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发布者:微桥 发布时间:2012-6-19 阅读:4690次    关键字: LED驱动
FP7152-1A LED Driver with Internal Switch


FP7152 1A LED Driver with Internal Switch

General Description
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The FP7152 is a continuous mode inductive step down converter. It can driving single or multiple series connected LEDs. The FP7152 includes the output switch and a high-side output current sensing circuit, which use an external resistor to set the average output current. Output current can also be adjusted by applying an external signal to the ‘ADJ’ pin. The ADJ pin will accept either a DC voltage or a PWM waveform. The PWM filter components are contained within the chip. Applying a voltage under 0.2V to the ADJ pin will turn off the output.
The FP7152 is available in the SOT89-5L package and provides space-saving PCB for the application fields.


Features
˙1A Output Current
˙Internal 0.5Ω 26V Power MOSFET Switch
˙Wide 7 to 26V Operating Input Range
˙20μA Shutdown Mode Current
˙Typical 4% Output Current Accuracy
˙Signal pin ON / OFF and Brightness Control
˙Adjustable Soft-Start
˙Up to 95% Efficiency
˙Up to 1MHz Switching Frequency
˙Internal Dimming Filter
˙Package: SOT89-5L

Typical Application Circuits

 

 

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