MP3399

MP3399

5V-28Vin, 12-Channel Boost WLED Controller With Daisy Chain Capability for 24-Channel

Datasheet

Description

The MP3399 is a step-up controller with 12-channel current sources designed for driving the WLED arrays for large size LCD panel backlighting applications. The MP3399 uses current mode, fixed frequency architecture. The switching frequency is programmable by an external frequency setting resistor. It drives an external MOSFET to boost up the output voltage from a 5V to 28V input supply. The MP3399 regulates the current in each LED string to the programmed value set by an external current setting resistor. The MP3399 applies 12 internal current sources for current balance. And the current matching can achieve 2.5% regulation accuracy between strings. Its low 600mV regulation voltage on LED current sources reduces power loss and improves efficiency. PWM dimming is implemented with external PWM input signal or DC input signal. The dimming PWM signal can be generated internally, and the dimming frequency is programmed by an external setting capacitor. The MP3399 is flexible for extending LED channels with two or more MP3399s in parallel.

Features & Benefits

High Efficiency and Small Size
5V to 28V Input Voltage Range
Maximum 60mA for Each String
2.5% Current Matching Accuracy Between Strings
Programmable Switching Frequency
PWM or DC Input Burst PWM Dimming
Open and Short LED Protection
Programmable Over-voltage Protection
Under Voltage Lockout
Flexible Extended LED Channels Application
Thermal Shutdown
28-pin TSSOP and 28-pin SOIC Package

Active Part Numbers:

MP3399EF-LF-P MP3399EF-LF-Z MP3399EY-LF-P MP3399EY-LF-Z

Meaning of P & Z

Evaluation Tools

2EV3399EF-00A Evaluation Kit 4 Strings White LED Driver Evaluation Board

The EV3399EF-00A is an evaluation board for the MP3399EF, a 12 LED channels step-up converter designed for large liquid-crystal displays that employ an array of LEDs as the light source. The board builds with two MP3399EF in parallel to drive 24 strings LEDs with 60mA maximum current.

The MP3399 uses external power mosfet and internal current mode, fixed frequency architecture and includes current ballast in each string terminal, which achieves 2.5% current regulation accuracy between strings. Low feedback voltage at each LED string help reduce power loss and improve efficiency.

The MP3399 has multiple features to protect the converter from fault conditions, including under-voltage lockout, current limiting, over voltage, short LED, open LED and thermal shut-down protection.

$100.00
+ tax

Design Resources

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