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SiFirst_DS_5778_V1.1

DEM

VDD

1

2

3

FB

GND

Drain

DIP7

4

7

6

5

CS

Drain

Ordering Information

Part Number

Top Mark

Package

Tape & Reel

SF5778EP

SF5778EP

DIP7

RoHs

Output Power Table

(1)

Part Number

230VAC ± 15%

(2)

85-265VAC

Adapter

(3)

Adapter

(3)

SF5778

20W

16W

Note 1. The Max. output power is limited by junction temperature

Note 2. 230VAC or 100/115VAC with doublers

Note 3. Typical continuous power in a non-ventilated enclosed adapter with sufficient drain pattern as a heat

sink at 50

Marking Information

S F 5 7 7 8 E P

Y WW

YWW: Year&Week code

Pin Description

Pin Num

Pin Name

I/O

Description

1

VDD

P

IC power supply pin.

2

DEM

I

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

output over voltage protection (Output OVP).

3

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.

4

CS

I

Current sense input pin.

5-6

Drain

P

High voltage power MOSFET drain connection.

7

GND

P

Ground.