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MP3399EY Datasheet(PDF) 1 Page - Monolithic Power Systems |
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MP3399EY Datasheet(HTML) 1 Page - Monolithic Power Systems |
1 / 19 page MP3399 12-String, Cascading White LED Driver For Extending LED Channels MP3399 Rev. 1.0 www.MonolithicPower.com 1 3/27/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. The Future of Analog IC Technology DESCRIPTION The MP3399 is a step-up controller with 12- channel current sources designed for driving the WLED arrays for large size LCD panel backlighting applications. The MP3399 is flexible for extending LED channels with two or more MP3399s in parallel while operating from a single Inductor power source. The MP3399 uses current mode, fixed frequency architecture. The switching frequency is programmable by an external frequency setting resistor. It drives an external MOSFET to boost up the output voltage from a 5V to 28V input supply. The MP3399 regulates the current in each LED string to the programmed value set by an external current setting resistor. The MP3399 applies 12 internal current sources for current balance. And the current matching can achieve 2.5% regulation accuracy between strings. Its low 600mV regulation voltage on LED current sources reduces power loss and improves efficiency. PWM dimming is implemented with external PWM input signal or DC input signal. The dimming PWM signal can be generated internally, and the dimming frequency is programmed by an external setting capacitor. FEATURES • 12 String, 60mA/String WLED Driver • Cascading Capability with a single Power Source • 5V to 28V Input Voltage Range • Maximum 60mA for Each String • 2.5% Current Matching Accuracy Between Strings • Programmable Switching Frequency • PWM or DC Input Burst PWM Dimming • Open and Short LED Protection • Programmable Over-voltage Protection • Under Voltage Lockout • Thermal Shutdown • 28-pin TSSOP and 28-pin SOIC Package APPLICATIONS • Desktop LCD Flat Panel Displays • Flat Panel Video Displays • LCD TVs and Monitors All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Quality Assurance. “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. |
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