EVQ7200-L-00A 42V, 3A Synchronous, Buck Mode LED Driver Evaluation Board DESCRIPTION FEATURES The EVQ7200-L-00A is an evaluation board for Wide 6V to 42V Operating Input Range the MPQ7200-AEC1, a high-frequency, Configurable 3A Maximum Continuous constant-current LED driver with integrated Output Current in Buck Mode power MOSFETs. It offers a compact solution 44m/40m Internal Power MOSFETs to achieve 3A of continuous output current, with Default 2.3MHz Switching Frequency for excellent load and line regulation over a wide Buck Mode with Spread Spectrum input supply range. 100Hz to 2kHz Dimming Frequency for Pulse-Width Modulation (PWM) Dimming Constant frequency hysteretic control mode 500Hz Internal 2-Step Dimming with provides fast transient response without loop Programmable Duty Cycle compensation. In buck mode, the MPQ7200- Fault Indication for LED Short, LED Open, AEC1s switching frequency (up to 2.3MHz) reduces ripple current and electromagnetic Output Over-Voltage, and Thermal Shutdown interference (EMI). Over-Current Protection (OCP) with Latch- The MPQ7200-AEC1 is available in a QFN-19 Off (3mmx4mm) wettable flank package and is Programmable Thermal Derating via AEC-Q100 Grade 1 qualified. Negative Temperature Coefficient (NTC) The EVQ7200-L-00A is a fully assembled and Remote Temperature Sensing tested buck mode LED driver evaluation board. EMI Reduction Technique It generates an LED current up to 3A from a 6V Available in a QFN-19 (3mmx4mm) to 42V input range. Wettable Flank Package Available in AEC-Q100 Grade 1 ELECTRICAL SPECIFICATIONS APPLICATIONS Parameter Symbol Value Units Input voltage V 6 to 42 V Automotive LED Lighting EMI Output current I 3 A OUT 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. EVQ7200-L-00A EVALUATION BOARD 2 LEDs (VLED = 6V), MOSFET cutoff when I = 0.5A LED 96 7.0 93 6.0 90 5.0 87 ILED=3A 4.0 ILED=2A ILED=1.2A 84 ILED=0.75A 3.0 ILED=0.5A 81 2.0 78 1.0 75 0.0 LxWxH (9cmx9cmx1.3cm) 8 101214161820 Board Number MPS IC Number INPUT VOLTAGE (V) EVQ7200-L-00A MPQ7200GLE-AEC1 Efficiency vs input voltage EVQ7200-L-00A Rev. 1.0 MonolithicPower.com 1 1/4/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2021 MPS. All Rights Reserved. EFFICIENCY (%) POWER LOSS (W)EVQ7200-L-00A 42V, 3A BUCK MODE LED DRIVER EVALUATION BOARD QUICK START GUIDE 1. Preset the power supply between 6V and 42V, then turn off the power supply. 2. If longer cables (>0.5m total) are being used between the source and the evaluation board, install a damping capacitor at the input terminals. This is critical when V exceeds 24V. EMI 3. Connect the power supply terminals to: a. Positive (+): VEMI b. Negative (-): GND 4. Connect the load terminals to: a. Positive (+): VLED+ b. Negative (-): VLED- 5. After making the connections, turn on the power supply. 6. To use the enable (EN) function, apply a digital input to the EN/DIM pin. Drive EN above 2.5V to turn on the regulator on drive EN below 1V to turn it off. 7. When 2-step dimming is off (R = 4.87k), an external 100Hz to 2kHz pulse-width modulation DUTY (PWM) waveform can be applied to the EN/DIM pin. 8. Use the EN/DIM pin to start the 2-step dimming function. When EN/DIM is high, the dimming duty cycle is 100%. When EN/DIM is low, the dimming duty cycle percentage varies (see Table 1). Table 1 shows the proposed resistor (R3) in E96 series for different dimming duty cycles. Table 1: 2-Step Dimming Duty vs. R3 2-Step R3 () Dimming Duty 15% 61900 14% 41200 13% 27400 12% 18200 11% 12100 10% 7870 2-step dimming off 4870 9% 3090 8% 2050 7% 1370 6% 887 5% 576 9. Set the LED current with the external resistor connected to the ISET pin. The value of the external resistor can be calculated with Equation (1): 16 R5 (k) (1) I(A) LED EVQ7200-L-00A Rev. 1.0 MonolithicPower.com 2 1/4/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2021 MPS. All Rights Reserved.