MP3393

MP3393

9V-32Vin, 8-Channel Boost WLED Controller with 8 Ext. Current Sinks

Datasheet

Description

The MP3393 is a step-up controller with 8 current channel sources designed to power WLED backlights for large LCD panels. The MP3393 uses current-mode fixed-frequency architecture. It drives an external MOSFET to boost the output voltage. The switching frequency is programmable by an external setting resistor. The MP3393 integrates a constant-current control circuit to regulate the current in each LED string to the value set by an external current feedback resistor. Current matching can achieve 1.2% regulation accuracy between strings. Its low 202mV regulation voltage reduces power loss and improves efficiency. The MP3393 includes protections including under-voltage lockout, LED open/short protection, and thermal shutdown. The fault flag pin indicates the statuses of all fault signals. The MP3393 can be daisy-chained to expand the number of LED channels. It is available in TSSOP28EP and SOIC28 packages.

Features & Benefits

9V-to-32V Input Voltage Range
Drives 8 Channels of LED strings
Internal Constant-Current Control
Maximum 350mA for Each String
1.2% Current Matching Accuracy Between Strings
Programmable Switching Frequency
Analog Dimming and External PWM Dimming
Open and Short LED Protection
Programmable Over-Voltage Protection
Fault Output Flag
Thermal Shutdown
Extendable LED Channels that Share One Power Stage Set
TSSOP28EP and SOIC28 Packages

Active Part Numbers:

MP3393EF-LF-P MP3393EF-LF-Z MP3393EY-LF-P MP3393EY-LF-Z

Meaning of P & Z

Evaluation Tools

EV3393-F-00A Evaluation Kit Step-Up, 8-String, External Transistor White LED Driver Evaluation Board

The EV3393-F-00A is an evaluation board for the MP3393, a step-up controller with 8-channel external-transistor current sources.

The MP3393 uses current mode, fixed frequency architecture. It drives an external MOSFET to boost up the output voltage from 9V to 32V input supply. The switching frequency is programmable by an external setting resistor.

The MP3393 integrates the constant current control circuit to regulate the current in each LED string to the value set by an external current feedback resistor. And the current matching can achieve 1.2% regulation accuracy between strings. Its low 202mV regulation voltage on LED current sources reduces power loss and improves efficiency.

The EV3393-F-00A is a fully assembled and tested PCB. It generates a 1.6A (200mA/string, 8 strings) output current at LED load from a 12V to 30V input range. Switching frequency is set at 160kHz.

$100.00
+ tax

Design Resources

Symbol, Footprint & 3D Model

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