LED Lighting Drivers 4-String, Max 400mA/String, 80V Return, Step-Up, White LED Controller

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Part #:
Lead Time 64 weeks
Unit Price:$1.30
Minumum Qty: 1
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The MP3398E is a step-up controller with 4 current channels, which is designed to drive WLED arrays for large-size LCD-panel back-lighting applications. It is flexible to expand the number of LED channels by two or more ICs in parallel sharing a single inductive power source.

The MP3398E uses peak-current mode with fixed switching frequency. The frequency is programmable by an external setting resistor. The MP3398E drives an external MOSFET to boost up the output voltage from a 5V to 28V input supply. It regulates the current in each LED string to the value set by an external current-setting resistor.

The MP3398E applies 4 internal current sources for current balance. The current matching can achieve 2.5% regulation accuracy between strings. Its low regulation voltage on LED current sources reduces power loss.

The MP3398E can support both analog and PWM dimming independently to meet the different dimming-mode request. In addition, rich protection modes are also integrated including OCP, OTP, UVP, OVP, LED short/open protection, inductor/diode short protection.

The MP3398E is available in a TSSOP16-EP package.

Symmetry Electronics is an authorized Monolithic Power Systems distributor.


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4-String, Max 350mA/String WLED Driver
5V to 28V Input Voltage Range
2.5% Current Matching Accuracy Between Strings
Programmable Switching Frequency
PWM and Analog Dimming Mode
Cascading Capability with a Single Power Source
LED Open and Short LED Protection
Programmable Over-Voltage Protection
Recoverable Thermal Shutdown Protection
Latch-off Over Current Protection
Inductor/Diode short Protection
Under-Voltage Lockout
TSSOP16-EP Package


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Monolithic Power Systems Certification Guide