Monolithic Power Systems MP3393

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 frequencyis 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 feedbackresistor. 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 indicatesthe 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

• 9V-to-32V Input Voltage Range
• Drives 8 Channels of LED strings
• Internal Constant-Current Control
• Maximum Channel Current Over 350mA
• 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

Typical applications

• Monitors
• Flat Panel Video Displays
• LCD TVs

More information

• Datasheet
• IC product information