MP3388

MP3388

NOT RECOMMENDED FOR NEW DESIGNS

4.5V-25Vin, 50Vout, 8-Channel Boost WLED Driver

ALTERNATIVE PART

NRFND Datasheet

MP3388 continues to be in production for existing customers. Please consider this alternative for new designs:

MP3388S

4.5V-25Vin, 50Vout, 8-Channel Boost WLED Driver

Features & Benefits

High Efficiency
Compact Size
4.3V-to-25V Input Voltage Range
50V Maximum Step-Up Voltage
Balanced Driver for 8 WLED Strings
2.5% Current-Matching Accuracy between Strings
Selectable Switching Frequency of 625kHz or 1.25MHz
PWM or DC Input-Burst PWM Dimming
Programmable Over-Voltage Protection
Under-Voltage Lockout
Open- and Short-LED Protection
Thermal Shutdown
Small QFN24 (4mm × 4mm) Package

… and many more!

Description

The MP3388 is a step-up converter with 8-channel current sources designed for driving the white LED arrays for large size LCD panel backlighting applications. The MP3388 uses current mode, fixed frequency architecture. The switching frequency can be selected at 1.25MHz or 625kHz. It generates an output voltage up to 50V from a 4.5V to 25V input supply. The MP3388 independently regulates the current in each LED string to the user programmed value set by an external current setting resistor. The MP3388 applies 8 internal current sources in each LED string terminal to achieve a current balance of ±3% regulation accuracy between strings. Its low 600mV regulation voltage on LED current sources reduces power loss and improves efficiency. The MP3388 features external PWM dimming or DC input PWM dimming, which allows the flexible control of the backlighting luminance.. The dimming PWM signal can be generated internally, and the dimming frequency is programmed by an external setting capacitor.