SSSSttttaaaarrrrCCCChhhhiiiippppssss Technology SCT2932 V02 01 Nov/14 11..55AA LLEEDD DDrriivveerr wwiitthh IInntteerrnnaall SSwwiittcchh 11..55AA LLEEDD DDrriivveerr wwiitthh IInntteerrnnaall SSwwiittcchh Product Description SCT2932 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. SCT2932 operates from input supply between 5V and 33V and provides an externally adjustable output current of up to 1.5A. The SCT2932 is specifically designed with PFM control to enhance the efficiency up to 97%. 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, SCT2932 is built-in with over temperature protection, and LED open-circuit short-circuit protection to protect system from being damaged. Features 1.5A output current Wide input voltage range: 5V to 33V High efficiency (up to 97%) 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 backlighting Constant current source Page 1 of 27 11..55AA LLEEDD DDrriivveerr wwiitthh IInntteerrnnaall SSwwiittcchh SCT2932 11..55AA LLEEDD DDrriivveerr wwiitthh IInntteerrnnaall SSwwiittcchh Pin Configuration/Package Type Terminal Description Pin Name I/O Function SW O Drain of NDMOS switch GND - Ground terminal DIM I Dimming control terminal SEN I Connect resistor RS from this pin to VIN to define nominal average output current VIN - Power supply terminal Ordering Information Part Marking Package Unit per reel(pcs) SCT2932C SCT2932C Green TO252-5 80-Tube SCT2932D SCT2932D Green MSOP8 (with thermal pad) 80-Tube SCT2932E SCT2932E Green SOP8 (with thermal pad) 100-Tube SCT2932F 2932F Green SOT89-5 1000 SCT2932J 932J Green SOT23-5 3000 StarChips Technology, Inc. 4F, No.5, Technology Rd., Science-Based Industrial Park, Hsin-Chu, Taiwan, R.O.C. Tel : +886-3-577-5767 Ext.555, Fax: +886-3-577-6575, E-mail : service starchips.com.tw Page 2 of 27