2015/04/14

Rev.A.1

2

EM8565D

Pin Assignment

Pin Name

Pin Number

Pin Function

DIP-7

CS

1

Senses the primary current.

BNO

2

Line voltage detection. Use for brown-out protection.

GND

3

Ground.

COMP

4

Voltage feedback pin. By connecting a photo-coupler to close the control loop

and achieve the regulation.

VCC

5

IC Power Supply Pin.

D

6,7

For start-up, the pin is also HV Power MOSFET drain Pin.

Function Block Diagram

CS

COMP

BNO

GND

R

S

Q

OTP

OLP

+

-

Green

Mode

PWM

Comparator

OCP

Compensation

Control

Logic

Oscillator

29V

15V / 8.8V

UVLO

OVP

Vbias

Max duty

2R

R

Soft

Start

PG

2.8V

/ 2.3V

BNO

D

Start

up

LEB

Slope

Comp

Driver

4V

0.2V

-

VCC