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