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reference designMP3393

Monolithic Power Systems MP3393

8-String Step-Up White LED Driver with External Transistor

Overview

TopologyBoost Converter
Input voltage10-28 V
Switching frequency120-160 kHz
Output 10.2 A
IC revision1.05

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

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L(µH)
IRP,40K(A)
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7447709330
SPECWE-PD SMT Power Inductor, 33 µH, 5.5 A
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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PD SMT Power Inductor
Inductance33 µH
Performance Rated Current5.5 A
DC Resistance45 mΩ
Self Resonant Frequency8.5 MHz
Size1210 
VersionStandard 
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