MP3398A Step up, 4 strings, Max. 350mA/string Analog and PWM dimming, White LED Controller DESCRIPTION FEATURES The MP3398A is a step-up controller with 4 4-String, Max 350mA/String WLED Driver current channels, which is designed to drive 5V to 28V Input Voltage Range WLED arrays for large-size LCD-panel 2.5% Current Matching Accuracy Between backlighting applications. It is flexible to expand Strings the number of LED channels by two or more Programmable Switching Frequency ICs in parallel sharing a single inductive power PWM and Analog Dimming Mode source. Cascading Capability with a Single Power The MP3398A uses peak-current mode with Source fixed switching frequency. The frequency is LED Open and Short LED Protection programmable by an external setting resistor. Programmable Over-Voltage Protection The MP3398A drives an external MOSFET to Recoverable Thermal Shutdown Protection boost up the output voltage from a 5V to 28V Over Current Protection input supply. It regulates the current in each Inductor/Diode short Protection LED string to the value set by an external Under-Voltage Lockout current-setting resistor. SOIC16, TSSOP16-EP and SOIC20 The MP3398A applies 4 internal current Packages sources for current balance. The current matching can achieve 2.5% regulation accuracy APPLICATIONS between strings. Its low regulation voltage on Desktop LCD Flat Panel Displays LED current sources reduces power loss. Flat Panel Video Displays 2D/3D LCD TVs and Monitors The MP3398A can support both analog and PWM dimming independently to meet the All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. For different dimming-mode request. In addition, MPS green status, please visit MPS website under Quality Assurance. MPS and The Future of Analog IC Technology are Registered Trademarks rich protection modes are also integrated of Monolithic Power Systems, Inc. including OCP, OTP, UVP, OVP, LED short/open protection, inductor/diode short protection. The MP3398A is available in SOIC16, TSSOP16-EP and SOIC20 packages. TYPICAL APPLICATION MP3398A Rev. 1.06 www.MonolithicPower.com 1 7/11/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2018 MPS. All Rights Reserved. STEP UP, 4 STRINGS, MAX. 350MA/STRING ANALOG AND PWM DIMMING, WHITE LED CONTROLLER ORDERING INFORMATION Part Number Package Top Marking MP3398AGS* SOIC16 See Below MP3398AGF** See Below TSSOP16-EP MP3398AGY*** See Below SOIC20 * For Tape & Reel, add suffix Z (e.g. MP3398AGSZ) ** For Tape & Reel, add suffix Z (e.g. MP3398AGFZ) *** For Tape & Reel, add suffix Z (e.g. MP3398AGYZ) TOP MARKING (MP3398AGS) MPS: MPS prefix: YY: year code WW: week code: MP3398A: part number LLLLLLLLL: lot number TOP MARKING (MP3398AGF) MPS: MPS prefix: YY: year code WW: week code: MP3398A: part number LLLLLL: lot number TOP MARKING (MP3398AGY) MPS: MPS prefix: YY: year code WW: week code: MP3398A: part number LLLLLLLLL: lot number MP3398A Rev. 1.06 www.MonolithicPower.com 2 7/11/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2018 MPS. All Rights Reserved.