EVQ4425A-QB-00A

EVQ4425A-QB-00A High Efficiency 1.5A, 36V, 2.2MHz Synchronous Step-Down LED Driver Evaluation Board DESCRIPTION FEATURES The EVQ4425A-QB-00A is an evaluation board for the MPQ4425A-AEC1 and MPQ4425A. • MPQ4425A-AEC1/MPQ4425A is a highefficiency, synchronous, rectified, step-down, switch-mode white LED driver with built-in power MOSFETs. It offers a very compact solution to achieve a 1.5A continuous output current with excellent load and line regulation over a wide input supply range. The MPQ4425A has synchronous mode operation to get high efficiency. • The EVQ4425A-QB-00A is a fully assembled and tested evaluation board, which generates load current up to 1.5A from a 4V to 36V input range. ELECTRICAL SPECIFICATION Parameter Symbol Value Units Input Voltage Output Current VEMI ILED 4 - 36 1.5 V A • • • • • • • • • • • • Wide 4V to 36V Operating Input Range 85mΩ High-Side, 50mΩ Low-Side Internal Power MOSFETs High-Efficiency Synchronous Mode Operation Default 2.2MHz Switching Frequency PWM Dimming (Min 100Hz Dimming Frequency) Force CCM Mode 0.2V Reference Voltage Internal Soft-Start Fault Indication for LED Short, Open and Thermal Shutdown Over-Current Protection (OCP) with ValleyCurrent Detection Proprietary Switching-Loss-Reduction Technology Thermal Shutdown Available in a QFN-13 (2.5mmx3mm) Package CISPR25 Class5 Compliant AEC-Q100 Grade-1 APPLICATIONS • Automotive LED Lighting 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. EVQ4425A-QB-00A Rev.1.1 MonolithicPower.com 9/9/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 1 EVQ4425A-QB-00A 36V/1.5A STEP-DOWN LED DRIVER EVALUATION BOARD EVQ4425A-QB-00A EVALUATION BOARD (L × W × H) 6.35cm x 6.35cm x 1.3cm Board Number MPS IC Number EVQ4425A-QB-00A MPQ4425AGQB-AEC1 EVQ4425A-QB-00A Rev.1.1 MonolithicPower.com 9/9/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 2 EVQ4425A-QB-00A 36V/1.5A STEP-DOWN LED DRIVER EVALUATION BOARD QUICK START GUIDE 1. Connect the positive and negative terminals of the LED to the LED+ and LED- pins, respectively. 2. Preset the power supply output to between 4 and 36V, and then turn it off. If longer cables are used between the source and the EVB (>0.5m total), a damping capacitor should be installed at the input terminals. Especially when Vin is ≥ 24V. 3. Connect the positive and negative terminals of the power supply output to the VIN and GND pins, respectively. To get better EMI performance, connect the input power between VEMI and GND. 4. Turn the power supply on. The MPQ4425AGQB will automatically startup. 5. To use the Enable function, apply a digital input to the EN pin. Drive EN higher than 1.45V to turn on the regulator, drive EN less than 1V to turn it off. 6. To use the Dimming function, apply a 100Hz to 2kHz external clock to the EN/DIM pin for the PWM dimming. 7. The output current is set by the external resistor RFB, Feedback reference voltage is 0.2V, ILED is then given by below equation: I LED = 0.2V R FB LED+ SW RT FB RFB LED- Figure 1: Feedback Network 8. RT is used to set the loop bandwidth. Basically, lower RT, higher bandwidth. But high bandwidth may cause insufficient phase margin, resulting in loop unstable. So a proper value of RT is needed to make a trade-off between bandwidth and phase margin. Below table lists the recommended feedback resistor and RT values for common output with 1 or 2 series LED. ILED (A) RFB (mΩ) RT (kΩ) 0.5 400(1%) 200 (1%) 1 200(1%) 150 (1%) 1.5 133(1%) 100 (1%) EVQ4425A-QB-00A Rev.1.1 MonolithicPower.com 9/9/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 3 EVQ4425A-QB-00A 36V/1.5A STEP-DOWN LED DRIVER EVALUATION BOARD EVALUATION BOARD SCHEMATIC L1 NS, short 4V- 36V L1 2.2uH VIN VEMI CIN1 NS CIN2 NS CIN3 NS CIN4 NS CIN6 NS 0805 CIN5 2.2uF 50V CIN7 22uF 0805 GND U1 VIN 1,2 R1 1M C1A 10uF 50V C1B 10uF 50V 0805 0805 C1C 0.1uF 50V IN BST R3 20 10 D1 NS NS C1D 0.1uF 50V C3 0.1uF 16V MPQ4425 AGQB L2 2.2uH 5 EN/DIM EN/DIM SW LED + R2 NS 7 GND / FT AGND 4 11,12,13 /FAULT NC C2A 4.7uF 16V C2B 4.7uF 16V 0805 0805 C5 10nF 50 V 3 C6 NS C7 NS C4 0.1uF 16V FB R4 6 LED 200K 8 R8 100K VCC L3 240nH 9 R5 400m R6 400m R7 400m Package Reference PGND PGND PGND BST 13 12 11 10 IN 1 IN 2 9 SW 8 AGND 7 VCC 3 4 5 6 NC /FAULT EN /DIM FB EVQ4425A-QB-00A Rev.1.1 MonolithicPower.com 9/9/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 4 EVQ4425A-QB-00A 36V/1.5A STEP-DOWN LED DRIVER EVALUATION BOARD EVQ4425A-QB-00A BILL OF MATERIALS Qty Designator Value Description Package Manufacture Manufacturer_PN 1 CIN5 2.2uF Ceramic Capacitor, 50V, X7R 0805 TDK C2012X7R1H225K 1 CIN7 22uF Electrolytic Capacitor, 50V SMD Cotronic UT1H220M0605VG 2 C1A, C1B 4.7uF Ceramic Capacitor, 50V, X7S 0805 Murata GRM21BC71H475KE11L 2 C1C, C1D 0.1uF Ceramic Capacitor, 50V, X7R 0603 Murata GRM188R71H104KA93D 2 C2A, C2B 4.7uF Ceramic Capacitor, 16V, X7R 0805 Murata GCM21BR71C475KA73L 2 C3, C4 0.1uF Ceramic Capacitor, 25V, X7R 0603 Murata GCJ188R71E104KA12D 1 C5 10nF Ceramic Capacitor, 25V, X7R 0603 Wurth 885012206065 7 CIN1, CIN2, CIN3, CIN4, CIN6, C6, C7 NS 1 D1 NS 1 L1 Short 2 L2, L3 2.2uH Inductor, 70mOhm DCR, 2.6A SMD Cyntec VCUW25201B-2R2MS5 1 L4 240nH Inductor, 27mOhm DCR, 6.5A SMD Cyntec VCUW20161B-R24MS5 1 R1 1M Film Resistor, 5% 0603 Yageo RC0603JR-071ML 1 R3 20 Film Resistor, 1% 0603 Yageo RC0603FR-0720RL 1 R4 200K Film Resistor, 1% 0603 Yageo RC0603FR-07200KL 3 R5, R6, R7 400m Film Resistor, 1% 1206 Yageo RL1206FR-070R4L 1 R8 100K Film Resistor, 1% 0603 Yageo RC0603FR-07100KL 1 R2 NS 1 U1 Step-Down Regulator QFN13 (2mmX3mm) MPS MPQ4425AGQB-AEC1 4 VEMI, GND, LED+, LED- 2.0mm Golden Pin HZ 3 EN/DIM, GND, /FAULT 2.54mm Test Pin HZ EVQ4425A-QB-00A Rev.1.1 MonolithicPower.com 9/9/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 5 EVQ4425A-QB-00A 36V/1.5A STEP-DOWN LED DRIVER EVALUATION BOARD EVB TEST RESULTS Performance waveforms are tested on the evaluation board. VIN = 12V, LOAD=2 series LED, L=2.2µH, FSW=2.2MHz, TA = +25°C, unless otherwise noted. CISPR25 CLASS 5 PEAK CONDUCTED CISPR25 CLASS 5 AVERAGE CONDUCTED EMISSIONS EMISSIONS 150kHZ to 108MHz 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 0 -5 -10 -15 -20 150kHZ to 108MHz 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 0 -5 -10 -15 -20 Frequency (MHz) 1 0.1 108 10 Frequency (MHz) 1 0.1 CISPR25 CLASS 5 PEAK RADIATED EMISSIONS 108 10 CISPR25 CLASS 5 AVERAGE RADIATED EMISSIONS 150kHZ to 30MHz 150kHZ to 30MHz 60 60 55 55 CISPR25 CLASS 5 LIMITS 50 AVERAGE RADIATED EMI (dBuV/m) 50 PEAK RADIATED EMI (dBuV/m) CISPR25 CLASS 5 LIMITS AVERAGE CONDUCTED EMI (dBuV) PEAK CONDUCTED EMI (dBuV) CISPR25 CLASS 5 LIMITS 45 40 35 30 25 20 15 10 5 45 40 35 CISPR25 CLASS 5 LIMITS 30 25 20 15 10 5 0 0 -5 -5 -10 1 0.1 Frequency (MHz) 30 -10 1 0.1 Frequency (MHz) 30 CISPR25 CLASS 5 PEAK RADIATED EMISSIONS CISPR25 CLASS 5 AVERAGE RADIATED EMISSIONS Horizontal, 30MHz to 200MHz Horizontal, 30MHz to 200MHz 55 50 CISPR25 CLASS 5 LIMITS AVERAGE RADIATED EMI (dBuV/m) PEAK RADIATED EMI (dBuV/m) 45 55 HORIZONTAL POLARIZATION 50 40 35 30 25 20 15 10 HORIZONTAL POLARIZATION 45 40 35 30 25 CISPR25 CLASS 5 LIMITS 20 15 10 5 5 0 0 -5 30 40 50 60 70 80 90 100 110 120 Frequency (MHz) 130 140 150 160 170 180 190 200 -5 30 40 50 60 70 80 90 100 110 120 Frequency (MHz) 130 140 150 EVQ4425A-QB-00A Rev.1.1 MonolithicPower.com 9/9/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 160 170 180 190 200 6 EVQ4425A-QB-00A 36V/1.5A STEP-DOWN LED DRIVER EVALUATION BOARD EVB TEST RESULTS (continued) Performance waveforms are tested on the evaluation board. VIN = 12V, LOAD=2 series LED, L=2.2µH, FSW=2.2MHz, TA = +25°C, unless otherwise noted. CISPR25 CLASS 5 PEAK RADIATED CISPR25 CLASS 5 AVERAGE RADIATED EMISSIONS EMISSIONS Vertical, 30MHz to 200MHz 55 VERTICAL POLARIZATION 50 CISPR25 CLASS 5 LIMITS AVERAGE RADIATED EMI (dBuV/m) PEAK RADIATED EMI (dBuV/m) 55 VERTICAL POLARIZATION 50 45 Vertical, 30MHz to 200MHz 40 35 30 25 20 15 10 45 40 35 30 25 CISPR25 CLASS 5 LIMITS 20 15 10 5 5 0 0 -5 30 40 50 60 70 80 90 100 110 120 Frequency (MHz) 130 140 150 160 170 180 190 200 -5 30 40 50 60 70 80 90 100 110 120 Frequency (MHz) 130 140 150 160 170 180 CISPR25 CLASS 5 PEAK RADIATED EMISSIONS CISPR25 CLASS 5 AVERAGE RADIATED EMISSIONS Horizontal, 200MHz to 1GHz Horizontal, 200MHz to 1GHz 55 40 CISPR25 CLASS 5 LIMITS 35 30 25 20 15 10 5 45 40 35 30 25 CISPR25 CLASS 5 LIMITS 20 15 10 5 0 0 -5 200 300 400 500 600 Frequency (MHz) 700 800 900 1000 -5 200 300 400 500 600 Frequency (MHz) 700 800 900 CISPR25 CLASS 5 PEAK RADIATED EMISSIONS CISPR25 CLASS 5 AVERAGE RADIATED EMISSIONS Vertical, 200MHz to 1GHz Vertical, 200MHz to 1GHz 55 CISPR25 CLASS 5 LIMITS 35 30 25 20 15 10 5 1000 VERTICAL POLARIZATION 50 AVERAGE RADIATED EMI (dBuV/m) PEAK RADIATED EMI (dBuV/m) 40 55 VERTICAL POLARIZATION 50 45 200 HORIZONTAL POLARIZATION 50 AVERAGE RADIATED EMI (dBuV/m) PEAK RADIATED EMI (dBuV/m) 45 55 HORIZONTAL POLARIZATION 50 190 45 40 35 30 25 CISPR25 CLASS 5 LIMITS 20 15 10 5 0 0 -5 200 300 400 500 600 Frequency (MHz) 700 800 900 1000 -5 200 300 400 500 600 Frequency (MHz) 700 EVQ4425A-QB-00A Rev.1.1 MonolithicPower.com 9/9/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 800 900 1000 7 EVQ4425A-QB-00A 36V/1.5A STEP-DOWN LED DRIVER EVALUATION BOARD EVB TEST RESULTS (continued) Performance waveforms are tested on the evaluation board. VIN = 12V, LOAD=2 series LED, L=2.2µH, FSW=2.2MHz, TA = +25°C, unless otherwise noted.(1) Note: 1). All the efficiency curves are tested on EVB without input and output filters. EVQ4425A-QB-00A Rev.1.1 MonolithicPower.com 9/9/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 8 EVQ4425A-QB-00A 36V/1.5A STEP-DOWN LED DRIVER EVALUATION BOARD EVB TEST RESULTS(continued) Performance waveforms are tested on the evaluation board. VIN = 12V, LOAD=2 series LED, L=2.2µH, FSW=2.2MHz, TA = +25°C, unless otherwise noted. EVQ4425A-QB-00A Rev.1.1 MonolithicPower.com 9/9/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 9 EVQ4425A-QB-00A 36V/1.5A STEP-DOWN LED DRIVER EVALUATION BOARD EVB TEST RESULTS(continued) Performance waveforms are tested on the evaluation board. VIN = 12V, LOAD=2 series LED, L=2.2µH, FSW=2.2MHz, TA = +25°C, unless otherwise noted. EVQ4425A-QB-00A Rev.1.1 MonolithicPower.com 9/9/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 10 EVQ4425A-QB-00A 36V/1.5A STEP-DOWN LED DRIVER EVALUATION BOARD EVB TEST RESULTS(continued) Performance waveforms are tested on the evaluation board. VIN = 12V, LOAD=2 series LED, L=2.2µH, FSW=2.2MHz, TA = +25°C, unless otherwise noted. EVQ4425A-QB-00A Rev.1.1 MonolithicPower.com 9/9/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 11 EVQ4425A-QB-00A 36V/1.5A STEP-DOWN LED DRIVER EVALUATION BOARD PRINTED CIRCUIT BOARD LAYOUT Figure 2: Top Silk and Top Layer Figure 3: Inner1 Layer Figure 4: Inner2 Layer Figure 5: Bottom Silk and Bottom Layer NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications. 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. EVQ4425A-QB-00A Rev.1.1 MonolithicPower.com 9/9/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 12