MP3394ES-LF

MP3394 Step-up, 4-String Max 200mA/String White LED Driver The Future of Analog IC Technology DESCRIPTION FEATURES The MP3394 is a step-up controller with 4channel current sources designed for driving the WLED arrays for large size LCD panel backlighting applications. The MP3394 is flexible for extending LED channels with two or more MP3394s in parallel while operating from a single inductor power source. • • • • • • • • The MP3394 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 MP3394 regulates the current in each LED string to the programmed value set by an external current setting resistor. • • • 4-String, Max 200mA/String WLED Driver 5V to 28V Input Voltage Range 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 Cascading Capability with a Single Power Source Under Voltage Lockout Thermal Shutdown TSSOP16EP，SOIC16, SOIC20 Package APPLICATIONS • • • The MP3394 applies 4 internal current sources for current balance and the current matching can achieve 2.5% regulation accuracy between strings. Its low 350mV regulation voltage on LED current sources reduces power loss and improves efficiency. 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. 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. TYPICAL APPLICATION D1 L1 VIN 5V~28V CIN COUT R1 15 CVCC C COMP RCOMP Enable VIN GATE 1 5 VCC COMP ISENSE RSENSE OSC MP3394 GND OVP 7 13 EN R OSC BOSC LED1 4 12 11 C BOSC LED2 DIMMING 3 RSET MP3394 Rev. 1.07 3/21/2013 M1 R2 16 2 RBOSC 14 6 DBRT LED3 ISET LED4 10 9 8 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 1 MP3394—4-STRING, MAX 200mA/STRING WHITE LED DRIVER ORDERING INFORMATION Part Number Package Top Marking MP3394EF* MP3394ES** MP3394EY*** TSSOP16EP SOIC16 SOIC20 MP3394 MP3394 MP3394 *For Tape & Reel, add suffix –Z (e.g. MP3394EF–Z). For RoHS compliant packaging, add suffix –LF (e.g. MP3394EF–LF–Z) **For Tape & Reel, add suffix –Z (e.g. MP3394ES–Z). For RoHS compliant packaging, add suffix –LF (e.g. MP3394ES–LF–Z) ***For Tape & Reel, add suffix –Z (e.g. MP3394EY–Z). For RoHS compliant packaging, add suffix –LF (e.g. MP3394EY–LF–Z) PACKAGE REFERENCE TOP VIEW COMP 1 20 VCC EN 2 19 VIN DBRT 3 18 GATE NC 4 17 ISENSE 5 16 NC NC 6 15 NC OSC 7 14 OVP ISET 8 13 LED1 BOSC 9 12 LED2 LED4 10 11 LED3 GND TSSOP16EP SOIC20 SOIC16 (4) ABSOLUTE MAXIMUM RATINGS (1) Thermal Resistance VIN .................................................-0.3V to +30V VGATE ..............................................-0.5V to 6.8V VCC .................................................-0.5V to 6.8V VLED1 to VLED4 ....................................-1V to +55V All Other Pins ...............................-0.3V to +6.3V (2) Continuous Power Dissipation (TA = +25°C) TSSOP16EP………………………………...2.78 W SOIC16 ……………………………………1.56 W SOIC20 …………………………………… 1.74W Junction Temperature ...............................150°C Lead Temperature ....................................260°C Storage Temperature............... -65°C to +150°C TSSOP16EP ...........................45 ...... 10 ... °C/W Recommended Operating Conditions (3) Supply Voltage VIN ..............................5V to 28V LED Current (Backlight) ...........10mA to 180mA Operating Junction Temp. (TJ). -20°C to +125°C MP3394 Rev. 1.07 3/21/2013 θJA θJC SOIC16 ...................................80 ...... 35 ... °C/W SOIC20 ...................................72 ...... 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. © 2013 MPS. All Rights Reserved. 2 MP3394—4-STRING, MAX 200mA/STRING WHITE LED DRIVER ELECTRICAL CHARACTERISTICS VIN =12V, VEN = 5V, TA = +25°C, unless otherwise noted. Parameters Symbol Operating Input Voltage Condition Min VIN 5 Supply Current (Quiescent) IQ VIN=12V, VEN=5V, no load with switching Supply Current (Shutdown) IST VEN=0V, VIN=12V LDO Output Voltage VCC Input UVLO Threshold VIN_UVLO VEN=5V, 0