EV2759-Q-01A

EV2759-Q-01A 36V Switching Charger with Power Path Management for 1-Cell to 6-Cell Batteries Evaluation Board DESCRIPTION FEATURES The EV2759-Q-01A is an evaluation board for the MP2759, a highly integrated switching charger designed for portable devices with 1cell to 6-cell series Li-ion or Li-polymer battery packs. It can achieve up to 3A of charge current, and supports a variety of battery chemistry types with different full battery voltages.    The MP2759 can operate from a maximum 36V DC input voltage. When an input power supply is present, the MP2759 charges the battery with four phases: trickle charge, pre-charge, constant current (CC) charge, or constant voltage (CV) charge. To guarantee safe operation, the MP2759 has robust protection functions, such as battery over-voltage protection (OVP), battery temperature sensing and protection, thermal shutdown, and a charging safety timer. ELECTRICAL SPECIFICATIONS Parameter Symbol Value Input voltage VIN 10 to 36 Input current IIN Up to 3 Battery charge 3.6 to 4.4 VBATT_REG regulation voltage (Adjustable) Fast charge current ICC Up to 3 Units V A V          Up to 36V Operation Input Voltage Up to 3A Charge Current 1-Cell to 6-Cell Series with 3.6V, 4.0V, 4.1V, 4.15V, 4.2V, 4.35V, or 4.4V Battery Regulation Voltage for Each Cell Input Current Limit Regulation Minimum Input Voltage Regulation Support OR Selection Power Path Management 0.5% Battery Regulation Voltage Accuracy Charge Operation Indicator Input Status Indicator Battery Over-Voltage Protection (OVP) Charging Safety Timer Battery Thermal Monitoring and Protection with JEITA Profile APPLICATIONS     Industrial Medical Equipment Power Tools Robot and Portable Vacuum Cleaners Wireless Speakers 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. A EV2759-Q-01A Rev. 1.0 MonolithicPower.com 12/7/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 1 EV2759-Q-01A – 36V SW CHARGER W/ PPM FOR 1S TO 6S BATTERIES EVAL BOARD EV2759-Q-01A EVALUATION BOARD Efficiency vs. Charge Current 100.0% EFFICIENCY 98.0% 96.0% 94.0% VIN=16V, VIN=16V, VIN=24V, VIN=30V, 92.0% 90.0% VBATT=8.4V VBATT=12.6V VBATT=16.8V VBATT=25.2V 88.0% (LxWxH) 6.35cmx6.35cmx1.3cm Board Number MPS IC Number EV2759-Q-01A MP2759GQ-0000 0 1 2 3 IBATT (A) EV2759-Q-01A Rev. 1.0 MonolithicPower.com 12/7/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 2 EV2759-Q-01A – 36V SW CHARGER W/ PPM FOR 1S TO 6S BATTERIES EVAL BOARD QUICK START GUIDE This board is designed for the MP2759, a highly integrated switching charger for 1-cell to 6-cell Liion/Li-Polymer batteries that are connected in series. This board’s layout accommodates most commonly used capacitors. Table 1 lists the connectors. Table 1: Connectors Connectors Description TP1/VIN Connect to the input source’s positive terminal. TP2/GND Connect to the input source’s negative terminal. TP5/BATT Connect to the battery pack’s positive terminal. TP4/GND Connect to the battery pack’s negative terminal. TP3/SYS Connect to the system load’s positive terminal. TP6/GND Connect to the system load’s negative terminal. TP7/SW Test point for the switching node. TP10/PMID Test point for PMID. DISABLE, VCC, NTC, TP8/ACOK, TP9/STAT Test connection for related signals. TP11, TP12, TP13, TP14 / GND Test point for ground. 1. Connect the system load to the SYS and GND connectors. Ensure that the load’s positive and negative terminals are not reverse-connected. Ensure that the maximum system load current does not exceed the input source capacity. If the system load can exceed the input source’s output current limit, use a Schottky diode with appropriate current capacity to bypass the Q1 body diode. 2. Connect the battery pack to the BATT and GND connectors. Ensure that the battery’s positive and negative terminals are not reverse-connected. 3. If using a battery emulator, preset the battery emulator to the correct voltage. Turn the emulator off, connect the emulator to BATT and GND, then turn the emulator’s output on. 4. Preset the input power source to its correct voltage, then turn the power source off. Connect the power source to VIN and GND, then turn the power source on. The EVB should start charging. 5. Ensure that the NTC jumper has been connected to avoid triggering an NTC fault. 6. To modify the charging parameters, configure the EVB using the jumpers. Table 2 lists the adjustable parameters. Table 2: Adjustable Parameters Adjustable Parameter Value Charge current 1, 2, or 3 Input current limit 1, 1.5, or 2 Cell numbers 1, 2, 3, 4, 5, or 6 Battery regulation voltage (each cell) 3.6, 4.0, 4.15, 4.2, 4.35, or 4.4 Minimum input voltage limit 10, 15, 22, or 28 Units A A N/A V V EV2759-Q-01A Rev. 1.0 MonolithicPower.com 12/7/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 3 EV2759-Q-01A – 36V SW CHARGER W/ PPM FOR 1S TO 6S BATTERIES EVAL BOARD Table 3 lists the jumper connections. Table 3: Jumpers Jumpers JP1, JP2, JP3, JP4, JP5, JP6 JP7, JP8, JP9, JP10, JP11, JP12 JP13 Description Selects the battery regulation voltage for each cell Select the battery cell number NTC divider JP14, JP15, JP16 JP17, JP18 JP19, JP20 Selects the minimum input voltage limit Selects the input current limit Select the constant current charge current Configurations 3.6V, 4.0V, 4.15V, 4.2V, 4.35V, or 4.4V 1 cell, 2 cells, 3 cells, 4 cells, 5 cells, or 6 cells Connect to NTC pin (pull up to VCC) or voltage divider 10V, 15V, 22V, or 28V 1A, 1.5A, or 2A 1A, 2A, or 3A Default 4.2V 3 cells NTC divider 10V 2A 2A This board can work safely under the applications where VIN < 20V. Table 4 lists the recommended components for applications exceeding 20V. Table 4: Component Selections Pin Condition ≤20V input IN >20V input BATT PMID 1-cell, 2-cell, 3-cell, or 4-cell 5-cell or 6-cell - Recommendations Add a 1µF/50V ceramic capacitor to the IN pin for adapter applications. Use a minimum 47µF capacitor for solar applications. Add a 47µF/50V electrolytic capacitor to the IN pin. Also add a TVS diode if the IN voltage exceeds the pin’s maximum voltage rating during the VIN hot-insertion test Add a 10µF/50V ceramic capacitor to the BATT pin. Add a TVS diode or ≥47µF electrolytic capacitor to the BATT pin. Add a 2.2µF/50V ceramic capacitor (1206 size preferred) to the PMID pin. A 2A/40V Schottky diode from IN to PMID. Add a TVS diode if the PMID voltage exceeds the pin’s maximum voltage rating during the VBATT hot-insertion test. EV2759-Q-01A Rev. 1.0 MonolithicPower.com 12/7/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 4 EV2759-Q-01A – 36V SW CHARGER W/ PPM FOR 1S TO 6S BATTERIES EVAL BOARD EVALUATION BOARD SCHEMATIC Figure 1: Evaluation Board Schematic (1) (2) (3) (4) (5) Notes: 1) 2) 3) 4) 5) The EV2759-Q-01A can work safely in applications where VIN < 20V. For applications those exceed 20V, place a ≥47µF electrolytic capacitor between VIN and GND. Also add a Schottky diode with higher current capacity (e.g. B240A) between VIN and PMID. Use a TVS diode to clamp the VIN voltage if its voltage spike reaches 45V. Consider the voltage spike on PMID during battery insertion. Use an extra TVS diode to clamp the PMID voltage if its voltage spike reaches 45V. For additional component selection information, refer to the MP2759 datasheet. The inductor on this evaluation board can only be used in applications where fSW = 700kHz or ICC < 2.5A. For applications where fSW = 450kHz or ICC > 2.5A, select an inductor with higher inductance or higher saturation current. EV2759-Q-01A Rev. 1.0 MonolithicPower.com 12/7/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 5 EV2759-Q-01A – 36V SW CHARGER W/ PPM FOR 1S TO 6S BATTERIES EVAL BOARD EV2759-Q-01A BILL OF MATERIALS Qty Ref 1 C1 1 C2 1 C4 1 C5 1 C7 1 C8 1 C9 1 1 2 2 1 1 1 1 1 1 1 1 1 2 2 2 2 1 1 1 1 L1 RS1 R1, R9 R2, R8 R3, RNTC1, RNTC2 R4 R5 R6 R7 R10 R11 R12 R13 R14 R15, R19 R16, R20 R17, R21 R18, R22 R23 R24 LED1 LED2 1 U1 1 M1 1 M2 3 Value Description Package Manufacturer Manufacturer P/N Ceramic capacitor, 50V, 1206 Murata GRM31MR71H105KA88L 1µF X7R 10µF Electrolytic capacitor, 50V DIP Jianghai CD287-50V10 Ceramic capacitor, 50V, 0603 Murata GRM188R71H104KA93D 100nF X7R Ceramic capacitor, 50V, 1206 Murata 2.2µF GRM31CR71H225KA88L X7R, Ceramic capacitor, 25V, 0603 Murata 1µF GRM188R71E105KA12D X7R Ceramic capacitor, 50V, 1206 Murata 10µF GRM31CR61H106KA12L X5R Electrolytic capacitor, 50V, 100µF DIP Rubycon 50YXF100MEFC 100µF 10µH Inductor, 10µH, 35mΩ, 4A SMD Wurth 744066100 20mΩ Film resistor, 1% 0805 Yageo RL0805FR-070R02L 95.3kΩ Film resistor, 1% 0603 Yageo RC0603FR-0795K3L 80.6kΩ Film resistor, 1% 0603 Yageo RC0603FR-0780K6L 10kΩ Film resistor, 1% 0603 Yageo RC0603FR-0710KL 221kΩ 20kΩ 2kΩ 158kΩ 47.5kΩ 100Ω 10kΩ 110kΩ 243kΩ 34.8kΩ 64.9kΩ 105kΩ 165kΩ 1MΩ 806kΩ Red Green Film resistor, 1% Film resistor, 5% Film resistor, 1% Film resistor, 1% Film resistor, 1% Film resistor, 1% Film resistor, 5% Film resistor, 1% Film resistor, 1% Film resistor, 1% Film resistor, 1% Film resistor, 1% Film resistor, 1% Film resistor, 5% Film resistor, 1% LED red LED green 0603 0603 0603 0603 0603 0603 0603 0603 0603 0603 0603 0603 0603 0603 0603 0805 0805 QFN-19 (3mmx 3mm) Yageo Yageo Yageo Yageo Yageo Yageo Yageo Yageo Yageo Yageo Yageo Yageo Yageo Yageo Yageo Bright LED Bright LED RC0603FR-07221KL CR03T03705NJ20K RC0603FR-072KL RC0603FR-07158KL RC0603FR-0747K5L RC0603FR-07100RL RC0603JR-0710K RC0603FR-07110KL RC0603FR-07243KL RC0603FR-0734K8L RC0603FR-0764K9L RC0603FR-07105KL RC0603FR-07165KL RC0603JR-071ML RC0603FR-07806KL F3D02R-4A F3D02HG-1A MPS MP2759GQ-0000 SOIC-8 Analog Power AM4417P SOT-23 Fairchild 2N7002MTF MP2759 Switching charger AM4417 P-channel MOSFET, 60V, P 23mΩ 2N7002 N-channel MOSFET, 60V MTF EV2759-Q-01A Rev. 1.0 MonolithicPower.com 12/7/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 6 EV2759-Q-01A – 36V SW CHARGER W/ PPM FOR 1S TO 6S BATTERIES EVAL BOARD EV2759-Q-01A BILL OF MATERIALS (continued) Qty Ref 1 D1 1 D2 1 ZD1 Value Description 1N414 Diode, 75V, 0.15A 8W B140 Schottky diode, 40V, 1A Zener diode, 11V, 11V 5mA/500mW Package Manufacturer SOD-123 Diodes Manufacturer P/N 1N4148W SMA SOD-123 B140 Diodes BZT52C11 EV2759-Q-01A Rev. 1.0 MonolithicPower.com 12/7/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 7 EV2759-Q-01A – 36V SW CHARGER W/ PPM FOR 1S TO 6S BATTERIES EVAL BOARD EVB TEST RESULTS Performance curves and waveforms are tested on the evaluation board. L = 10µH/35mΩ, CBATT = 10µF, RSNS = 20mΩ, TA = 25°C, unless otherwise noted. Battery Charge Curve Steady State VIN = 24V, 3-cell, VBATT_REG = 4.2V, ICC = 3A, IIN_LIM = 2A VIN = 24V, 4-cell, VBATT = 7V, ICC = 3A, IIN_LIM = 2A, trickle charge mode CH2: VIN CH2: VIN CH1: VBATT CH4: IBATT CH4: IL CH1: VBATT CH3: VSW CH3: VSW Steady State Steady State VIN = 24V, 4-cell, VBATT = 10V, ICC = 3A, IIN_LIM = 2A, pre-charge mode VIN = 24V, 4-cell, VBATT = 12V, ICC = 3A, IIN_LIM = 2A, constant current charge mode CH2: VIN CH2: VIN CH1: VBATT CH1: VBATT CH4: IL CH4: IL CH3: VSW CH3: VSW Steady State Start-Up VIN = 24V, 4-cell, VBATT = 16.8V, ICC = 3A, IIN_LIM = 2A, constant voltage charge mode VIN = 18V, 2-cell, VBATT = 8V, ICC = 2A, IIN_LIM = 2A, constant current charge mode CH2: VIN CH1: VBATT CH1: VBATT CH2: VIN CH4: IL CH3: VSW CH4: IBATT CH3: VSW EV2759-Q-01A Rev. 1.0 MonolithicPower.com 12/7/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 8 EV2759-Q-01A – 36V SW CHARGER W/ PPM FOR 1S TO 6S BATTERIES EVAL BOARD EVB TEST RESULTS Performance curves and waveforms are tested on the evaluation board. L = 10µH/35mΩ, CBATT = 10µF, RSNS = 20mΩ, TA = 25°C, unless otherwise noted. Shutdown Start-Up VIN = 18V, 2-cell, VBATT = 8V, ICC = 2A, IIN_LIM = 2A, constant current charge mode Power path operation, VIN = 18V, 2-cell, VBATT = 8V, ICC = 2A, IIN_LIM = 1A, ISYS = 0.9A CH2: VIN CH1: VBATT CH2: VIN CH4: IBATT CH1: VSYS CH3: VSW CH3: VSW CH4: IBATT Shutdown IIN_LIM Loop Control Power path operation, VIN = 18V, 2-cell, VBATT = 8V, ICC = 2A, IIN_LIM = 1A, ISYS = 0.9A VIN = 24V, 3-cell, VBATT = 10V, ICC = 3A, IIN_LIM = 1A CH2: VIN CH2: VIN CH1: VBATT CH1: VSYS CH4: IL CH4: IBATT CH3: VSW CH3: VSW CH2: VIN CH1: VBATT VIN_LIM Loop Control VLIM On/Off VIN = 24V/1A, 3-cell, VBATT = 10V, ICC = 3A, IIN_LIM = 2A, VIN_LIM = 15V VIN = 18V, 2-cell, VBATT = 8V, ICC = 2A, IIN_LIM = 2A, DISABLE = 5V/1Hz CH2: VIN CH1: DISABLE CH4: IL CH4: IBATT CH3: VSW CH3: VSW EV2759-Q-01A Rev. 1.0 MonolithicPower.com 12/7/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 9 EV2759-Q-01A – 36V SW CHARGER W/ PPM FOR 1S TO 6S BATTERIES EVAL BOARD PCB LAYOUT Figure 2: Top Layer Figure 3: Middle Layer 1 Figure 4: Middle Layer 2 Figure 5: Bottom Layer EV2759-Q-01A Rev. 1.0 MonolithicPower.com 12/7/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 10 EV2759-Q-01A – 36V SW CHARGER W/ PPM FOR 1S TO 6S BATTERIES EVAL BOARD Revision History Revision # 1.0 Revision Date 12/7/2020 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. EV2759-Q-01A Rev. 1.0 MonolithicPower.com 12/7/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 11