EVL2491N-QB-00A MPS | Alldatasheet
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32V, 6A, High-Efficiency, Synchronous Step-Down Converter Evaluation Board EVL2491N-QB-00A Rev. 1.0 MonolithicPower.com 1 9/8/2022 MPS Proprietary Information. Patent Protected. Unautho rized Photocopy and Duplication Prohibited. © 2022 MPS. All Rights Reserved.
DESCRIPTION
The EVL2491N-QB-00A evaluation board is designed to demonstrate the capabilities of the MP2491N, a fully integrated, high-voltage step- down converter. The MP2491N can achieve 6A of continuous output current (I OUT), with excellent load and line regulation across a wide input supply range. Constant-on-time (COT) control provides fast transient response, easy loop design, and tight output regulation. Full protection features include over-current protection (OCP), current limiting with hiccup mode, output over-voltage protection (OVP), and thermal shutdown. The MP2491N requires a minimal number of readily available, standard external components, and is available in a QFN-13 (2.5mmx3mm) package. PERFORMANCE SUMMARY (1) Specifications are at TA = 25°C, unless otherwise noted. Parameters Conditions Value Input voltage (VIN) range 16V to 32V Output voltage (VOUT) V IN = 16V to 32V, IOUT = 0A to 6A V OUT = 5V Maximum output current (IOUT) V IN = 16V to 32V 6A Typical efficiency V IN = 24V, VOUT = 5V, IOUT = 6A 91.9% Peak efficiency V IN = 24V, VOUT = 5V, IOUT = 2A 94.7% Switching frequency (fSW) 540kHz Optimized Performance with MPS Inductor MPL-AY1050 Series EVL2491N-QB-00A EVALUATION BOARD LxWxH (6.35cmx6.35cmx1.3cm) Board Number MPS IC Number EVL2491N-QB-00A MP2491NGQB
EVL2491N-QB-00A – 32V, 6A, STEP-DOWN CONVERTER EVALUATION BOARD EVL2491N-QB-00A Rev. 1.0 MonolithicPower.com 2 9/8/2022 MPS Proprietary Information. Patent Protected. Unautho rized Photocopy and Duplication Prohibited. © 2022 MPS. All Rights Reserved. QUICK START GUIDE The EVL2491N-QB-00A evaluation board is easy to set up and use to evaluate the performance of the MP2491N. For proper measurement equipment set-up, refer to Figure 1 and follow the steps below: 1. Preset the power supply to 24V, then turn off the power supp ly. 2. Connect the power supply terminals to: a. Positive (+): VIN b. Negative (-): GND 3. Connect the load terminals to: a. Positive (+): VOUT b. Negative (-): GND 4. After making the connections, turn on the power supply. The board should automatically start up. 5. Check for the proper output voltage (V OUT) between the VOUTSENSE and GNDSEN terminals. 6. The converter’s default mode is set to automatic pulse-frequ ency modulation (PFM) and pulse- width modulation (PWM) mode. Select a different mode by adjusting the MODE pin (see Table 1). Table 1: Mode Selection Pin Voltage Mode 0V Forced PWM VCC Auto-PFM/PWM 7. Once the proper V OUT is established, adjust the load within the operating range and measure the efficiency, output ripple voltage, and other parameters. Note: 1) Ensure that V IN does not exceed 32V. VIN = 16V to 32V Load = 0A to 6A V VIN Measurement V VOUT Measurement Figure 1: Proper Measurement Equipment Set-Up
EVL2491N-QB-00A – 32V, 6A, STEP-DOWN CONVERTER EVALUATION BOARD EVL2491N-QB-00A Rev. 1.0 MonolithicPower.com 3 9/8/2022 MPS Proprietary Information. Patent Protected. Unautho rized Photocopy and Duplication Prohibited. © 2022 MPS. All Rights Reserved. EVALUATION BOARD SCHEMATIC SWIN FBMP2491N MODE BST PG AGND PGND VIN VCC 4.7µH 22µFEN 1µF 2.2µF NC SS 102kΩ 11.3kΩ VOUT 300kΩ PG 100kΩ VCC 24.9kΩ 15nF 24V VCC C1C 0.1µF 10µF C1A 10µF C1B 10µF 1N5819 C2A 22µF C2B 22µF C2C 22µFC5 22pF C1D 100µF Optional Ensure the DC source or VOUT is <6V and ≥5V (3) Figure 2: Evaluation Board Schematic Notes: 2) The EN resistor divider sets the V IN rising threshold to 16V. For low VIN applications, change R5. 3) D1 is an optional diode that can be used to achieve high eff iciency under light loads.
EVL2491N-QB-00A – 32V, 6A, STEP-DOWN CONVERTER EVALUATION BOARD EVL2491N-QB-00A Rev. 1.0 MonolithicPower.com 4 9/8/2022 MPS Proprietary Information. Patent Protected. Unautho rized Photocopy and Duplication Prohibited. © 2022 MPS. All Rights Reserved. EVL2491N-QB-00A BILL OF MATERIALS Qty R e f Value Description Packa ge Manufacture r Manufacturer PN
3 C1, C1A,
C1B 10μF Ceramic capacitor, 35V, X5R 0805 Murata GRM21BR61E106KA43L
1 C1C 100nF Ceramic capacitor,
50V, X7R 0603 Samsung CL05B104KB5NNNC
1 C1D 100μF Electrolytic capacitor,
50V DIP Wurth 860010674014
4 C2, C2A,
C2B, C2C 22μF Ceramic capacitor, 25V, X5R 0805 Murata GRM31CR61E226KE15L 1 C3 2.2μF Ceramic capacitor, 16V, X7S 0603 Murata GRM188C71C225KE11D
1 C4 1μF Ceramic capacitor,
50V, X7R 0603 Murata GRM188R71A105KA61D
1 C5 22pF Ceramic capacitor,
50V, C0G 0603 Murata GRM1885C1H220JA01D
1 C6 15nF Ceramic capacitor,
50V, X7R 0603 Murata GRM188R71H153KA01D
1 R1 102kΩ Film resistor, 1% 0603 Ya geo RC0603FR-07102KL
1 R6 100kΩ Film resistor, 1% 0603 Ya geo RC0603FR-07100KL
1 R2 11.3kΩ Film resistor, 1% 0603 Ya geo RC0603FR-0711K3L
1 R3 0Ω Film resistor, 1% 0603 Ya geo RC0603FR-070RL
1 R4 300kΩ Film resistor, 1% 0603 Ya geo RC0603FR-07300KL
1 R5 24.9kΩ Film resistor, 1% 0603 Ya geo RC0603FR-0724K9L
1 D1 NS
Inductor, 4.7μH, DCR = 9.5mΩ, ISAT = 15A 11mmx 10mmx 4.8mm MPS MPL-AY1050-4R7
1 U1 MP2491
N 32V, 6A, synchronous step-down converter QFN-13 (2.5mmx 3mm) MPS MP2491NGQB
EVL2491N-QB-00A – 32V, 6A, STEP-DOWN CONVERTER EVALUATION BOARD EVL2491N-QB-00A Rev. 1.0 MonolithicPower.com 5 9/8/2022 MPS Proprietary Information. Patent Protected. Unautho rized Photocopy and Duplication Prohibited. © 2022 MPS. All Rights Reserved. EVB TEST RESULTS Performance curves and waveforms are tested on the evaluation b oard. V IN = 24V, V OUT = 5V, TA = 25°C, unless otherwise noted. 100 0.001 0.01 0.1 1 10 EFFICIENCY (%) LOAD CURRENT (A) Efficiency vs. Load Current VOUT = 5V, L = 4.7μH, DCR = 9.5mΩ VIN=12V VIN=24V VIN=32V 100 0246 CASE TEMPERATURE RISE (℃) LOAD CURRENT (A) Case Temperature Rise vs. Load Current VOUT = 5V, L = 4.7μH, DCR = 9.5mΩ, 63.5mmx63.5mm , 4-layer PCB
EVL2491N-QB-00A – 32V, 6A, STEP-DOWN CONVERTER EVALUATION BOARD EVL2491N-QB-00A Rev. 1.0 MonolithicPower.com 6 9/8/2022 MPS Proprietary Information. Patent Protected. Unautho rized Photocopy and Duplication Prohibited. © 2022 MPS. All Rights Reserved. EVB TEST RESULTS (continued) Performance curves and waveforms are tested on the evaluation b oard. V IN = 24V, V OUT = 5V, TA = 25°C, unless otherwise noted. Output Voltage Ripple VIN = 24V, VOUT = 5V, IOUT = 0A Output Voltage Ripple VIN = 24V, VOUT = 5V, IOUT = 0A CH1: VOUT/AC CH2: VIN CH3: VSW CH4: IL CH1: VOUT/AC CH2: VIN CH3: VSW CH4: IL Output Voltage Ripple VIN = 24V, VOUT = 5V, IOUT = 6A Load Transient Response VIN = 24V, VOUT = 5V, IOUT = 0A to 3A, 2.5A/μs with e-load CH1: VOUT/AC CH2: VIN CH3: VSW CH4: IL CH1: V OUT/AC CH4: IOUT Load Transient Response VIN = 24V, VOUT = 5V, IOUT = 0A to 6A, 2.5A/μs with e-load CH1: V OUT/AC CH4: IOUT
EVL2491N-QB-00A – 32V, 6A, STEP-DOWN CONVERTER EVALUATION BOARD EVL2491N-QB-00A Rev. 1.0 MonolithicPower.com 8 9/8/2022 MPS Proprietary Information. Patent Protected. Unautho rized Photocopy and Duplication Prohibited. © 2022 MPS. All Rights Reserved. PCB LAYOUT (continued) Figure 7: Bottom Layer
EVL2491N-QB-00A – 32V, 6A, STEP-DOWN CONVERTER EVALUATION BOARD Notice: The information in this document is subject to change without notice. Please contact MPS for current specifications. Users should warrant and guarant ee that third-party Intellectua l Property rights are not infri nged upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. EVL2491N-QB-00A Rev. 1.0 MonolithicPower.com 9 9/8/2022 MPS Proprietary Information. Patent Protected. Unautho rized Photocopy and Duplication Prohibited. © 2022 MPS. All Rights Reserved.
REVISION HISTORY
Revision # Revision Date Description Pages Updated 1.0 9/8/2022 Initial Release -