EVQ4425B-J-00A

EVQ4425B-J-00A High Efficiency 1.5A, 36V, 400kHz, Synchronous Step-Down LED Driver Evaluation Board DESCRIPTION FEATURES The EVQ4425B-J-00A is an evaluation board for the MPQ4425B-AEC1.   The MPQ4425B-AEC1 is a high-efficiency, synchronous, rectified, step-down, switch-mode white LED driver with built-in power MOSFETs. It offers a very compact solution to achieve 1.5A of continuous output current with excellent load and line regulation across a wide input supply range. The MPQ4425B-AEC1 has synchronous mode operation for high efficiency. The EVQ4425B-J-00A is a fully assembled and tested evaluation board, which generates load currents up to 1.5A from a 4V to 36V input range. ELECTRICAL SPECIFICATIONS Parameter Symbol Value Units Input voltage Output current VIN, VEMI IOUT 4 to 36 1.5 V A Wide 4V to 36V Operating Input Range 85mΩ High-Side and 50mΩ Low-Side Internal Power MOSFETs High-Efficiency Synchronous Mode Operation Default 400kHz Switching Frequency PWM Dimming (Minimum 100Hz Dimming Frequency) Forced CCM Mode 0.2V Reference Voltage Internal Soft Start Fault Indication for LED Short/Open, and Thermal Shutdown Over-Current Protection (OCP) with Valley Current Detection Thermal Shutdown Available in a TSOT23-8 Package CISPR25 Class 5 Compliant Available in 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 the MPS website under Quality Assurance. “MPS”, the MPS logo, and “Simple, Easy Solutions” are trademarks of Monolithic Power Systems, Inc. or its subsidiaries. EVQ4425B-J-00A EVALUATION BOARD Efficiency vs. Input Voltage VLED = 6.4V 96 EFFICIENCY (%) 94 92 90 88 ILED=1.5A 86 ILED=1A 84 ILED=0.8A ILED=0.5A 82 (LxWxH) 6.35cmx6.35cmx1.3cm Board Number MPS IC Number EVQ4425B-J-00A MPQ4425BGJ-AEC1 8 12 16 20 24 28 INPUT VOLTAGE (V) EVQ4425B-J-00A Rev. 1.0 MonolithicPower.com 7/30/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 32 36 1 EVQ4425B-J-00A – 36V/1.5A STEP-DOWN LED DRIVER EVALUATION BOARD QUICK START GUIDE 1. Connect the terminals of the LED to: a. Positive (+): LED+ b. Negative (-): LED2. Preset the power supply output between 4 and 36V, then turn the power supply off. If longer cables (>0.5m) are used between the source and the EVB, install a damping capacitor at the input terminals. This is strongly recommended when VIN ≥ 24V. 3. Connect the terminals of the power supply output to: a. Positive (+): VIN b. Negative (-): GND To improve EMI performance, connect the input power between VEMI and GND. 4. Turn the power supply on. The MPQ4425BGJ-AEC1 should automatically start up. 5. To use the enable function, apply a digital input to the EN pin. Drive EN above 1.45V to turn the regulator on; drive EN below 1V to turn it off. 6. To use the dimming function, apply a 100Hz to 2kHz external clock to the EN/DIM pin for PWM dimming. 7. The output current is set by the external resistor (RFB). If the feedback reference voltage is 0.2V, ILED can be calculated with Equation (1): ILED  0.2V RFB (1) Figure 1 shows the recommended feedback network. LED+ SW RT FB RFB LED- Figure 1: Feedback Network 8. RT sets the loop bandwidth. A lower RT results in higher bandwidth. However, a high bandwidth may cause insufficient phase margin, which results in an unstable loop. Choose a proper value for RT to make a tradeoff between bandwidth and phase margin. Table 1 lists the recommended feedback resistor and RT values for common outputs with 1-series or 2-series LEDs. Table 1: Recommended Resistor Values ILED (A) RFB (mΩ) RT (kΩ) 0.5 1 400 (1%) 200 (1%) 200 (1%) 150 (1%) 1.5 133 (1%) 100 (1%) EVQ4425B-J-00A Rev. 1.0 MonolithicPower.com 7/30/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 2 EVQ4425B-J-00A – 36V/1.5A STEP-DOWN LED DRIVER EVALUATION BOARD EVALUATION BOARD SCHEMATIC VIN 4V to 36V CIN5 dampens the input LC oscillation Input EMI Filter FB1 BLM41PG181SN1L L1 2.2 μH U1 2 VEMI CIN1 1nF CIN2 10nF CIN3 1μF CIN 4 10μF CIN5 22μF GND R1 499kΩ C1A 10μF 50V C1B 10μF 50V C1C 0.1μF 50V 1.45V EN/DIM Apply a 100Hz to 2kHz external clock to the EN/DIM pin for the PWM dimming. D1 Optional for High Duty Cycle R3 for EMI IN BST R4 20Ω 5 D1 NS NS C3 0.1 μF MPQ4425BGJ L2 2.2 μH 6 EN/ DIM SW 3 LED + 0.45V Hysteresis C4 10μF 16V R2 NS 4.9V 7 VCC C5 NS C6 NS C2 0.1μF R3 100kΩ /FT FB R5 200kΩ 8 LED - 4 1 /FAULT PGND 0.2V Open-drain output pulled low if an LED short, or open or thermal shutdown occurs. R6 400mΩ R7 400mΩ R8 400mΩ IOUT = VFB /(R5||R6||R7) Package Reference TOP VIEW 1 8 FB IN 2 7 VCC SW 3 6 EN/ DIM PGND 4 5 BST /FAULT Figure 2: Evaluation Board Schematic EVQ4425B-J-00A Rev. 1.0 MonolithicPower.com 7/30/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 3 EVQ4425B-J-00A – 36V/1.5A STEP-DOWN LED DRIVER EVALUATION BOARD EVQ4425B-J-00A BILL OF MATERIALS Qty Ref Value 1 CIN1 1nF 1 CIN2 10nF 1 CIN3 1μF 1 CIN4 10μF 1 CIN5 22μF 2 C1A, C1B 10μF 1 C1C 0.1μF 2 C2, C3 0.1μF 1 C4 10μF 2 1 C5, C6 D1 NS NS 1 FB1 1 L1 2.2μH 1 L2 10μH 1 1 1 1 499kΩ 100kΩ 20 200kΩ 400mΩ Film resistor, 1% 1 R1 R3 R4 R5 R6, R7, R8 R2 Bead, 180Ω at 100MHz, 3.5A Inductor, 82mΩ DCR, 3.3A Inductor, 84mΩ DCR, 3.1A Film resistor, 1% Film resistor, 1% Film resistor, 1% Film resistor, 1% 1 U1 3 5 3 VIN, VEMI, GND, GND, VOUT /FAULT, GND, EN/DIM Description Ceramic capacitor, 50V, X7R Ceramic capacitor, 50V, X7R Ceramic capacitor, 50V, X7R Ceramic capacitor, 50V, X7R Electrolytic capacitor, 63V Ceramic capacitor, 50V, X5R Ceramic capacitor, 50V, X7R Ceramic capacitor, 16V, X7R Ceramic capacitor, 16V, X7R NS MPQ4425Step-down regulator AEC1 Package Manufacturer Manufacturer P/N 0603 Murata GRM188R71H102KA01D 0603 Murata GRM188R71H103KA01D 1206 Murata GRM31MR71H105KA88L 1210 Murata GRM32ER71H106KA12L SMD Jianghai VTD-63V22 1206 Murata GRM31CR61H106KA12L 0603 Murata GRM188R71H104KA93D 0603 Murata GRM188R71C104KA01D 1210 Murata GRM32DR71C106KA01L 1812 Murata BLM41PG181SN1L SMD Toko DFE252012F-2R2MP2 SMD Coilcraft XAL4040-103MEB 0603 0603 0603 0603 Yageo Yageo Yageo Yageo RC0603FR-07499KL RC0603FR-07100KL RC0603FR-0720RL RC0603FR-07200KL 1206 Yageo RL1206FR-070R4L SOT23-8 MPS MPQ4425BGJ-AEC1 2.0mm golden pin Custom 2.54mm test pin Custom EVQ4425B-J-00A Rev. 1.0 MonolithicPower.com 7/30/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 4 EVQ4425B-J-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 = 10µH, fSW = 400kHz, TA = 25°C, unless otherwise noted. Efficiency vs. Input Voltage Efficiency vs. Input Voltage VLED = 6.4V 90 96 88 94 86 92 EFFICIENCY (%) EFFICIENCY (%) VLED = 3.2V 84 82 ILED=1.5A ILED=1A ILED=0.8A ILED=0.5A 80 78 90 88 ILED=1.5A 86 ILED=1A ILED=0.8A 84 ILED=0.5A 76 82 8 12 16 20 24 28 32 36 INPUT VOLTAGE (V) 8 12 16 20 24 28 32 36 INPUT VOLTAGE (V) Current Limit vs. Duty 6 CURRENT LIMIT (A) 5.5 5 4.5 4 3.5 3 2.5 2 0 10 20 30 40 50 60 70 80 90 DUTY (%) EVQ4425B-J-00A Rev. 1.0 MonolithicPower.com 7/30/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 5 EVQ4425B-J-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 = 10µH, fSW = 400kHz, TA = 25°C, unless otherwise noted. CISPR25 Class 5 Average Conducted Emissions CISPR25 Class 5 Peak Conducted Emissions 150kHz to 108MHz CISPR25 CLASS 5 LIMITS AVERAGE CONDUCTED EMI (dBµV) PEAK CONDUCTED EMI (dBµV) 150kHz to 108MHz 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 0 -5 -10 -15 -20 NOISE FLOOR Frequency (MHz) 1 0.1 108 10 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 0 -5 -10 -15 -20 CISPR25 CLASS 5 LIMITS NOISE FLOOR 150kHz to 30MHz 150kHz to 30MHz 60 60 55 55 AVERAGE RADIATED EMI (dBµV/m) PEAK RADIATED EMI (dBµV/m) 50 CISPR25 CLASS 5 LIMITS 50 45 40 35 30 25 20 15 10 NOISE FLOOR 5 45 40 35 25 20 15 10 5 0 -5 -5 1 0.1 NOISE FLOOR -10 30 Frequency (MHz) CISPR25 CLASS 5 LIMITS 30 0 -10 Frequency (MHz) 1 0.1 30 CISPR25 Class 5 Average Radiated Emissions CISPR25 Class 5 Peak Radiated Emissions Horizontal, 30MHz to 200MHz Horizontal, 30MHz to 200MHz 55 55 HORIZONTAL POLARIZATION 50 CISPR25 CLASS 5 LIMITS 40 35 30 25 20 15 10 NOISE FLOOR 5 HORIZONTAL POLARIZATION 50 AVERAGE RADIATED EMI (dBµV/m) PEAK RADIATED EMI (dBµV/m) 108 10 CISPR25 Class 5 Average Radiated Emissions CISPR25 Class 5 Peak Radiated Emissions 45 Frequency (MHz) 1 0.1 45 40 35 30 25 CISPR25 CLASS 5 LIMITS 20 15 10 5 0 0 -5 30 40 50 60 70 80 90 100 110 120 Frequency (MHz) 130 140 150 160 170 180 190 200 NOISE FLOOR -5 30 40 50 60 70 80 90 100 110 120 Frequency (MHz) 130 140 150 EVQ4425B-J-00A Rev. 1.0 MonolithicPower.com 7/30/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 160 170 180 190 200 6 EVQ4425B-J-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 = 10µH, fSW = 400kHz, TA = 25°C, unless otherwise noted. CISPR25 Class 5 Average Radiated Emissions CISPR25 Class 5 Peak Radiated Emissions Vertical, 30MHz to 200MHz Vertical, 30MHz to 200MHz 55 55 VERTICAL POLARIZATION 50 CISPR25 CLASS 5 LIMITS 40 35 30 25 20 15 10 NOISE FLOOR 5 45 40 35 30 25 15 10 0 -5 30 40 50 60 70 80 90 100 110 120 Frequency (MHz) 130 140 150 160 170 180 190 30 HORIZONTAL POLARIZATION 70 80 90 100 110 120 Frequency (MHz) 130 140 150 160 170 180 190 200 HORIZONTAL POLARIZATION 50 AVERAGE RADIATED EMI (dBµV/m) 45 PEAK RADIATED EMI (dBµV/m) 60 55 50 CISPR25 CLASS 5 LIMITS 35 30 25 20 15 NOISE FLOOR 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 NOISE FLOOR -5 1000 200 300 400 500 600 Frequency (MHz) 700 800 900 1000 900 1000 CISPR25 Class 5 Average Radiated Emissions CISPR25 Class 5 Peak Radiated Emissions Vertical, 200MHz to 1GHz Vertical, 200MHz to 1GHz 55 55 VERTICAL POLARIZATION 50 VERTICAL POLARIZATION 50 AVERAGE RADIATED EMI (dBµV/m) 45 PEAK RADIATED EMI (dBµV/m) 50 Horizontal, 200MHz to 1GHz Horizontal, 200MHz to 1GHz CISPR25 CLASS 5 LIMITS 35 30 25 20 15 10 40 CISPR25 Class 5 Average Radiated Emissions 55 40 NOISE FLOOR -5 200 CISPR25 Class 5 Peak Radiated Emissions 10 CISPR25 CLASS 5 LIMITS 20 5 0 40 VERTICAL POLARIZATION 50 AVERAGE RADIATED EMI (dBµV/m) PEAK RADIATED EMI (dBµV/m) 45 NOISE FLOOR 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 NOISE FLOOR -5 200 300 400 500 600 Frequency (MHz) 700 EVQ4425B-J-00A Rev. 1.0 MonolithicPower.com 7/30/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 800 7 EVQ4425B-J-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 = 10µH, fSW = 400kHz, TA = 25°C, unless otherwise noted. Steady State Start-Up through VIN ILED = 1.5A ILED = 1.5A CH2: VOUT 5V/div. CH3: VIN 5V/div. CH2: VOUT 5V/div. CH1: VSW 10V/div. CH3: ILED 1A/div. R1: V/FAULT 2V/div. CH1: VSW 10V/div. R1: IL 1A/div. CH4: IL 1A/div. CH4: ILED 1A/div. 2μs/div. 1ms/div. Shutdown through VIN Start-Up through EN ILED = 1.5A ILED = 1.5A CH3: VEN/DIM 2V/div. CH2: VOUT 5V/div. CH1: VSW 10V/div. CH3: VIN 5V/div. CH2: VOUT 5V/div. CH1: VSW 10V/div. R1: IL 1A/div. R1: IL 1A/div. CH4: ILED 1A/div. CH4: ILED 1A/div. 10ms/div. 1ms/div. Shutdown through EN PWM Dimming ILED = 1.5A fPWM = 200Hz CH3: VEN/DIM 2V/div. CH2: VOUT 5V/div. CH1: VSW 10V/div. CH3: VEN/DIM 2V/div. CH2: V/FAULT 5V/div. CH1: VSW 10V/div. CH4: ILED 2A/div. CH4: ILED 2A/div. R1: IL 1A/div. R1: IL 2A/div. 4μs/div. 2ms/div. EVQ4425B-J-00A Rev. 1.0 MonolithicPower.com 7/30/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 8 EVQ4425B-J-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 = 10µH, fSW = 400kHz, TA = 25°C, unless otherwise noted. PWM Dimming LED Open Steady State fPWM = 2kHz CH3: V/FAULT 2V/div. CH2: VOUT 5V/div. CH3: VEN/DIM 2V/div. CH2: V/FAULT 5V/div. CH1: VSW 10V/div. CH1: VSW 5V/div. CH4: ILED 2A/div. CH4: IL 200mA/div. R1: IL 2A/div. 200μs/div. 2μs/div. LED Open Input Start-Up LED Open Input Shutdown CH3: VIN 5V/div. CH1: VSW 5V/div. CH3: VIN 5V/div. CH1: VSW 5V/div. CH2: VOUT 5V/div. CH2: VOUT 5V/div. CH4: IL 1A/div. CH4: IL 1A/div. 1ms/div. 10ms/div. LED Open EN On LED Open EN Off CH3: VEN/DIM 2V/div. CH3: VEN/DIM 2V/div. CH1: VSW 5V/div. CH1: VSW 5V/div. CH2: VOUT 5V/div. CH4: IL 1A/div. CH2: VOUT 5V/div. CH4: IL 1A/div. 400μs/div. 4μs/div. EVQ4425B-J-00A Rev. 1.0 MonolithicPower.com 7/30/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 9 EVQ4425B-J-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 = 10µH, fSW = 400kHz, TA = 25°C, unless otherwise noted. LED Open Entry LED Open Recovery ILED = 1.5A ILED = 1.5A CH3: ILED 1A/div. CH3: ILED 5A/div. CH1: VSW 5V/div. CH1: VSW 5V/div. CH2: V/FAULT 5V/div. CH2: V/FAULT 5V/div. CH4: IL 2A/div. CH4: IL 2A/div. 20μs/div. 40μs/div. LED+ Short to GND Steady State LED+ Short to GND Input Start-Up CH3: VFAULT 5V/div. CH3: VIN 5V/div. CH1: VSW 5V/div. CH1: VSW 5V/div. CH2: VOUT 5V/div. CH2: V/FAULT 5V/div. CH4: IL 2A/div. CH4: IL 5A/div. 10μs/div. 1ms/div. LED+ Short to GND Input Shutdown LED+ Short to GND En On CH3: VEN/DIM 2V/div. CH3: VIN 5V/div. CH1: VSW 5V/div. CH2: V/FAULT 5V/div. CH1: VSW 5V/div. CH2: V/FAULT 5V/div. CH4: IL 5A/div. CH4: IL 5A/div. 10ms/div. 1ms/div. EVQ4425B-J-00A Rev. 1.0 MonolithicPower.com 7/30/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 10 EVQ4425B-J-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 = 10µH, fSW = 400kHz, TA = 25°C, unless otherwise noted. LED+ Short to GND Entry LED+ Short to GND En Off ILED = 1.5A CH3: ILED 1A/div. CH3: VEN/DIM 2V/div. CH2: V/FAULT 5V/div. CH2: V/FAULT 5V/div. CH1: VSW 5V/div. CH1: VSW 5V/div. CH4: IL 5A/div. CH4: IL 5A/div. 100μs/div. 40μs/div. LED+ Short to GND Recovery LED+ Short to LED- Entry ILED = 1.5A ILED = 1.5A CH3: ILED 1A/div. CH2: V/FAULT 5V/div. CH3: ILED 2A/div. CH2: V/FAULT 5V/div. CH1: VSW 5V/div. CH1: VSW 5V/div. CH4: IL 2A/div. CH4: IL 5A/div. 100μs/div. 10μs/div. LED+ Short to LED- Recovery ILED = 1.5A CH3: ILED 1A/div. CH2: V/FAULT 5V/div. CH1: VSW 5V/div. CH4: IL 2A/div. 20μs/div. EVQ4425B-J-00A Rev. 1.0 MonolithicPower.com 7/30/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 11 EVQ4425B-J-00A – 36V/1.5A STEP-DOWN LED DRIVER EVALUATION BOARD PCB LAYOUT Figure 3: Top Silk and Top Layer Figure 4: Inner Layer 1 Figure 5: Inner Layer 2 Figure 6: Bottom Silk and Bottom Layer EVQ4425B-J-00A Rev. 1.0 MonolithicPower.com 7/30/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 12 EVQ4425B-J-00A – 36V/1.5A STEP-DOWN LED DRIVER EVALUATION BOARD Revision History Revision # 1.0 Revision Date 7/30/2020 Description Initial Release Pages Updated - 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. EVQ4425B-J-00A Rev. 1.0 MonolithicPower.com 7/30/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 13