陕西亚成微电子有限责任公司
技术支持部2010.10
www.reactor-micro.com2010/11/11OUTLINE:
12、Basic circuit for LED driverBasiccircuitforLED3、、RM3253 Description
driver5W-LEDApplication Circuit
www.reactor-micro.com2010/11/11
1、basic circuit LED driverbasiccircuitLEDdriver
?Integral Type ：Integrated power supply and constant current circuit,
simple structure, low cost, suitable for low power
applications the following 40Wlitithflli40W
?Split Type：Independent power supply and constant current circuit,
with flexibility, increased flexibility, high power lightingapplications for more than 40W
www.reactor-micro.com2010/11/11
SPEC.
AC Input Power rangePFrequiredPF requiredCurrent AccuracyFull load efficiency
90V ～264V 90V ～264V
＜15W 10W ～40W
NoNo
YesPF＞0.94 Yes, PF094
90V ～264V
＞40W YesPF＞0.94 Yes, PF 094
±5% for DC level ±5% for DC level ±5% for DC level
～80%
＞85%
＞87% Landscape ，stage lighting / ggglights / outdoor decorative lights,
etc
Table Lamp / Residential ，
interior decoration residential lighting / gg/ lights, etcgarden lighting
Applications
RM Referral ProgramRM3253
www.reactor-micro.com2010/11/11
2、RM3253 Description
The RM3253 switch Intergard Circuit cost effectively replace all power supplies,and up to 5W output power based on unregulated isolated linear transformer (50/60HZ). Unlike conventional PWM (pulse width modulation) controllers, they regulate the output voltage in a new method of off-time modulation control. The controller consists of a VCO (voltage control oscillator), Sense and logic circuit, VDD pin, under-voltage lockout circuit, protection for over-voltage, current limited circuit, leading edge blanking over load protection and fault condition auto-restart They are leading edge blanking, over load protection and fault condition auto-restart. They are ideal low power AC/DC adapter/charger solution for portable devices, otherwise,its Built-in 800V high voltage BJT and minimal external componets.
www.reactor-micro.com2010/11/11
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