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MPQ3387L - White LED Driver

Description

The MPQ3387L is a step-up converter with 6channel current sources.

It is designed for driving the white LED arrays as backlighting of middle or large size LCD panel.

The MPQ3387L uses peak-current mode as its PWM control architecture.

Features

  • external digital PWM dimming and analog dimming, both of which sharing a single input with 25% PWM duty cycle as a transfer point. The mix-dimming strategy helps to improve the dimming ratio. Also, MPQ3387L automatically transfers the PWM input signal 100Hz to 20kHz frequency to 24kHz to 27.5kHz to eliminate the audible noise. MPQ3387L has rich protection modes to guarantee safety operation. The protection modes include recoverable OCP (over-current protection), OVP (over-voltage protection), OT.

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Full PDF Text Transcription

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MPQ3387L Step-up, 6 strings, Max. 45mA/string, Combined Analog and PWM dimming, White LED Driver The Future of Analog IC Technology AEC-Q100 Qualified DESCRIPTION The MPQ3387L is a step-up converter with 6channel current sources. It is designed for driving the white LED arrays as backlighting of middle or large size LCD panel. The MPQ3387L uses peak-current mode as its PWM control architecture. The switching frequency can be programmed by a resistor. It generates an output voltage up to 45V from a 3V to 25V input supply. The MPQ3387L independently regulates the current in each LED string to the value set by an external current-setting resistor.
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