need to use a product in this Data Book for equipment requiring higher reliability than

normal, such as for the equipment listed below, it is imperative to contact Fuji Electric to obtain

prior approval. When using these products for such equipment, take adequate measures such

as a backup system to prevent the equipment from malfunctioning even if a Fuji's product

incorporated in the equipment becomes faulty.

• Transportation equipment (mounted on cars and ships) • Trunk communications equipment

• Traffic-signal control equipment • Gas leakage detectors with an auto-shut-off feature

• Emergency equipment for responding to disasters and anti-burglary devices • Safety devices

6. Do not use products in this Data Book for the equipment requiring strict reliability such as

(without limitation)

• Space equipment • Aeronautic equipment • Atomic control equipment

• Submarine repeater equipment • Medical equipment

reproduced in any form or by any means without the express permission of Fuji Electric.

8. If you have any question about any portion in this Data Book, ask Fuji Electric or its sales

agents before using the product. Neither Fuji nor its agents shall be liable for any injury caused

by any use of the products not in accordance with instructions set forth herein.

WARNING

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FA5502P/M

CONTENTS

page

1. Description • • • • • • • • • • • • • • • 4

2. Features • • • • • • • • • • • • • • • 4

3. Outline • • • • • • • • • • • • • • • 4

4. Block diagram • • • • • • • • • • • • • • • 5

5. Pin assignment • • • • • • • • • • • • • • • 5

6. Ratings and characteristics • • • • • • • • • • • • • • • 6

7. Characteristic curves • • • • • • • • • • • • • • • 9

8. Description of each circuit • • • • • • • • • • • • • • • 13

9. Design advice • • • • • • • • • • • • • • • 18

10. Example of application circuit • • • • • • • • • • • • • • • 23

Note

• Parts tolerance and characteristics are not defined in all application described in this Data book. When design an

actual circuit for a product, you must determine parts tolerances and characteristics for safe and economical

operation.

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FA5502P/M

1. Description

FA5502P/M is a control IC for a power factor correction system. This IC uses a CMOS device with high dielectric

strength (30V) to implement low power consumption. This IC uses the average current control system to ensure stable

operation. With this system, a power factor of 99% or better can be achieved.

2. Features

• Low current consumption by CMOS process

• Stand-by : 3µA(max), Start-up : 30µA(max), Operating : 4mA(typ)

• Good regulation of PFC output voltage from no-load to full-load

• Drive circuit for connecting a power MOSFET(IOUT = ±1.5A)

• Pulse-by-pulse overcurrent and overvoltage limiting function

• ±2% accuracy reference voltage for setting DC output and overvoltage protection

• Output ON/OFF control function by external signal

• External synchronizing input pin for synchronous operation with other circuits

• Undervoltage lockout function (ON:16.5V, OFF:8.9V)

• 16-pin package (DIP/SOP)

3. Outline

DIP-16 (FA5502P) SOP-16 (FA5502M)

6.5 ± 0.2

0.3 ± 0.1

7.6 ± 0.2

4.0 ± 0.3

16

1

7.3 ± 0.5

1.5 ± 0.3

2.54 TYP 0.5 ± 0.1

3.4 ± 0.1

19.4 ± 0.3

9

8

17.78 ± 0.3

0º - 15º

0.75 ± 0. 1

1.80 ± 0.05

5.3 ± 0.1

1.27

10º-0º

0.08

0.40 ± 0.05

0.10 ± 0.10 7.8 ± 0.2

10.2 ± 0.1

18

916

0.15 ± 0.05

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FA5502P/M

4. Block diagram

+

--

+

R

SQ

S

MUL

OCP.COMP

PWM.COMP

OVP.COMP

ER.AMP

CUR.AMP

OSC

UVLO REF

ON/OFF

IDET(16) IFB(1) IIN-(2) VDET(3)

OVP

(4)

VFB

(5)

VIN-

(6)

GND

(7)

OUT

(8)

VC

(9)

ON/OFF(12)

VCC(10)

REF(13)

CS(11)

CT(15)

SYNC

(14)

11µA

1.55V

1.64V

1.55V

11k

15k

4.85k

0.39V

5V

16.5V/8.9V

3.95V/

2.8V

5. Pin assignment

Pin No. Symbol Function Description

1 IFB Current error amplifier

output

Output of current error amplifier to connect

compensation network

2 IIN- Inverting input to current

error amplifier

Inverting input of current error amplifier to

connect compensation network

3 VDET Multiplier input Input of multiplier to detect sinusoidal

waveform

4 OVP Overvoltage protection

input

Input to overvoltage protection circuit

5 VFB Voltage error amplifier

output

Output of voltage error amplifier to connect

compensation network

6 VIN- Inverting input to voltage

error amplifier

Inverting input to voltage error amplifier to

detect PFC output voltage

7 GND Ground Ground

8 OUT Output Output for direct driving a power MOSFET

9 VC Power supply to output

circuit

Power supply to output circuit

10 VCC Power Supply Power supply for IC

11 CS Soft-start A pin to connect a capacitor for soft-start

12 ON/OFF Output ON/OFF control

input

Input of ON/OFF control circuit

13 REF Reference voltage Reference voltage output

14 SYNC Oscillator synchronization

input

Input of synchronization signal

15 CT Oscillator timing capacitor

and resistor

A pin to connect timing capacitor and

resistor to set oscillation frequency

16 IDET Non-inverting input to

current error amplifier

Input of inductor current signal

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FA5502P/M

6. Ratings and characteristics

The contents are subject to change without notice. When using a product, be sure to obtain the latest

specifications.

(1) Absolute maximum ratings

Item Symbol Rating Unit

VC pin VCVcc V

VCC pin

Low impedance source

(Icc>15mA)

VCC1 30 V

Supply

Voltage

VCC pin

Internal zener clamp voltage

(Icc<15mA)

VCC2 Self Limiting V

Output peak current IOUT ±1.5 A

SYNC,VIN-,VDET and OVP pins

Input voltage

VSYNC

VVIN-

VVDET

VOVP

-0.3 to 5.0 V

IDET pin input voltage VIDET -10 to 5.0 V

ON/OFF pin input voltage VON/OFF -0.3 to Vcc V

REF pin source current IREF -10 mA

DIP-16 Pd 850 mWPower dissipation (Ta=25ºC)

SOP-16 650 mW

Ambiance temperature Ta -30 to +105 °C

Maximum junction temperature Tj +150 °C

Storage temperature Tstg -40 to +150 °C

Note) VC and ON/OFF pins voltage must be less than or equal to VCC pin voltage in all the conditions.

Peak current at OUT pin may flow to rated value neither according to supply voltage nor temperature conditions.

Maximum dissipation curve

-30 25 105 150

650mW(SOP)

850mW(DIP)

Maximum power

dissipation

Ambience temperature Ta(ºC)

(2) Recommended operating conditions

Item Symbol MIN TYP. MAX Unit

Supply voltage Vcc,Vc 10 28 V

IDET pin input voltage VIDET -1.0 0 V

VDET pin input voltage VVDET 0 2.4 V

VDET pin peak input voltage VPVDET 0.65 2.4 V

Oscillation frequency fOSC 15 150 kHz

Oscillation timing capacitance CT330 1000 pF

Oscillation timing resistance RT10 75 kΩ

Noise filter resistance connected to IDET

Rn 0 27 Ω

REF-GND capacitance Cref 0.1 0.47 µF

Note) If the synchronous operation is not necessary, connect the SYNC pin to GND.

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FA5502P/M

(3) Electrical Characteristics (Unless otherwise specified, Vcc=Vc=18V, Ta=25°C, CT=470pF, RT=22kΩ)

Reference voltage section (REF pin)

Item Symbol Condition MIN TYP MAX Unit

Output voltage VREF 4.8 5 5.2 V

Line regulation Vrdv Vcc=10 to 28V ±25 mV

Load regulation Vrdi ILoad=0.1 to 2mA -50 -25 mV

Temperature stability VrdTTa=-30 to 105°C ±0.5 mV/°C

Oscillator section (CT, SYNC pin)

Item Symbol Condition MIN TYP MAX Unit

Oscillation frequency fOSC CT=470pF,

RT=22kΩ, Ta=25°C 71 78 85 kHz

Voltage stability fdv Vcc=10 to 28V ±1 ±3 %

Temperature stability fdTTa=-30 to +105°C ±0.04 ±0.07 %/°C

Output peak voltage VOSC 3.4 V

Synchronizing input

threshold voltage VTHSYNC SYNC pin voltage 1.0 1.5 2.0 V

SYNC pin input current ISYNC SYNC pin=2V 75 125

175 µA

Pulse width modulation circuit section (OUT pin)

Item Symbol Condition MIN TYP MAX Unit

Maximum duty cycle DMAX 91 94 97 %

Overcurrent limiter circuit section (IDET pin)

Item Symbol Condition MIN TYP MAX Unit

Input threshold voltage VTHOCP IDET pin voltage -1.20 -1.10 -1.00 V

Delay time TpdOCP 150 ns

Soft start circuit section (CS pin)

Item Symbol Condition MIN TYP MAX Unit

Charge current ICHG CS pin=0V -11 µA

VTHCS0 Dutycycle=0% 0.34 V

Input threshold voltage VTHCSM Dutycycle=DMAX 3.40 V

Output ON/OFF control circuit section (ON/OFF pin)

Item Symbol Condition MIN TYP MAX Unit

On-state input current ITHON ON/OFF pin=VTHON ±500 nA

VTHON OFF→ON 3.55 3.95 4.35 V

ON/OFF control

threshold voltage VTHOFF ON→OFF 2.40 2.80 3.20 V

Voltage error amplifier section (VIN-, VFB pin)

Item Symbol Condition MIN TYP MAX Unit

Reference voltage Vr 1.519 1.550 1.581 V

Line regulation Vredv Vcc=10 to 28V ±0.5 mV

Temperature stability VredTTa=-30 to 105°C ±0.2 mV/°C

Input bias current IBE ±500 nA

Open loop gain Ave 60 dB

VOE+ No load 3.7 4.1 V

Output voltage VOE- No load 50 200 mV

Output source current IOE+ VFB pin=0V -2.8 mA

Output sink current IOE- VFB pin=2V 280 µA

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FA5502P/M

Current error amplifier section (IIN-, IFB, IDET pin)

Item Symbol Condition MIN TYP MAX Unit

Input threshold voltage VTHIDET

VDET pin=0V

VFB pin=Vr

Rn=30Ω

-50 0 50 mV

Input bias current IBC IDET pin=0V -350 -250 -150 µA

Open loop gain Avc 60 dB

VOC+ No load 3.55 3.8 V

Output voltage VOC- No load 50 200 mV

Output source current IOC+ IFB pin=0V -5.1 mA

Output sink current IOC- IFB pin=2V 800 µA

Multiplier section (VDET, IIN-, VFB pin)

Item Symbol Condition MIN TYP MAX Unit

VDET pin input voltage VMVDET 0 2.4 V

VFB pin input voltage VMVFB 1.5 3.5 V

Input bias current IBVDET VDET pin=0V -1.5 -0.5 µA

Output current IMIIN- pin=0V -44 µA

Output voltage factor K -1.2 -

Overvoltage protection circuit section (OVP pin)

Item Symbol Condition MIN TYP MAX Unit

Input threshold voltage VTHOVP OVP pin voltage 1.607 1.640 1.673 V

VTHOVP/Vr ratio α1.037 1.058 1.079 -

Input bias current IBOVP OVP pin=0V -1.0 -0.3 µA

Delay time Tpdovp 150 ns

Undervoltage lockout circuit section (VCC pin)

Item Symbol Condition MIN TYP MAX Unit

Start-up threshold

voltage VTHUON 15.5 16.5 17.5 V

Shutdown threshold

voltage VTHUOFF 8.2 8.9 9.6 V

Hysteresis voltage VUHYS 6.8 7.6 8.4 V

Output circuit section (OUT, VC pin)

Item Symbol Condition MIN TYP MAX Unit

Low output voltage VOL I

OL=100mA 0.5 1.0 V

High output voltage VOH IOH=-100mA,

Vcc=18V 15.5 16.5 V

Rise time tr No load 50 ns

Fall time tf No load 50 ns

Power supply current (VCC pin)

Item Symbol Condition MIN TYP MAX Unit

Stand-by current ICCST Vcc=14V 3 µA

Starting-up current ICCSTA Vcc=start threshold 10 30 µA

Operating-state supply

current ICCOP No load 4 6 mA

OFF-state supply current ICCOFF ON/OFF pin=0V 80 200 µA

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FA5502P/M

7. Characteristic curves

(Unless otherwise specified, Vcc=Vc=18V, Ta=25°C, CT=470pF, RT=22kΩ)

Oscillation frequency (fosc) vs.

timing resistor (R

T

)

10

100

10 100

R

T

fosc(kHz)

C

T

=1000pF

C

T

=680pF

C

T

=470pF

C

T

=330pF

)k( Ω

Oscillation frequency(fosc) vs.

junction temperature(Tj)

75

76

77

78

79

80

-50050100150

Tj (°C)

fosc (kHz)

Maximum duty cycle(DMA X) vs.

Junction temperature(Tj)

90

91

92

93

94

95

-50050100150

Tj (°C)

DMAX (%)

Oscillation frequency(fosc) vs.

supply voltage(Vcc)

77.4

77.6

77.8

78.0

78.2

78.4

10 15 20 25 30

Vcc (V)

fosc (kHz)

Maximum duty cycle(DMA X) vs.

timing resistor(RT)

84

86

88

90

92

94

96

98

100

10 100

RT (kΩ)

DMAX (%)

CT=330pF

to 1000pF

Output duty cycle(D) vs.

CS pin voltage(VCS )

0

10

20

30

40

50

60

70

80

90

100

012345

VCS (V)

D (%)

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FA5502P/M

Multiplier input voltage(VVDET

) vs.

output voltage(VIIN- )

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

0123

VVDET (V)

VIIN-

(V)

VVFB=1.7V

VVFB=1.9V

VVFB=1.5V

VVFB=2.1V

VVFB=1.1V VVFB=0.5V

VVFB=2.4V

VVFB=2.9V

1.544

1.546

1.548

1.550

1.552

1.554

10 15 20 25 30

Vcc (V)

Vr (V)

Voltage error amplifier

reference voltage(Vr) vs. supply voltage(Vcc)

OVP input threshold voltage(VTHOVP) vs.

junction temperature(Tj)

1.61

1.62

1.63

1.64

1.65

1.66

-50 0 50 100 150

Tj (°C)

VTHOVP

(V)

IDET pin voltage(VIDET) vs.

IIN- pin voltage(VIIN- )

-1.5

-1.0

-0.5

0.0

00.5 11.5

VIIN- (V)

VIDET

(V)

(Normal operation)

1.52

1.53

1.54

1.55

1.56

-50050100150

Tj (°C)

Vr (V)

Voltage error amplifier

reference voltage(Vr) vs. junction temperature(Tj)

OCP input threshold voltage(VTHOCP) vs.

junction temperature(Tj)

-1.12

-1.11

-1.10

-1.09

-1.08

-1.07

-50 0 50 100 150

Tj (°C)

VTHOCP

(V)

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Fuji Electric FA5502P Montage- und Bedienungsanleitung

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