Product Summary

The SD42524 is a step down PWM control LED driver with a built in power MOSFET. The SD42524 achieves 1A continuous output current in 6~36V input voltage range. The SD42524 provides thermal shutdown circuit, current limit circuit and PWM dimming circuit. The SD42524 adopts current mode control which provides fast transient response and simple loop stabilization design. It has high efficiency up to more than 96%, and has excellent constant current characteristic when the input/output voltage changed, with the excellent current accuracy within ±1%. The SD42524 applications are: (1)MR16 LED spotlight; (2)LED illuminance; (3)LED street lamp.

Parametrics

SD42524 absolute maximum ratings: (1)Supply Voltage VIN: 40 V ; (2)Switch Voltage VSW: －1~VIN+1 V; (3)PWM Voltage VPWM: －0.3~6 V; (4)Comp Voltage VCOMP: －0.3~6 V; (5)SENSE voltage VSENSE: －0.3~VIN V; (6)Junction Temperature Tj: 150 ℃; (7)Lead Temperature TL: 260 ℃; (8)Storage Temperature TSTG: －65~150 ℃; (9)Input Voltage VIN: 6~40 V ; (10)Operating Temperature TOPR: －40~125 ℃.

Features

SD42524 features: (1)6-36V input voltage range; (2)Maximum 1A output current; (3)0.40Ω built-in power MOSFET; (4)Integrate Jitter function; (5)Thermal compensation; (6)PWM dimming function; (7)280kHz fixed frequency; (8)Excellent constant current accuracy ±1%; (9)High efficiency up to 96%; (10)Thermal shutdown; (11)Cycle-by-cycle over current protection.

Diagrams

SD42524 pin coonection