MP3398AGF-Z

MP3398A Step up, 4 strings, Max. 350mA/string Analog and PWM dimming, White LED Controller DESCRIPTION The MP3398A is a step-up controller with 4 current channels, which is designed to drive WLED arrays for large-size LCD-panel backlighting applications. It is flexible to expand the number of LED channels by two or more ICs in parallel sharing a single inductive power source. The MP3398A uses peak-current mode with fixed switching frequency. The frequency is programmable by an external setting resistor. The MP3398A drives an external MOSFET to boost up the output voltage from a 5V to 28V input supply. It regulates the current in each LED string to the value set by an external current-setting resistor. The MP3398A applies 4 internal current sources for current balance. The current matching can achieve 2.5% regulation accuracy between strings. Its low regulation voltage on LED current sources reduces power loss. The MP3398A can support both analog and PWM dimming independently to meet the different dimming-mode request. In addition, rich protection modes are also integrated including OCP, OTP, UVP, OVP, LED short/open protection, inductor/diode short protection. FEATURES    4-String, Max 350mA/String WLED Driver 5V to 28V Input Voltage Range 2.5% Current Matching Accuracy Between Strings Programmable Switching Frequency PWM and Analog Dimming Mode Cascading Capability with a Single Power Source LED Open and Short LED Protection Programmable Over-Voltage Protection Recoverable Thermal Shutdown Protection Over Current Protection Inductor/Diode short Protection Under-Voltage Lockout SOIC16, TSSOP16-EP and SOIC20 Packages           APPLICATIONS    Desktop LCD Flat Panel Displays Flat Panel Video Displays 2D/3D LCD TVs and Monitors 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. The MP3398A is available in SOIC16, TSSOP16-EP and SOIC20 packages. TYPICAL APPLICATION MP3398A Rev. 1.06 www.MonolithicPower.com 7/11/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 1 STEP UP, 4 STRINGS, MAX. 350MA/STRING ANALOG AND PWM DIMMING, WHITE LED CONTROLLER ORDERING INFORMATION Part Number MP3398AGS* MP3398AGF** MP3398AGY*** Package SOIC16 TSSOP16-EP SOIC20 Top Marking See Below See Below See Below * For Tape & Reel, add suffix –Z (e.g. MP3398AGS–Z); ** For Tape & Reel, add suffix –Z (e.g. MP3398AGF–Z); *** For Tape & Reel, add suffix –Z (e.g. MP3398AGY–Z); TOP MARKING (MP3398AGS) MPS: MPS prefix: YY: year code; WW: week code: MP3398A: part number; LLLLLLLLL: lot number; TOP MARKING (MP3398AGF) MPS: MPS prefix: YY: year code; WW: week code: MP3398A: part number; LLLLLL: lot number; TOP MARKING (MP3398AGY) MPS: MPS prefix: YY: year code; WW: week code: MP3398A: part number; LLLLLLLLL: lot number; MP3398A Rev. 1.06 www.MonolithicPower.com 7/11/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 2 STEP UP, 4 STRINGS, MAX. 350MA/STRING ANALOG AND PWM DIMMING, WHITE LED CONTROLLER PACKAGE REFERENCE TOP VIEW TOP VIEW COMP 1 16 VCC COMP 1 16 VCC 2 15 VIN EN 2 15 VIN PWM 3 14 GATE PWM 3 14 GATE GND 4 13 ISENSE GND 4 13 I SENSE OSC 5 12 OVP OSC 5 12 OVP ISET 6 11 LED1 ISET 6 11 LED1 ADIM 7 10 LED2 ADIM 7 10 LED2 8 9 LED3 LED4 8 9 LED3 EN LED 4 SOIC16 Exposed Pad Connect to GND TSSOP16-EP SOIC20 ABSOLUTE MAXIMUM RATINGS (1) Thermal Resistance VIN .............................................. -0.3V to +30V VGATE ........................................... -0.3V to +6.5V VCC ............................................ -0.3V to +6.8V VLED1 to VLED4 .................................. -1V to +55V VISENSE ......................................... -0.5V to +6.5V All Other Pins ............................... –0.3V to VCC (2) Continuous Power Dissipation (TA = 25°C) SOIC16 .................................................... 1.56W TSSOP16-EP………………………………2.78W SOIC20 ………………………………… 1.74W Junction Temperature .............................. 150°C Lead Temperature ................................... 260°C Storage temperature ................ -60°C to +150°C ESD Capability Human Body Mode (all pins) ................................................................. 3.5kV SOIC16……………………………80……35....°C/W TSSOP16-EP……………………45…….10….°C/W SOIC20 ……………………72 ...... 30 ... C/W Recommended Operating Conditions (4) θJA θJC Notes: 1) Exceeding these ratings may damage the device. The voltage is measured with a 20MHz bandwidth limited oscilloscope. 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 operating conditions. 4) Measured on JESD51-7, 4-layer PCB. (3) Supply Voltage VIN ............................. 5V to 28V LED Current (Backlight) ...........10mA to 350mA Operating Junction Temp. (TJ). -40°C to +125°C MP3398A Rev. 1.06 www.MonolithicPower.com 7/11/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 3 STEP UP, 4 STRINGS, MAX. 350MA/STRING ANALOG AND PWM DIMMING, WHITE LED CONTROLLER ELECTRICAL CHARACTERISTICS (5) VIN =12V, VEN = 5V, TA = 25°C, unless otherwise noted. Parameters Symbol Condition Operating Input Voltage VIN Supply Current (Quiescent) IQ Supply Current (Operation) IOP VIN=12V, VEN=5V, no load without switching VIN=12V, VEN=5V, no load with switching Supply Current (Shutdown) IST VEN=0V, VIN=12V LDO Output Voltage VCC VCC UVLO Threshold VIN_UVLO Min Max Units 28 V 1.35 1,5 mA 3 5.5 mA 0.01 0.5 μA 5.4 6 6.6 V 3.6 4 4.4 V 5 VEN=5V, 7V