深圳市钲铭科电子有限公司
GOSTON ELECTRONICS CO.,LTD
SM7525 Primary Side Feedback Controlling Switch
v1.6
SM7525
Features
Topological structure support:
Fly-back and low-cost BUCK-
Boost
Integrated 730V hybrid techno-
logy
Universal input voltage:
85Vac~265Vac
Constant current precision less
than ±5%
Universal voltage compatible
with 1~5W
SunMoon patented no auxiliary
winding of primary side feed-
back control technology without
coupler, 431 and other compo-
nents.
No loop compensation
Built-in LEB circuit
Cycle by cycle peak current
limiting
Output open/short circuit
Built-in soft-start
Built-in overvoltage protection
and short circuit protection
Package:SOP8
General Description
SM7525 is a primary side feedback controlling power chip used
in off-line small power AC/DC switching power. It realizes high
precision (less than ±5%) constant current output under universal
input voltage. The circuit is no loop compensation and saves
opto-coupler, L431, transformer auxiliary winding and other
components to reduce the cost.
The circuit integrates cycle by cycle peak current limiting, FB
overvoltage protection, output open/short protection and soft-start,
which optimize the reliability.
Pin Figure
SOP8
Output Power Meter
Input Voltage
Output Power
85Vac
�½�
265Vac
1~5W
180Vac
�½�
265Vac
5~7W
Applications
LED lighting driver
Typical Application
8
DRAIN
7
DRAIN
6
GND
AC
5
GND
SM7525
2
1
3
VCC
NC
CS
FB
DC
4
Absorbing
Circuit
Mail
:
sale@sz-ledpower.cn
Tel: 0755 -27593075
st Blvd.,South Area,Shenzhen High tech Industrial Park,Nanshan Dist.,Shenzhen.
Address: 3F,SSMEC Bldg.,15 South 1
-
Note: The latest datasheet is subject to the web(www.dianyuanic.com).
Fax: 0755 -29031113
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