DESCRIPTION
The MP3383 is a step-up controller with four
LED current channels, designed to drive WLED
arrays for large LCD panel backlighting
applications. The MP3383 can expand the
number of LED channels with two or more ICs in
parallel sharing a single power source.
The MP3383 employs peak current control mode
with a fixed switching frequency (fSW) that is
configurable via an external setting resistor. The
MP3383 drives an external MOSFET to boost up
the output voltage (VOUT) from a 6V to 33V input
voltage (VIN) supply. It also regulates the current
in each LED string to the value set by an external
current-setting resistor.
The MP3383 applies four internal current
sources for current balancing. The current
matching achieves 1.8% regulation accuracy
among strings. The low regulation voltage on the
LED current sources reduces power loss.
The MP3383 supports direct pulse-width
modulation (PWM) dimming as well as analog
dimming using a PWM input. Full protection
features include over-current protection (OCP),
over-temperature protection (OTP), undervoltage
protection (UVP), over-voltage
protection (OVP), LED short and open protection,
and inductor and diode short protection.
The MP3383 is available in SOIC-16 and
TSSOP-16EP packages.

FEATURES
• 4-String, Max 400mA/String WLED Driver
• 6V to 33V Input Voltage (VIN) Range
• 12V Gate Voltage (VGATE) (VIN > 13V)
• 80V Absolute Maximum Rating for Each
String
• 1.8% Current Matching Accuracy between
Each String
• 3% Current Accuracy
• Direct PWM Dimming
• Analog Dimming Mode with PWM Input
• Cascading Capability with a Single Power
Source
• LED Open and Short Protection
• Configurable Recoverable Over-Voltage
Protection (OVP)
• Over-Temperature Protection (OTP)
• Short Inductor and Diode Protection
• Available in SOIC-16 and TSSOP-16EP
Packages

APPLICATIONS
• Desktop LCD Flat-Panel Displays
• All-in-One PCs
• 2D and 3D LCD TVs