TPS92511DDA

TEXAS INSTRUMENTS  TPS92511DDA  发光二极管驱动器, 1输出, 降压, 恒流, 4.5V-65V输入, 500kHz开关, 65V/500mA输出, HSOP-8

The is a 30W Anode Capable Constant Current Buck LED Driver for driving a single LED string with current up to 0.5A and efficiency up to 95%. Only 5 external components are required for basic operation and single layer PCB layout is feasible because of the integration of an N-MOSFET, no external current sensing resistor, no external compensation and the proper terminal assignment. A high-value external resistor programs the LED current so that fine tuning of the LED current can be achieved. Another high-value external resistor programs a constant switching frequency from 50 to 500kHz. EMI design becomes easier as a result of constant switching frequency. By adding simple external circuits, the device can handle applications with even higher input voltages. It applies a floating buck topology with a low-side N-channel power MOSFET, which does not need boot-strapping capacitor.

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Requires no external current sensing resistor

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Requires no external loop compensation

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Ease of use, needs minimum 5 components

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1000:1 Contrast ratio feasible

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Single layer PCB feasible

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Can work as high voltage buck regulator

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Can work as linear current shunt regulator

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Integrated low-side N-channel MOSFET

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LED current programmable up to 0.5A

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Typically ±3.6% LED current accuracy

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Switching frequency programmable from 50 to 500kHz

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Current limit protection

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VCC under-voltage lock-out

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Thermal shutdown protection

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Support analogue dimming and thermal foldback

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Green product and no Sb/Br

This device has limited built-in ESD protection, leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.