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MP3372

8-Channel, Synchronous, 50V Boost, WLED Driver with I2C Interface and Phase Shift Function

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Description

The MP3372 is a synchronous boost converter with eight current channels designed to drive WLED arrays for LCD panels in tablets and notebook backlighting applications.

The MP3372 uses peak current mode and pulse-width modulation (PWM) control to regulate the boost converter. The device employs a standard I²C digital interface to set the operation mode, switching frequency, full-scale current, synchronous or asynchronous mode, dimming mode and duty, and various protection thresholds.

The MP3372 features high efficiency due to the low headroom voltage for LED regulation and the switching MOSFET’s small on resistance. The synchronous rectifier saves PCB size and total BOM cost.

The MP3372 is available in a QFN-24 (4mmx4mm) package.

Advantages Include:

Highly integrated to save BOM cost and PCB size
Variety of dimming methods and good dimming performance (10000:1 dimming ratio at 100Hz)
LED open/short, inductor/diode short, OTP, adjacent pin short protections
I2C for flexible application
Phase shift to reduce audible noise
Auto-switching function to boost the efficiency at light load (MP3372)

Features & Benefits

8 Channels, Max 50mA, 45V VOUT, I2C interface
3V to 30V Input Voltage
Max 2.5% Current Matching
A1 Pins for 2 PCS IC Selection
Unused LED String Auto-Disable During Start-Up
Free for Adjacent Pin Short Test
Available in QFN-24 (4mmx4mm) Package
10000:1 PWM Dimming Ratio at 100Hz
350kHz to 2.4MHz Selectable fSW
Selectable Synchronous or Non-Synchronous Mode
Analog and Mix Dimming
Linear Smooth Dimming Slope Set
Phase Shift Function (MP3372)
LED Short/Open, OTP, and OCP Protections

Evaluation Tools

EV3372-R-00A Evaluation Kit 8-Channel, Synchronous Boost WLED Driver with I²C Interface Evaluation Board

The EV3372-R-00A is an evaluation board for the MP3372, a synchronous boost converter with eight current channels. The IC is designed to drive WLED arrays for LCD panels in tablets and notebook backlighting applications.

The MP3372 uses peak current mode and pulse-width modulation (PWM) control to regulate the boost converter. The MP3372 employs a standard I²C digital interface to set the operation mode, switching frequency, full-scale current for each channel, sync or non-sync mode, dimming mode and duty, and various protection thresholds.

The low-headroom voltage for LED regulation and small on resistance of the switching MOSFET provide the MP3372 with high efficiency. The synchronous rectifier saves PCB size and total BOM cost.

The MP3372 is available in a QFN-24 (4mmx4mm) package.

$50.00
+ tax

Design Resources

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