General De
KSD932 is a high efficiency, constant current, continuous mode inductive steop-down converter,designed for driving constant current to high power (single or multiple) LCD with only 4 external components. KSD932 operates from input supply between 5V and 36V and provides an externally adjustable output current of up to 1A.
The KSD932 is specifically designed with PFM control to enhance the efficiency up to 95%.The output current can be modify by an external resister, and can adjusted, by applying an external control signed to the DIM pin. T he DIM pin will accept a PWM waveform.
Additionally, to ensure the system reliability , KSD932 is built-in with over temperature protection, and LED open-circuit short-circuit protection to protect system from being damaged.
Featuers
u 1A output current
u Wide input voltage:5V to 36V
u High efficiency (up to 95%)
u Internal NDMOS power switch
u Single pin on/off and brightness control using PWM
u Hysteretic PFM inproves efficiency at light loads
u With Thermal/Soft start /LED open-short detect protection
u Only 4 Extemal Conponents
u Up to 1MHz switching frequency
u Typical 3% output current accuracy
Applications
u High power LED lighting
u Automotive LED lighting
u Low voltage industrial lighting
u LED back-up lighting
u Constant Current Source