EVQ2483-Q-00A The Future of Analog IC Technology 55V, Programmable Frequency White LED Driver Evaluation Board AEC-Q100 Qualified DESCRIPTION FEATURES The MPQ2483 is a 55V, white LED driver suitable for either step-down or inverting step-up/down applications. It achieves 2.5A peak current over a wide input supply range with excellent load and line regulation. Current mode operation provides fast transient response and eases loop stabilization. Fault condition protection includes thermal shutdown, cycle-by-cycle peak current limiting, input over voltage protection, open strings protection and output short circuit protection. • The MPQ2483 incorporates both DC and PWM dimming onto a single control pin. The separate input reference ground pin allows for direct enable and/or dimming control for a positive to negative power conversion. • • • • • • • • Unique Step-up/down Operation (BuckBoost Mode) Wide 4.5V to 55V Operating Input Range for Step-Down Applications (Buck Mode) 0.28Ω Internal Power MOSFET Switch Adjustable Switching Frequency Analog and PWM Dimming 0.198V Reference Voltage 5μA Shutdown Mode No minimum LED required Stable with Low ESR Output Ceramic Capacitors Cycle-by-Cycle Over Current Protection Thermal Shutdown Protection Open Strings Protection Output Short Circuit Protection Available in 10-Pin 3x3 QFN Package The MPQ2483 is package in QFN10 (3 x 3)mm. • • • • • MPQ2483-Q DEMO BOARDS APPLICATIONS Board number Operating Mode Input (V) LED# ILED (mA) EVQ2483-Q-00A Buck-boost 12 1-4 700 EVQ2483-Q-00B Buck 15-50 3 700 EVQ2483-Q-00C Boost 12 6-9 500 • • • General LED Illuminations LCD Backlight Panels Automotive Lighting 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. EVQ2483-Q-00A EVALUATION BOARD (L x W x H) 5cm x 4.5cm x 0.7cm Board Number MPS IC Number EVQ2483-Q-00A MPQ2483DQ EVQ2483-Q-00A Rev.1.0 www.MonolithicPower.com 5/17/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 1 EVQ2483-Q-00A 55V, PROGRAMMABLE FREQUENCY WHITE LED DRIVER EVALUATION BOARD SCHEMATIC U1 1 VIN C3 NS R1 EN/DIM 0 INGND VDD R5 0 C6 100n SW EN/DIM 10 LED+ D1 B360 8 6 INGND RSET JP1 R3 75k BST 9 MPQ2483 7 R2 100 3 OVP FB VSS 2 COMP 4 C4 1nF C5 1nF R4 0 5 JP2 R8 120k open (short for buck_boost) R9 10k LEDR6 1 D2 B160 R7 400m short (open for buck_boost) EVQ2483-Q-00A BILL OF MATERIALS Qty 2 Reference Value C1, C2 2.2μF C3 NS 2 C4, C5 1nF 1 C6 0.1μF 1 C7 2.2μF 1 1 D1 D2 B360 B160 1 L1 10μH 3 1 1 1 1 1 1 1 R1, R4, R5 R2 R3 R6 R7 R8 R9 U1 0 100 75kΩ 1Ω 400mΩ 120kΩ 10k MPQ2483 1 EN/DIM, LED+, LED-,VIN, GND JP1, JP2 Description Ceramic Cap., 10%, X7R Package Manufacturer Manufacturer P/N 100V, 1210 muRata GRM32ER72A225KA35L Panasonica GRM188R71H102KA01D muRata GRM188R71E104KA01D muRata GRM31CR71H225KA88L Ceramic Cap., 50V, 0603 10%, X7R Ceramic Cap., 50V, 0603 10%, X7R Ceramic Cap., 50V, 1206 10%, X7R Schottky Rect., 60V,3A SMA Schottky Rect., 60V,1A SMA Inductor, Rdc 28mΩ, SMD Isat 4A Film Res., 5% 0603 Film Res., 5% 0603 Film Res., 1% 0603 Film Res.1% 0805 Film Res. 1% 0805 Film Res., 1% 0603 Film Res., 1% 0603 Power Led Driver QFN10 Diodes Inc Diodes Inc Wurth Elektronik Yageo Yageo Yageo ROYALOHM ROYALOHM Yageo Yageo MPS B360A-13-F B160-13-F 11 Pin Header, 2.54mm 2.54mm Sullins PCC11SAAN 744066100 RC0603JR-070RL RC0603JR-07100RL RC0603FR-0775KL RC0805FR-071RL 0808F400LT5E RC0603FR-07120KL RC0603FR-0710KL MPQ2483 NS EVQ2483-Q-00A Rev.1.0 www.MonolithicPower.com 5/17/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 2 EVQ2483-Q-00A 55V, PROGRAMMABLE FREQUENCY WHITE LED DRIVER EVB TEST RESULTS Buck Boost Mode, L =10µH, FSW = 330kHz, 3LED, IOUT = 0.7A, TA = 25°C, unless otherwise noted. 95 Efficiency vs. Input Voltage Efficiency vs. String Voltage LED Line Regulation 10 100 90 6LED 8 95 4LED 4 90 85 2LED -4 1LED 75 3LED -2 80 2LED 4LED 2 1LED 0 85 3LED 80 6LED 6 75 -6 70 0 -10 -8 70 0 10 20 30 40 50 VIN VOLTAGE (V) 5 10 15 20 25 LED STRING VOLTAGE (V) LED Regulation vs. LED String Voltage 10 20 30 40 50 INPUT VOLTAGE (V) Steady State VOUT with Temp VIN = 10V 8 0 VIN = 40V 6 4 VIN 10V/div. VIN 25V/div. VSW 20V/div. VSW 20V/div. VOUT 10V/div. VOUT 10V/div. IL 2A/div. IL 2A/div. 2 0 -2 -4 -6 -8 0 5 10 15 20 25 LED STRING VOLTAGE (V) Power Ramp Up Power Ramp Down VIN = 40V VIN = 40V VIN 25V/div. VIN 25V/div. VDIM 5V/div. VSW 50V/div. VSW 50V/div. VSW 20V/div. VOUT 10V/div. IOUT 1A/div. VOUT 10V/div. IOUT 1A/div. VOUT 10V/div. IOUT 1A/div. EVQ2483-Q-00A Rev.1.0 www.MonolithicPower.com 5/17/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 3 EVQ2483-Q-00A 55V, PROGRAMMABLE FREQUENCY WHITE LED DRIVER PRINTED CIRCUIT BOARD LAYOUT Figure 1—Top Layer Figure 2—Bottom Layer EVQ2483-Q-00A Rev.1.0 www.MonolithicPower.com 5/17/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 4 EVQ2483-Q-00A 55V, PROGRAMMABLE FREQUENCY WHITE LED DRIVER QUICK START GUIDE 1. Connect the load (3LEDs or less) to the output. The Anode of the load to “LED+” and the Cathode of the load to “LED -”. 2. Connect the input voltage source to the input VIN and INGND. The input voltage source should be initialed 10V - 45V. 3. Connect the EN or dimming signal to EN/Dim pin. For PWM dimming, connect the PWM signal to EN/Dim pin, the high level should be higher than 1.4V, the low level should be lower than 0.7V. For analog dimming, connect a DC dimming signal in range of 0.7V~1.4V to EN/Dim pin. 4. Power up the input voltage source, and then power up the EN/Dim signal, the LEDs should be ignited. NOTICE: The information in this document is subject to change without 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. EVQ2483-Q-00A Rev.1.0 www.MonolithicPower.com 5/17/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 5