RY3730 高性能、恒流 LED 驱动器.pdf

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2023-03-10 发布于广东
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RY3730 高性能、恒流 LED 驱动器.pdf

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RY3730 High Performance, Constant Current LED Driver with PWM Brightness Control Features • 2.5V to 5.5V Input Voltage • Internal Compensation • Drivers up to 8 Series WLEDs • Thermal Shutdown • Low 250mV Feedback Voltage • Over Voltage Protection • 1.2MHz Fixed Switching Frequency • Dimming with wide Frequency Range • Internal 1.6A Switch Current Limit • Available in SOT23-6 package Applications • Camera Flash White LED • PDA LED back light • Digital still cameras General Description The RY3730 is a step-up converter designed for driving up to 8 Series white LEDs from a single cell Lithium Ion battery. The device features integrated overvoltage protection and Its low 250mV feedback voltage reduces power loss and improves efficiency. Optimized operation frequency can meet the requirement of small LC filters value and low operation current with high efficiency. Internal soft start function can reduce the inrush current. SOT23-6 package type provides the best solution for PCB space saving and total BOM cost. Typical Application Circuit VIN L1 D1 VOUT n·WLED VIN SW COUT OVP Dimming CIN CTRL FB GND