MP3388SGR-P

The MP3388SGR-C681-Z is a step-up converter with 8 current-source channels designed to drive arrays of white LED for LCD-panel backlighting applications. The MP3388SGR-C681-Z uses current-mode, fixed-frequency architecture, and users can select a switching frequency of either 625kHz or 1.25MHz. It generates an output voltage up to 50V from a 4.3V-to-25V input supply. The MP3388SGR-C681-Z independently regulates the current in each LED string set by an external current setting resistor to a user-programmed value. The MP3388SGR-C681-Z applies an internal current source to each LED string terminal, and can achieve a current balance of 2.5% regulation accuracy between strings. Its low 600mV regulation voltage on LED current sources reduces power loss and improves efficiency. The MP3388SGR-C681-Z features external PWM dimming or DC-input PWM dimming, which allows for flexible backlight luminance control. The dimming PWM signal can be generated internally, and the dimming frequency is programmed by an external setting capacitor.

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