Monolithic Power Systems Inc. EV2787-0000-FP-00A

Overview

EV2787-0000-FP-00A from Monolithic Power Systems is a fully assembled evaluation board for the MP2787DFP-0000 analog front-end IC, designed to validate 7–16-cell lithium-ion battery pack monitoring in high-accuracy energy storage systems. It integrates the MP2787 with a precision current-sense resistor, supports up to 70A continuous charge/discharge current, delivers ±1.5mV cell voltage measurement accuracy, and enables Coulomb counting, internal 58mA passive balancing, and four NTC thermistor inputs.

For engineers reviewing the EV2787-0000-FP-00A datasheet, EV2787-0000-FP-00A pinout, EV2787-0000-FP-00A application, or EV2787-0000-FP-00A equivalent, this board provides I²C-based configuration and real-time monitoring of cell voltages, current, die/NTC temperatures, open-wire faults, and hardware alarms including over-voltage, under-voltage, over-current, and thermal interrupts - all via the MPS MP2787 Programming Tool GUI on Windows.

Technical Context

The EV2787-0000-FP-00A implements the MP2787DFP-0000 IC in TQFP-48 packaging, configured for I²C communication (slave address 0x01, CRC disabled) and direct connection to 18–75.2V battery packs. It routes all 48 pins of the MP2787 to test points and connectors, including dedicated CELL[0–15], SRP/SRN, VTOP, NTC1–NTC4, GPIO1–GPIO3, and NDHSNA interfaces.

Hardware-level monitoring is implemented through configurable thresholds for OC (5.5–176mV discharge / 2.5–80mV charge), UV/OV (0–4980mV per cell), temperature (die and NTC), and cell mismatch (0–1211mV), with interrupt outputs routed to status LEDs and test points for validation without host MCU involvement.

Key Specifications

Availability

EV2787-0000-FP-00A is available at Aetrix Electronics and suitable for battery management system (BMS) development, energy storage system (ESS) prototyping, and electric vehicle (EV) auxiliary pack validation requiring stable component supply, traceable sourcing, and long-term evaluation platform continuity.

Supply support for EV2787-0000-FP-00A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management ICs, with design centers across Asia and North America and global distribution through authorized partners.

The MP2787 product line targets high-accuracy, multi-cell battery monitoring for mission-critical applications including grid-scale ESS, UPS, and EV traction auxiliary systems - emphasizing measurement integrity, fault resilience, and configurability without external microcontroller dependency.

FAQ

What software is required to operate the EV2787-0000-FP-00A?

The MP2787 Programming Tool (Windows 7+) is mandatory. It provides full register access, real-time ADC monitoring, alarm threshold configuration, Coulomb counter control, and cell-balancing setup. The GUI auto-detects the board via USB-to-I²C interface (EVKT-USBI2C-02) and displays live voltage, current, temperature, and status flags.

Can the board evaluate open-wire detection and cell balancing without a real battery pack?

No. Open-wire detection and active cell balancing require actual voltage gradients across series-connected cells. The on-board cell simulator shunt (SW1/SW2) only supports basic voltage/current/temperature readouts. For those features, a physical 7–16S battery pack must be connected to CELLS1 terminals with proper polarity and grounding.

What is the role of the NDHSNA pin on this evaluation board?

NDHSNA is the MP2787's shutdown enable input. Pulling it low forces the IC into shutdown mode (reducing quiescent current); pulling it high enables normal operation. On the EV2787-0000-FP-00A, NDHSNA is accessible via CN6 jumper and test point, allowing manual or MCU-driven power-state control during system integration testing.

Does the board support SPI communication?

No - the EV2787-0000-FP-00A specifically uses the MP2787DFP-0000 variant, which is factory-configured for I²C only. The SPI-compatible version is the separate part number EV2787-0002-FP-00A (MP2787DFP-0002), requiring EVKT-USBSPI-00 interface and different GUI configuration.

How is Coulomb counting calibrated on this board?

Coulomb counting uses the onboard 2mΩ current-sense resistor. Calibration is performed in the GUI under "ADC Scan Configuration" using the "Current Gain Correct (%)" field (range: 87.5%–112.476%), compensating for resistor tolerance and PCB layout parasitics. This correction applies to both accumulated charge and real-time current readings, but not to over-current detection thresholds.

Are external balancing transistors supported?

Yes. The board includes unpopulated footprints (Q1–Q4) and associated gate-drive resistors (R50–R53) to add external N-channel MOSFETs for balancing currents beyond the internal 58mA limit. These are intended for high-current ESS applications where faster equalization is required.