TTP932 Datasheet, PDF (1/21 Pages) Tontek Design Technology – 1A LED Driver with internal switch

TTP932
1A LED Driver with internal switch
Outline
 TTP932 is a high efficiency , constant current , continuous mode inductive step-down
converter, designed for driving constant current to high power（single or multiple）LED with
only 4 external components. TTP932 operates from input supply between 5V and 33V and
provides an externally adjustable output current of up to 1A.
 The TTP932 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 signal to the DIM pin , The DIM pin will accept a PWM waveform.
Additionally , to ensure the system reliability , TTP932 is built-in with over temperature
protection, and LED open-circuit short-circuit protection to protect system from being
damaged.
Characteristic
 1A output current
 Wide input voltage range：5V ～ 33V
 High efficiency（up to 95%）
 Internal NDMOS power switch
 Single pin on／off and brightness control using PWM
 Hysteretic PFM improves efficiency at light loads
 With Thermal、Soft start、LED open-short detect protection
 Only 4 External Components
 Up to 1Mhz switching frequency
 Typical 3% output current accuracy
Applications
 High power LED lighting
 Automotive LED lighting
 Low voltage industrial lighting
 LED back-up lighting
 Constant Current Source
2015/11/30
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Version：3.3