FA5502 데이터 시트보기 (PDF) - Fuji Electric

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FA5502

Power Supply Control IC

Fuji Electric 

FA5502P/M

4. Block diagram

CT(15)

SYNC

(14)

OSC

Quality is our message

CS(11)

11µA

UVLO

16.5V/8.9V

REF(13)

VCC(10)

ON/OFF(12)

REF

5V

ON/OFF

3.95V/

2.8V

15k

4.85k

+

-

CUR.AMP

0.39V

OCP.COMP

R

SQ

S

PWM.COMP

11k

MUL

IDET(16)

IFB(1)

IIN-(2)

1.55V

OVP.COMP

ER.AMP

-

+

1.55V

1.64V

VDET(3)

VC

(9)

OUT

(8)

GND

(7)

VIN-

(6)

VFB

(5)

OVP

(4)

5. Pin assignment

Pin No.

1

Symbol

IFB

2 IIN-

3 VDET

4 OVP

5 VFB

6 VIN-

7 GND

8 OUT

9 VC

10 VCC

11 CS

12 ON/OFF

13 REF

14 SYNC

15 CT

16 IDET

Function

Current error amplifier

output

Inverting input to current

error amplifier

Multiplier input

Overvoltage protection

input

Voltage error amplifier

output

Inverting input to voltage

error amplifier

Ground

Output

Power supply to output

circuit

Power Supply

Soft-start

Output ON/OFF control

input

Reference voltage

Oscillator synchronization

input

Oscillator timing capacitor

and resistor

Non-inverting input to

current error amplifier

Description

Output of current error amplifier to connect

compensation network

Inverting input of current error amplifier to

connect compensation network

Input of multiplier to detect sinusoidal

waveform

Input to overvoltage protection circuit

Output of voltage error amplifier to connect

compensation network

Inverting input to voltage error amplifier to

detect PFC output voltage

Ground

Output for direct driving a power MOSFET

Power supply to output circuit

Power supply for IC

A pin to connect a capacitor for soft-start

Input of ON/OFF control circuit

Reference voltage output

Input of synchronization signal

A pin to connect timing capacitor and

resistor to set oscillation frequency

Input of inductor current signal

5

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