MPQ3387LGRT-Z

MPQ3387L Step-up, 6 strings, Max. 45mA/string, Combined Analog and PWM dimming, White LED Driver AEC-Q100 Qualified The Future of Analog IC Technology DESCRIPTION FEATURES The MPQ3387L is a step-up converter with 6channel current sources. It is designed for driving the white LED arrays as backlighting of middle or large size LCD panel. • The MPQ3387L uses peak-current mode as its PWM control architecture. The switching frequency can be programmed by a resistor. It generates an output voltage up to 45V from a 3V to 25V input supply. The MPQ3387L independently regulates the current in each LED string to the value set by an external current-setting resistor. The MPQ3387L applies 6 internal current sources in each LED string terminal to achieve a current balance with 3% current regulation accuracy between strings. Its low 500mV regulation voltage on LED current sources reduces power loss. The MPQ3387L features external digital PWM dimming and analog dimming, both of which sharing a single input with 25% PWM duty cycle as a transfer point. The mix-dimming strategy helps to improve the dimming ratio. Also, MPQ3387L automatically transfers the PWM input signal 100Hz to 20kHz frequency to 24kHz to 27.5kHz to eliminate the audible noise. MPQ3387L has rich protection modes to guarantee safety operation. The protection modes include recoverable OCP (over-current protection), OVP (over-voltage protection), OTP (over-temperature protection), any string of LED short and open protection. Guaranteed Industrial/Automotive Temperature Range Limits 6-String, Max 45mA/String 3V to 25V Input Voltage Range 3% Current Matching Accuracy Between Strings Programmable Switching Frequency Selectable Combined Analog and PWM Dimming Mode or Pure PWM Dimming Mode Combined Analog and PWM Dimming Mode with 25% Dimming Transfer Point 24kHz to 27.5kHz Output Dimming Frequency to eliminate audible noise Cascading Capability with a Single Power Source Programmable Over-Voltage Protection Recoverable Thermal Shutdown Protection Cycle by Cycle Over Current Protection Fault Indicator Signal Output(Optional) Under-Voltage Lockout TQFN24 (4X4mm) Package Available in AEC-Q100 Qualified Grade 1 • • • • • • • • • • • • • • • APPLICATIONS • • • • Notebook PC Small LCD TV Portable 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 Products, Quality Assurance page. “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. The MPQ3387L is available in TQFN244mmX4mm package. MPQ3387L Rev. 1.01 www.MonolithicPower.com 10/8/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 1 MPQ3387L ― STEP UP, 6STRINGS, WHITE LED DRIVER, AEC-Q100 QUALIFIED TYPICAL APPLICATION MPQ3387L Rev. 1.01 www.MonolithicPower.com 10/8/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 2 MPQ3387L ― STEP UP, 6STRINGS, WHITE LED DRIVER, AEC-Q100 QUALIFIED ORDERING INFORMATION Part Number MPQ3387LGRT* MPQ3387LGRT-AEC1** Package TQFN-24 (4mm X4mm) TQFN-24 (4mm X4mm) Top Marking See Below * For Tape & Reel, add suffix –Z (e.g. MPQ3387LGRT-Z): ** For Tape & Reel, add suffix –Z (e.g. MPQ3387LGRT–AEC1-Z): TOP MARKING MPS: MPS prefix: Y: year code; WW: week code: M3387L: product code of MPQ3387LGRT; LLLLLL: lot number; PACKAGE REFERENCE LX LX NC COMP VIN VCC TOP VIEW EN PGND FREQ PGND NC Exposed Pad Connected to GND MIX OVP LED1 LED4 ISET LED5 LED3 LED6 PWMI NC LED2 NC AGND TQFN24 (4X4mm) MPQ3387L Rev. 1.01 www.MonolithicPower.com 10/8/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 3 MPQ3387L ― STEP UP, 6STRINGS, WHITE LED DRIVER, AEC-Q100 QUALIFIED ABSOLUTE MAXIMUM RATINGS (1) Thermal Resistance VPWMI, VEN, VIN ...............................-0.3V to +30V VCC .............................................-0.3V to +6.5V VLX, VLED1 to VLED6 ............................-1V to +50V All Other Pins .................................–0.3V to +6V Junction Temperature ...............................150°C Lead Temperature ....................................260°C (2) Continuous Power Dissipation (TA = 25°C) TQFN-24 (4mmX4mm) .............................. 2.9W TQFN-24 (4mm X4mm)……...42……..9....°C/W Recommended Operating Conditions (3) Supply Voltage VIN ..............................3V to 25V Operating Junction Temp. ....... -40°C to +125°C (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-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. MPQ3387L Rev. 1.01 www.MonolithicPower.com 10/8/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 4 MPQ3387L ― STEP UP, 6STRINGS, WHITE LED DRIVER, AEC-Q100 QUALIFIED ELECTRICAL CHARACTERISTICS (5) VIN =12V, VEN = 5V, TJ = -40ºC to + 125°C, unless otherwise noted. Typical values are at TA = 25°C. 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 VCC UVLO Threshold VIN_UVLO Typ 3 Max Units 25 V 1.6 mA 1 VEN=5V, 6V