R OVP1 R OVP2 MP24833 3A, 55V White LED Driver The Future of Analog IC Technology DESCRIPTION FEATURES The MP24833 is a 55V, 3A, white LED driver 3A Maximum Output Current suitable for step-down, inverting step-up/down Unique Step-Up/Down Operation (Buck- and step-up applications. It achieves 3A output Boost Mode) current over a wide input supply range with Wide 4.5V-to-55V Operating Input Range excellent load and line regulation. Current mode for Step-Down Applications (Buck Mode) operation provides fast transient response and 0.19 Internal Power MOSFET Switch eases loop stabilization. Fault condition Fixed 200kHz Switching Frequency protection includes thermal shutdown, Analog and PWM Dimming cycle-by-cycle peak current limiting, open strings 0.198V Reference Voltage protection and output short circuit protection. 6 A Shutdown Mode The MP24833 incorporates both DC and PWM No Minimum Number of LEDs Required dimming onto a single control pin. The separate Stable with Low ESR Output Ceramic input reference ground pin allows for direct Capacitors enable and/or dimming control for a positive to Cycle-by-Cycle Over-Current Protection negative power conversion. Thermal Shutdown Protection The MP24833 requires a minimal number of Open Strings Protection readily-available standard external components Output Short-Circuit Protection and is available in an SOIC8E package. Available in an SOIC8E Package APPLICATIONS General LED Illumination LCD Backlight Panels Notebook Computers Automotive Internal Lighting Portable Multimedia Players Portable GPS Devices All MPS parts are lead-free, halogen 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. TYPICAL APPLICATION 3 OVP 1 7 VIN VDD BST C BST CIN 8 SW 5 L EN/DIM EN/DIM C ON o D OFF DC or PWM Input 6 4 INGND FB VSS R FB 2 MP24833 Rev. 1.03 www.MonolithicPower.com 1 05/05/2010 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2016 MPS. All Rights Reserved. LEDsMP24833 3A, 55V WHITE LED DRIVER ORDERING INFORMATION Part Number* Package Top Marking MP24833GN SOIC-8 EP MP24833 * For Tape & Reel, add suffix Z (e.g. MP24833GNZ). PACKAGE REFERENCE SOIC8E (1) (4) ABSOLUTE MAXIMUM RATINGS Thermal Resistance JA JC Supply Voltage V - V ............................. 60V SOIC-8 EP ..............................50 ...... 10... C/W DD SS V - V ...............................-0.3V to V + 0.3V SW SS IN Notes: V ...................................................... V + 6V BST SW 1) Exceeding these ratings may damage the device. V - V .................................-0.3V to +6V EN/Dim INGND 2) The maximum allowable power dissipation is a function of the maximum junction temperature T (MAX), the junction-to- J V - V .....................................-0.3V to 60V INGND SS ambient thermal resistance , and the ambient temperature JA Other pins - V ...............................-0.3V to +6V SS T . The maximum allowable continuous power dissipation at A (2) any ambient temperature is calculated by P (MAX) = (T D J Continuous Power Dissipation (T = +25C) A (MAX)-T )/ . Exceeding the maximum allowable power A JA SOIC8E...................................................... 2.5W dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal Junction Temperature...............................150C shutdown circuitry protects the device from permanent Lead Temperature ....................................260C damage. Storage Temperature............... -65C to +150C 3) The device function is not guaranteed outside of the recommended operating conditions. (3) 4) Measured on JESD51-7, 4-layer PCB. Recommended Operating Conditions Supply Voltage V - V .................4.5V to 55V DD SS Operating Junction Temp. (T ). -40C to +125C J MP24833 Rev. 1.03 www.MonolithicPower.com 2 05/05/2010 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2016 MPS. All Rights Reserved.