MP3398E 4-String, Max 400mA/String, 80V Return, Step-Up, WLED Controller The Future of Analog IC Technology DESCRIPTION FEATURES The MP3398E is a step-up controller with four 4-String, Max 400mA/String WLED Driver current channels designed to drive WLED 4.5V to 33V Input Voltage Range arrays for large LCD panel backlighting 80V ABS Rating for Each String applications. The MP3398E is able to expand 2.3% Current Matching Accuracy between the number of LED channels with two or more Each String ICs in parallel sharing a single power source. Direct PWM Dimming Mode Analog Dimming Mode with PWM Input The MP3398E employs peak-current mode with a fixed switching frequency. The frequency is Cascading Capability with a Single Power Source programmable through an external setting resistor. The MP3398E drives an external LED Open and Short Protection MOSFET to boost up the output voltage from a Programmable Recoverable Over-Voltage 4.5V to 33V input supply and regulates the Protection (OVP) current in each LED string to the value set by 202mV Latch-Off Cycle-by-Cycle Current an external current-setting resistor. Limit Threshold Latch-Off Over-Temperature Protection The MP3398E applies four internal current (OTP) sources for current balancing. The current Short Inductor/Diode Protection matching achieves 2.3% regulation accuracy Available in TSSOP-16EP, SOIC-16 and between strings. The low regulation voltage on PDIP-16 Packages the LED current sources reduces power loss. The MP3398E supports direct PWM dimming APPLICATIONS and analog dimming with PWM input. Full Desktop LCD Flat Panel Displays protection features include over-current All-in-One PCs protection (OCP), over-temperature protection 2D/3D LCD TVs (OTP), under-voltage protection (UVP), over- All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For voltage protection (OVP), LED short/open MPS green status, please visit the MPS website under Quality Assurance. MPS and The Future of Analog IC Technology are registered trademarks of protection, and inductor/diode short protection. Monolithic Power Systems, Inc. The MP3398E is available in TSSOP-16EP, SOIC-16 and PDIP-16 packages. MP3398E Rev. 1.05 www.MonolithicPower.com 1 1/26/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2021 MPS. All Rights Reserved. MP3398E 4-STRING, 80V, STEP-UP, WLED CONTROLLER TYPICAL APPLICATION MP3398E Rev. 1.05 www.MonolithicPower.com 2 1/26/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2021 MPS. All Rights Reserved.