Monolithic Power Systems Inc. EV2787-0002-FP-00A

Overview

EV2787-0002-FP-00A from Monolithic Power Systems is a production-ready evaluation board for the MP2787DFP-0002 SPI-configured battery monitor IC, designed to validate 7–16-cell Li-ion/LiPo battery pack monitoring in high-accuracy BMS applications. It integrates the TQFP-48 MP2787 AFE with a 0.5mΩ current-sense resistor, supports up to 70A continuous charge/discharge current, and enables Coulomb counting, cell voltage measurement (0–5V), die/NTC temperature sensing, and internal 58mA passive balancing.

For engineers reviewing the EV2787-0002-FP-00A datasheet, EV2787-0002-FP-00A pinout, EV2787-0002-FP-00A application, or EV2787-0002-FP-00A equivalent, this board provides full hardware alarm configuration (OV/UV/OC/temperature/unbalance), GUI-driven register tuning via USB-to-SPI interface (EVKT-USBSPI-00), and real-world validation of balancing control logic, open-wire detection, and ADC scan timing under thermal and load transients.

Technical Context

The EV2787-0002-FP-00A implements the MP2787DFP-0002 variant, which uses SPI (not I²C) for host communication with CRC disabled by default. Its hardware architecture includes dedicated analog front-end channels for 16-cell voltage acquisition, four NTC thermistor inputs with programmable pull-down, and dual-stage balancing support-internal MOSFETs (58mA max) plus footprints for external transistors.

It operates across 18V–75.2V input range (7–16 cells × 2.5–4.7V/cell), features configurable ADC scan rates (254ms/492ms/968ms), and supports dynamic GPIO reconfiguration (GPIO1–3 as digital I/O or buffered ADC inputs) and watchdog bark/bite timeouts (25–3200ms). All alarm thresholds-including cell OV/UV (0–4980mV), mismatch (0–1211mV), and OC limits (5.5–528mV)-are software-tunable via register writes.

Key Specifications

Availability

EV2787-0002-FP-00A is available at Aetrix Electronics and suitable for battery management system development, electric vehicle auxiliary power validation, and energy storage system (ESS) stack qualification requiring stable component supply, repeatable test platform consistency, and traceable firmware calibration data.

Supply support for EV2787-0002-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 in the US, China, and Taiwan, and global distribution through authorized partners.

The MP2787 product line delivers high-accuracy, multi-cell battery monitoring for mission-critical applications including e-bikes, UPS systems, and grid-scale ESS, integrating precision voltage/current/temperature measurement with configurable safety alarms and balancing control.

FAQ

What communication protocol does EV2787-0002-FP-00A use?

The EV2787-0002-FP-00A implements the MP2787DFP-0002 IC variant, which uses SPI (Serial Peripheral Interface) with a default slave address of 01h and CRC disabled. It requires the EVKT-USBSPI-00 USB-to-SPI adapter for PC connectivity and is incompatible with I²C interfaces like the EVKT-USBI2C-02 used for the EV2787-0000-FP-00A variant.

Can this board evaluate open-wire detection and cell balancing with simulated batteries?

No. Open-wire detection and active cell balancing functions require a real multi-cell battery pack with physical voltage gradients across terminals. The on-board cell simulator shunt (SW1/SW2) only supports rapid functional verification of voltage/current/temperature readings and alarm triggering-not wire-integrity checks or balancing current flow.

What is the maximum balancing current achievable with this board?

The board delivers 58mA internal balancing current using integrated MOSFETs. For higher currents, it provides unpopulated footprints (R54–R59, Q1–Q4 locations) to add external N-channel MOSFETs and balancing resistors, enabling scalable balancing beyond 58mA-designers must select FETs rated for ≥75V VDS and appropriate gate drive compatibility with MP2787's 5.5V gate output.

How do I configure the number of series cells for testing?

Use the MP2787 Programming Tool GUI: under "Cell and Communication Configuration," set "Number of Series Cells" to 7–16. For packs with fewer than 16 cells, install 0Ω resistors on unused cell channel jumpers (e.g., R54–R59 for a 10-cell pack) and float higher-position connectors (CELLS1 pins 11–16) to prevent floating inputs and ensure accurate ADC reference integrity.

Does the board support both charge and discharge over-current protection?

Yes. The MP2787DFP-0002 on this board independently configures separate OC thresholds: OC DSCHG Limit (5.5–528mV, 1x/3x gain) for discharge events and OC CHG Limit (2.5–240mV, 1x/3x gain) for charge events. Each has independent deglitch timing (0.1–25.5ms) and interrupt masking, allowing asymmetric protection profiles aligned with battery chemistry limits.

What software and drivers are required to operate the board?

The MP2787 Programming Tool (Windows 7+) is mandatory and freely downloadable from the MPS website. It requires the EVKT-USBSPI-00 driver package installed first. No additional SDK or firmware flashing is needed-the GUI communicates directly with the MP2787 registers via SPI, reads real-time ADC values, and saves configuration snapshots to local files for version-controlled BMS validation.