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Step Down White LED Driver with Wide 6V–55V Input Voltage AEC-Q100 Qualified MPQ2489 Rev. 1.1 www.MonolithicPower.com 1 9/26/2016 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2016 MPS. All Rights Reserved. The Future of Analog IC Technology
DESCRIPTION
The MPQ2489 is a high efficiency step-down converter designed in continuous current mode for driving the high brightness Light Emitting Diodes (LED) from wide input voltage 6V–55V. The MPQ2489 employs hysteretic control architecture to regulate a high accuracy LED current, which is measured through an external high-side current sensing resistor. Moreover, this control scheme provides optimized circuit stabilization and very quick response time without the loop compensation. Its low 202mV average feedback voltage reduces power loss and improves the converter efficiency. The MPQ2489 implements PWM and analog dimming together with DIM pin. The MPQ2489 includes thermal overload protection preventing damage in the event of an output overload. The MPQ2489 is available in small QFN6 (3x 3mm) and SOIC8E packages.
FEATURES
Guaranteed Industrial/Automotive Temp Internal 60V MOSFET Wide 6V to 55V Input Range 1A Output Current High Efficiency (>95%) Hysteresis Control PWM & Analog Dimming 1000:1 PWM Dimming Resolution Thermal Shutdown Inherent Open LED Protection Short LED Protection Available in QFN6(3x 3mm) and SOIC8E Packages Available in AEC-Q100 Grade 1
APPLICATIONS
Low Voltage Halogen Replacement Low Voltage General Illumination Automotive/Decorative LED Lighting Signs/Emergency Lighting LED Backlighting 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. TYPICAL APPLICATION
MPQ2489 – STEP DOWN WLED DRIVER WITH WIDE 6V~55V INPUT VOLTAGE, AEC-Q100 QUALIFIED MPQ2489 Rev. 1.1 www.MonolithicPower.com 2 9/26/2016 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2016 MPS. All Rights Reserved.
ORDERING INFORMATION
Part Number Package Top Marking MPQ2489DQ* QFN-6 (3x3mm) 9Y MPQ2489DQ-AEC1 QFN-6 (3x3mm) 9Y MPQ2489DN-AEC1* SOIC8E MP2489 * For Tape & Reel, add suffix -Z (e.g. MPQ2489DQ-Z). For RoHS Compliant Packaging, add suffix -LF (e.g. MPQ2489DQ-LF-Z) For Tape & Reel, add suffix -Z (e.g. MPQ2489DQ-AEC1-Z). For RoHS Compliant Packaging, add suffix -LF (e.g. MPQ2489DQ-AEC1-LF-Z * For Tape & Reel, add suffix -Z (e.g. MPQ2489DN-AEC1-Z). For RoHS Compliant Packaging, add suffix -LF (e.g. MPQ2489DN-AEC1-LF-Z PACKAGE REFERENCE QFN-6 (3x 3mm) SOIC8E ABSOLUTE MAXIMUM RATINGS (1) Continuous Power Dissipation (TA = +25°C) (2) Recommended Operating Conditions (3) Operating Junction Temp. (TJ). -40°C to +125°C Thermal Resistance (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 T J(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.
MPQ2489 – STEP DOWN WLED DRIVER WITH WIDE 6V~55V INPUT VOLTAGE, AEC-Q100 QUALIFIED MPQ2489 Rev. 1.1 www.MonolithicPower.com 3 9/26/2016 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2016 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
VIN = 24V, TJ = -40C to +125C unless otherwise noted. Typical values are at TJ = 25°C. Parameter Symbol Condition Min Typ Max Units Input Voltage V IN 6 55 V Shutdown Supply Current I SD V IN = 24V TJ =25°C 85 108 µA TJ = -40°C to +125°C 130 Quiescent Supply Current I Q No Switching 1 mA Internal Reference Voltage V REF 1.23 1.275 1.32 V Feedback Reference Voltage (with respect to VIN) VIN-VRS V EN/DIM = 1.28V TJ =25°C 192 202 212 mV TJ = -40°C to +125°C 187 217 Feedback Reference Voltage Hysterisis VFB_HYS ±30 mV EN/DIM Max Dimming Voltage V DIM MAX 2.56 V EN/DIM Mim Dimming Voltage V DIM MIN 0.3 V EN/DIM Enable High Voltage V EN HIGH V EN Rising 0.3 V EN/DIM Enable Low Volatge V EN LOW V EN Falling 0.16 V EN/DIM Up-pulling Resistor R EN 45 k Ω Recommended PWM Dimming Frequency (5) FPWM 0.1 2 kHz Switch On Resistance R DS ON 0.5 Ω Minimum On Time (6) T ON MIN 100 ns Minimum Off Time (6) T OFF MIN 100 ns Recommended Maximum Operating Frequency FMAX 600 kHz Recommended Duty Cycle Range at FMAX (5) D 30 70 % Start Up Time T SS External capacitor on dim pin is 4.7nF 0.3 0.5 ms Notes: 5) Application recommendation, no production test. 6) Design Guarantee, no production test.
MPQ2489 – STEP DOWN WLED DRIVER WITH WIDE 6V~55V INPUT VOLTAGE, AEC-Q100 QUALIFIED MPQ2489 Rev. 1.1 www.MonolithicPower.com 4 9/26/2016 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2016 MPS. All Rights Reserved. PIN FUNCTIONS QFN6 Pin# SOIC8E Pin# Name Description 1 1 SW The Drain of Internal MOSFET. Connecting the common terminal of inductor and anode of Schottky to this pin. 2, 5 2, 3, 6, 7 GND Ground. 3 4 EN/DIM Enable/Dimming Command Input. To use PWM dimming, apply a square wave signal to this pin. To use Analog dimm ing, apply a 0.3V–2.5V DC voltage to this pin. The voltage from 0.3V to 2.5V linear ly controls the LED current range from 25% to 200%. Turn off the output curr ent when pulling this pin below 0.2V. Connect a 1nF–10nF capacitor for normal operation (VEN/DIM=1.28V). 4 5 RS LED Current Sense Input. Connecting the cu rrent sensing resistor that programs the LED average current to IN pin. 6 8 IN Input Supply Pin. Connecting a proper decoupling capacitor from IN pin to GND.
MPQ2489 – STEP DOWN WLED DRIVER WITH WIDE 6V~55V INPUT VOLTAGE, AEC-Q100 QUALIFIED MPQ2489 Rev. 1.1 www.MonolithicPower.com 5 9/26/2016 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2016 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS VIN=30V, 3 LEDS in series, IOUT=550mA, unless otherwise noted. -10 10 20 30 40 50 60 0.7 0.8 0.9 1.0 1.1 1.2 1.0 1.1 1.2 1.3 1.4 1.5 0.0 0.2 0.4 0.6 0.8 1.0 150 180 210 240 270 300 150 170 190 210 230 250 -40 -10 20 50 80 110 140 -40 -10 20 50 80 110 140 -40 -10 20 50 80 110 140 -40 -10 20 50 80 110 140 -40 -10 20 50 80 110 140 100 10 20 30 40 50 60 0 0.2 0.4 0.6 0.8 1.2 0 0.5 1 1.5 2 2.5 3 0 0.2 0.4 0.6 0.8 1.2
MPQ2489 – STEP DOWN WLED DRIVER WITH WIDE 6V~55V INPUT VOLTAGE, AEC-Q100 QUALIFIED MPQ2489 Rev. 1.1 www.MonolithicPower.com 6 9/26/2016 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2016 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS (CONTINUED) VIN=30V, 3 LEDS in series, IOUT=550mA, unless otherwise noted. 100 200 300 400 500 0 2 04 06 08 0 1 0 0 PWM DIMMING DUTY (%) VIN=15V VIN=30V
MPQ2489 – STEP DOWN WLED DRIVER WITH WIDE 6V~55V INPUT VOLTAGE, AEC-Q100 QUALIFIED MPQ2489 Rev. 1.1 www.MonolithicPower.com 7 9/26/2016 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2016 MPS. All Rights Reserved. FUNCTION DIAGRAM Figure 1—MPQ2489 Function Block Diagram
9/26/2016 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2016 MPS. All Rights Reserved. varies applications ranging from 6V–55V input. and output current upper-threshold is fixed by R1. R2 determines the current hysteresis. automatically start up to the maxim brightness. the analog dimming can be easily employed. dimming control mode section. EN/DIM pin to ground provides a soft-start delay. dimming and DC analog dimming. 0.3V–2.5V DC voltage to this pin. Table 1. I
MPQ2489 – STEP DOWN WLED DRIVER WITH WIDE 6V~55V INPUT VOLTAGE, AEC-Q100 QUALIFIED MPQ2489 Rev. 1.1 www.MonolithicPower.com 10 9/26/2016 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2016 MPS. All Rights Reserved. Figure 4—Inductor selection instruction for QFN-6
MPQ2489 – STEP DOWN WLED DRIVER WITH WIDE 6V~55V INPUT VOLTAGE, AEC-Q100 QUALIFIED MPQ2489 Rev. 1.1 www.MonolithicPower.com 12 9/26/2016 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2016 MPS. All Rights Reserved.
PACKAGE INFORMATION
QFN6 (3mm x 3mm)
MPQ2489 – STEP DOWN WLED DRIVER WITH WIDE 6V~55V INPUT VOLTAGE, AEC-Q100 QUALIFIED NOTICE: The information in this document is subject to change wi thout notice. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. MPQ2489 Rev. 1.1 www.MonolithicPower.com 13 9/26/2016 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2016 MPS. All Rights Reserved. SOIC8E SEE DETAIL "A" 0.0075(0.19) 0.0098(0.25) 0.050(1.27) BSC 0.013(0.33) 0.020(0.51) SEATING PLANE 0.000(0.00) 0.006(0.15) 0.051(1.30) 0.067(1.70) TOP VIEW FRONT VIEW SIDE VIEW BOTTOM VIEW NOTE: 1) CONTROL DIMENSION IS IN INCHES. DIMENSION IN BRACKET IS IN MILLIMETERS. 2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. 3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. 4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.004" INCHES MAX. 5) DRAWING CONFORMS TO JEDEC MS-012, VARIATION BA. 6) DRAWING IS NOT TO SCALE. 0.089(2.26) 0.101(2.56) 0.124(3.15) 0.136(3.45) RECOMMENDED LAND PATTERN 0.213(5.40) 0.063(1.60) 0.103(2.62) 0.138(3.51) 0.150(3.80) 0.157(4.00)PIN 1 ID 0.189(4.80) 0.197(5.00) 0.228(5.80) 0.244(6.20)14 0.016(0.41) 0.050(1.27)0o-8o DETAIL "A" 0.010(0.25) 0.020(0.50) x 45o 0.010(0.25) BSC GAUGE PLANE