HT2800S

2/6

High Performance Primary Sensing Regulation Controller IC

www.hotchip.com.cn

Ver1.0

Pin Configuration

HT2800S is provided with SOP- 7 Package shown as below：

Pin Configuration

Pin #

Pin

Name

Description

1

VCC

Power supplying pin of the controller,

In order to let the controller gain more

Stable supply voltage, the external filter capacitor must use low equivalent im

-pedance (Low ESR) of the electrolytic

capacitor .

2

FB

Output feedback pin, to detect the output condition through the auxiliary wind

-ing voltage of the transformer

3

CPC

To connect with a 100+nf capacitor, the pin will become output cable drop

compensation pin

4

CS

Connect external primary current sensing resistor RCS, the controller can

detect the

primary current through the external sense

resistor. When the

voltage on the resistor achieves the maximum value, the

internal power

BJT will be turn off immediately

5- 6

HV

To connect the collector of internal power BJT

7

GND

The referring grounding pin of the controller

Internal Function Block Diagram