LED7707

6 ，行85毫安的LED驱动器与升压稳压器LCD面板背光源 6-rows 85 mA LEDs driver with boost regulator for LCD panels backlight

The is a 6-row LED Driver with boost regulator. It consists of a high efficiency monolithic boost converter and six controlled current generators rows specifically designed to supply LEDs arrays used in the backlighting of LCD panels. The device can manage an output voltage up to 36V 10 white LEDs per row. The generators can be externally programmed to sink up to 85mA and can be dimmed via a PWM signal 1% dimming duty-cycle at 1kHz can be managed. The device allows to detect and manage the open and shorted LED faults and to let unused rows floating. Basic protections output over-voltage, internal MOSFET overcurrent and thermal shutdown are provided.

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Internal power MOSFET

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Internal +5V LDO for device supply

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Constant frequency peak current-mode control

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External synchronization for multi-device application

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Pulse-skip power saving mode at light load

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Programmable soft-start

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Programmable OVP protection

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Stable with ceramic output capacitors

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Thermal shutdown

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250kHz to 1MHz Adjustable switching frequency

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Backlight driver - <10µs Minimum dimming on-time and ±2% current matching between rows