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SiFirst_DS_5773_V1.0

SF5773

Pin Configuration

Ordering Information

Part Number

Top Mark

Package

Tape & Reel

SF5773LGT

.73YWW

SOT26

Green

Yes

Marking Information

Pin Description

Pin Num

Pin Name

I/O

Description

1

GND

P

IC ground pin.

2

FB

I

Voltage feedback pin. The loop regulation is achieved by connecting a

photo-coupler to this pin. PWM duty cycle is generated by this pin voltage

and the current sense signal at Pin 4.

3

DEM

I

Transformer core demagnetization detection pin. This pin is also used for

output over voltage protection (Output OVP).

4

CS

I

Current sense input pin.

5

VDD

P

IC power supply pin.

6

GATE

O

Totem-pole gate driver output to drive the external MOSFET.