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SD4842P67K65

Description
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CategoryPower/power management    Switching power supply chip   
File Size567KB,11 Pages
ManufacturerSilan
Websitehttp://www.silanic.com.cn/
Hangzhou Silan Microelectronics Co., Ltd. (SSE stock code: Silan Micro, 600460) is located in Hangzhou High-tech Industrial Development Zone. It is a high-tech enterprise specializing in integrated circuit chip design and semiconductor microelectronics related product production. The company's current main products are integrated circuits and semiconductor products.
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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.
SD4840P67K65
SD4841P67K65
SD4842P67K65
SD4843P67K65
SD4844P67K65
DIP-8-300-2.54
Package
Marking
SD4840P67K65
SD4841P67K65
SD4842P67K65
SD4843P67K65
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
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