HT2801S

1/6

High Accuracy CV/ CC Primary Sensing Regulation Controller IC

www.hotchip.com.cn

Ver1.0

Description

HT2801S is high performance primary

sensing regulation and monolithic switching-

mode power controller which is designed for

small- power supply equipment with current

mode control. Built- in accurate CV/CC control

circuit. High integration design, a high

performance power BJT and PFM controller

and full protection circuits in single chip, to

minimize external components and save the

cost effectively. HT2801S can be simply

designed a typical flyback switch converter,

the unique driving technology promotes the

characteristics of withstand voltage and

achieves excellent converting efficiency

.

Fig. 1. CC vs CV Curve ( Typ.)

Features

TL431

(OTP) circuit

standards

EMC circuit

Application

Typical Application Circuitry

VIN

C1

LP NP

VAUX

Naux

RFB1

RFB2

RCS

CCPC

HV

Driver

CS

FB

GND CPC

NS

VS

Co

VO

IOUT

Vout

±5%

±10%

Iout

OUTput CC/CV VI Characteristic

+

+