SM7523 Datasheet – Control Power Switch Chip ( PDF )

Part Number: SM7523

Function: Constant primary control power switch

Package: SOP 8 Pin Type


Image and Pinouts:

SM7523 datasheet



SM7523 is a high-performance primary-side feedback control power switch chip applied to off-line low-power AC/DC switching power supplies. It achieves high-precision constant current output within the full voltage input range, with an accuracy of less than ±5%, without loop compensation, and The system can save optocouplers, TL431 and transformer auxiliary windings and other components, reducing costs. The chip integrates protection functions such as cycle-by-cycle peak current limit, FB over-voltage protection, output open/short-circuit protection, and boot soft start to improve the reliability of the system.


1. Wide voltage 85Vac~265Vac input voltage range constant current accuracy is less than ±5%

2. Compatible with 1~3W in the full voltage range

3. Mingwei’s patented primary-side feedback control technology without auxiliary winding can save optocoupler, 431 and other components in the system

4. No loop compensation required

5. Built-in leading edge blanking circuit (LEB)

6. Cycle-by-cycle peak current comparison

7. Output open/short circuit protection

8.  Built-in soft start


Application circuits


Other data sheets are available within the file: SM-7523

SM7523 Datasheet PDF Download

SM7523 pdf