SDH8635 is current mode PWM+PFM controller used for SMPS, with built-in high voltage MOSFET, high-voltage startup constant current source, and external sensing resistor.

SDH8635 has a built-in high-voltage startup constant current source, features low standby power dissipation (<30mW) and multi-mode control. At heavy load condition, it works in PWM mode. At light load condition, it works in PFM mode to improve the conversion efficiency. At no load, it enters burst mode to reduce the standby power dissipation.

SDH8635 integratesswitching frequency jitter to achieve low EMI. Built-in peak current compensation circuit makes the limit output power consistent even with different input AC voltages. Built-in soft startup reduces the transformer stress during power-on process to avoid transformer saturation.

SDH8635 integrates comprehensive exceptional protections including leading edge blanking (LEB),cycle-by-cycle peak current limit, VCC overvoltage protection(OVP), output overload protection(OLP)and over-temperature protection(OTP) etc.

Main feature

High-voltage startup
Low standby power dissipation<30mW
Multi-mode control
Switching frequency jitter
Peak current compensation
Soft startup
Leading edge blanking(LEB)
Cycle-by-cycle current limit
VCC overvoltage protection(OVP)
Output overload protection(OLP)
Over-temperature protection(OTP)

Ordering Information

Product Name	Package form	Marking	Hazardous Substance Control	Packing Type	Remarks
SDH8635	DIP-8-300-2.54	SDH8635	Halogen free	Tube

Block Diagram

Documents

title	Types of	Size (KB)	date	Download the latest English version
SDH8635		0	2020-04-02	SDH8635 Brief Datasheet

Packages

DIP-8-300-2.54

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