LM3424MH

TEXAS INSTRUMENTS  LM3424MH  发光二极管驱动器, 1输出, 升压, 降压, 降压-升压, SEPIC, 4.5V-75V输入, 597kHz开关, 1A输出, TSSOP-20

The is a constant current N-channel Controller with thermal fold back for driving LEDs. It can be easily configured in buck, boost, buck-boost and SEPIC topologies. In addition, it includes a thermal fold back feature for temperature management of the LEDs. This flexibility, along with an input voltage rating of 75V, makes the LM3424 ideal for illuminating LEDs in a large family of applications. Adjustable high-side current sense allows for tight regulation of the LED current with the highest efficiency possible. It uses standard peak current-mode control providing inherent input voltage feed-forward compensation for better noise immunity. It is designed to provide accurate thermal fold back with a programmable fold back breakpoint and slope. In addition, a 2.45V reference is provided. It includes a high-voltage start-up regulator that operates over a wide input range of 4.5 to 75V.

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High-side adjustable current sense

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Input under-voltage and output over-voltage protection

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PWM and analogue dimming

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Cycle-by-cycle current limit

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Programmable soft start and slope compensation

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Programmable and synchronizable switching frequency

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Programmable thermal fold back

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Precision voltage reference

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Low power shutdown and thermal shutdown

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2R, 1A Peak MOSFET gate drive

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Green product and no Sb/Br