SD4840 查看數據表（PDF） - Silan Microelectronics

零件编号

产品描述 (功能)

比赛名单

SD4840

CURRENT MODE PWM CONTROLLER WITH BUILT-IN HIGH VOLTAGE MOSFET

Silan Microelectronics 

SD4840/4841/4842/4843/4844

CURRENT MODE PWM CONTROLLER WITH BUILT-IN HIGH VOLTAGE

MOSFET

DESCRIPTION

SD4840/4841/4842/4843/4844 is a current mode PWM controller

with low standby power and low start current for power switch. In

standby mode, the circuit enters burst mode to reduce the standby

power dissipation.

The switch frequency is 67KHz with ±2.5 KHz jitter frequency for

low EMI.

The stress on transformer during power on is reduced by the built-

in 15ms soft start circuit to avoid the saturation of transformer.

SD4840/4841/4842/4843/4844 includes under voltage lock-out,

over voltage protection, leading edge blanking, over current

protection and the temperature protection. The circuit will restart

automatically until the system is normal after the protection is

active.

FEATURES

* Lower start-up current (Typ.6μA)

* Frequency jitter for low EMI

* Overcurrent protection

* Overvoltage protection

* Undervoltage lockout

* Built-in temperature protection

* Built-in high voltage MOSFET

* Auto restart mode

* Built-in soft start

* Burst mode operation

* Cycle by cycle current limit

APPLICATIONS

* Switch power

ORDERING INFORMATION

Part No.

Package

Marking

SD4840P67K65

SD4840P67K65

SD4841P67K65

SD4841P67K65

SD4842P67K65

DIP-8-300-2.54

SD4842P67K65

SD4843P67K65

SD4843P67K65

SD4844P67K65

SD4844P67K65

Note: P denotes it is available in DIP8 package, 67k denotes 67KHz, and 65 denotes withstand voltage is 650V.

HANGZHOU SILAN MICROELECTRONICS CO.,LTD

Http: //www.silan.com.cn

REV:1.2 2008.12.17

Page 1 of 11

Share Link: