MP2161GJ-P

MP3384 50V, 4-String White LED Driver The Future of Analog IC Technology DESCRIPTION FEATURES The MP3384 is a step-up converter with 4-channel current sources designed for driving the white LED arrays for large size LCD panel backlighting applications. • • • • • The MP3384 uses current mode, fixed frequency architecture. The switching frequency can be selected at 1.25MHz or 625kHz. It generates an output voltage up to 50V from a 4.5V to 25V input supply. The MP3384 independently regulates the current in each LED string to the user programmed value set by an external current setting resistor. The MP3384 applies 4 internal current sources to achieve a current balance of 2.5% regulation accuracy between strings. Its low 600mV regulation voltage on LED current sources reduces power loss and improves efficiency. The MP3384 includes under voltage lockout, current limiting, over voltage, short LED, open LED and thermal shut-down protection. The MP3384 is available in small (3mmx 3mm) package. QFN16 • • • • • • • High Efficiency and Small Size 4.5V to 25V Input Voltage Range 50V Maximum Step-up Voltage Balanced Driver for 4 Strings of WLED 2.5% Current Matching Accuracy Between Strings Selectable Switching Frequency: 1.25MHz or 625kHz PWM Dimming Programmable Over-voltage Protection Under Voltage Lockout Open and Short LED Protection Thermal Shutdown Small 16-pin QFN (3mm x 3mm) APPLICATIONS • • • • • Notebook PC Netbook PC Digital Picture Frames Handy Terminals Display Automotive System and Tablet Computer 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. TYPICAL APPLICATION MP3384 Rev. 1.01 1/29/2013 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 1 MP3384- 50V, 4-STRING WHITE LED DRIVER ORDERING INFORMATION Part Number* Package QFN16 (3mm X 3mm) MP3384EQ Top Marking 5S * For Tape & Reel, add suffix –Z (e.g. MP3384EQ–Z). For RoHS compliant packaging, add suffix –LF (e.g. MP3384EQ–LF–Z) PACKAGE REFERENCE TOP VIEW PIN 1 ID VIN VCC COMP 16 15 14 SW 13 EN 1 12 PGND OSC 2 11 NC ISET 3 10 OVP GND 4 9 LED4 5 6 7 8 PWM LED1 LED2 LED3 EXPOSED PAD CONNECT TO PIN 12 ABSOLUTE MAXIMUM RATINGS (1) Thermal Resistance VIN .................................................-0.3V to +30V VSW, VLED1 to VLED4............................-1V to +50V All Other Pins ..................................-0.3V to +6V (2) Continuous Power Dissipation (TA = +25°C) ………………………………………………....2.1W Junction Temperature ...............................150°C Lead Temperature ....................................260°C Storage Temperature............... -65°C to +150°C QFN16 (3mm x 3mm) ...........60 ...... 12 ... °C/W Recommended Operating Conditions (3) Supply Voltage VIN ...........................4.5V to 25V Max LED Current/String............................ 40mA Operating Junction Temp. (TJ). -40°C to +125°C MP3384 Rev. 1.01 1/29/2013 (4) θJA θJC Notes: 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the maximum junction temperature TJ (MAX), the junction-to-ambient thermal resistance θJA, and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by PD (MAX) = (TJ (MAX)-TA)/θJA. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. 3) The device is not guaranteed to function outside of its operation conditions. 4) Measured on JESD51-7, 4-layer PCB. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 2 MP3384- 50V, 4-STRING WHITE LED DRIVER ELECTRICAL CHARACTERISTICS VIN =12V, VEN = 5V, TA = +25°C, unless otherwise noted. Parameters Symbol Condition Min Operating Input Voltage VIN Supply Current (Quiescent) IQ VIN=12V, VEN=5V, no load. Supply Current (Shutdown) IST VEN=0V, VIN=12V LDO Output Voltage VCC Input UVLO Threshold VIN_UVLO Typ 4.5 VEN=5V, 0