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SD4840

Silan Microelectronics
Part Number SD4840
Manufacturer Silan Microelectronics
Description PWM Controller
Published Jan 12, 2010
Detailed Description SD4840/4841/4842/4843/4844 CURRENT MODE PWM CONTROLLER WITH BUILT-IN HIGH VOLTAGE MOSFET DESCRIPTION SD4840/4841/4842/48...
Datasheet PDF File SD4840 PDF File

SD4840
SD4840

Overview
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 builtin 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 r...


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