MP3386DR-LF-P

MP3386 50V, 6 String White LED Driver The Future of Analog IC Technology FEATURES DESCRIPTION • • • • • The MP3386 is a step-up converter with 6channel current sources designed for driving the white LED arrays for large size LCD panel backlighting applications. The MP3386 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 MP3386 regulates the current in each LED string to the user programmed value set by an external current setting resistor. • • • • • • • The MP3386 applies 6 internal current sources in each LED string terminal to get current balance. And the current matching achieves 3% regulation accuracy between strings. Its low 600mV regulation voltage on LED current sources reduces power loss and improves efficiency. High Efficiency and Small Size 4.5V to 25V Input Voltage Range 50V Maximum Step-up Voltage Balanced Driver for 6 Strings of WLED 3% Current Matching Accuracy Between Strings Selectable Switching Frequency: 1.25MHz or 625kHz PWM or DC Input Burst PWM Dimming Programmable Over-voltage Protection Threshold Under Voltage Lockout Open and Short LED Protection Thermal Shutdown Small QFN24 (4x4mm) and 28-pin SOIC Package APPLICATIONS • • • • The MP3386 features external PWM dimming or DC input PWM dimming, which allows the flexible control of the backlighting luminance under wide range of the ambient brightness, and also avoids the possibility of PWM dimming audible noise. The dimming PWM signal can be generated internally, and the dimming frequency is programmed by an external setting capacitor. Notebook & Netbook PC Small LCD TV 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 M1 D1 L1 VIN C1 4.5V~25V R1 C2 R2 C4 C3 24 VCC Enable 1 NC 2 3 4 C5 22 VIN 21 COMP VFAULT 20 SW1 19 SW2 EN PGND1 OSC PGND2 FSET OVP MP3386 PWMO VOUT 18 17 16 15 C6 5 PWM DIMMING 23 6 GND NC PWMI LED6 7 LED1 LED5 LED4 LED3 ISET 8 9 10 11 14 13 LED2 12 R SET MP3386 Rev. 1.0 1/19/2012 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 1 MP3386- 50V, 6 STRINGS WHITE LED DRIVERS ORDERING INFORMATION Part Number Top Marking Free Air Temperature (TA) MP3386DR* Package QFN24 (4x4mm) 3386DR -40°C to +85°C MP3386EY** SOIC28 3386EY -20°C TO +85°C * For Tape & Reel, add suffix –Z (e.g. MP3386DR–Z). For RoHS Compliant Packaging, add suffix –LF (e.g. MP3386DR–LF–Z) * * For Tape & Reel, add suffix –Z (e.g. MP3386EY–Z). For RoHS Compliant Packaging, add suffix –LF (e.g. MP3386EY–LF–Z) PACKAGE REFERENCE TOP VIEW VCC VIN COMP VFAULT SW1 SW2 TOP VIEW 24 23 22 21 20 19 VFAULT 1 28 SW1 COMP 2 27 NC VIN 3 26 SW2 EN 1 18 PGND1 VCC 4 25 NC OSC 2 17 PGND2 EN 5 24 PGND1 FSET 3 16 OVP OSC 6 23 PGND2 PWMO 4 15 VOUT GND 5 14 PWM1 6 13 7 22 OVP 8 21 VOUT NC AGND 9 20 NC LED1 PWMI 10 19 LED1 12 LED6 11 18 LED2 LED2 11 ISET 10 LED3 9 LED4 8 LED5 LED6 7 FSET PWMO LED5 12 17 NC LED4 13 16 ISET LED3 14 15 NC EXPOSED PAD CONNECT TO GND QFN24 (4x4mm) SOIC28 ABSOLUTE MAXIMUM RATINGS (1) VIN .................................................-0.3V to +30V VVFAULT ...........................................VIN - 6V to VIN VSW, VOUT, VLED1 to VLED6 ..................-1V to +50V All Other Pins ..................................-0.3V to +6V (2) Continuous Power Dissipation (TA = +25°C) QFN24 (4x4mm)…………………………….2.9W SOIC28…………………………… ….…....2.1W Junction Temperature ...............................150°C Lead Temperature ....................................260°C Storage Temperature............... -65°C to +150°C Recommended Operating Conditions (3) Supply Voltage VIN ...........................4.5V to 25V Maximum Junction Temp. (TJ) .............. +125°C MP3386 Rev. 1.0 1/19/2012 Thermal Resistance (4) θJA θJC QFN24 (4x4mm) ....................42 ....... 9 .... °C/W SOIC28 ..................................60 ...... 30 ... °C/W 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-toambient 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. © 2012 MPS. All Rights Reserved. 2 MP3386- 50V, 6 STRINGS WHITE LED DRIVERS 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