Monolithic Power Systems Inc. EV2791-0000-FP-00A

Overview

EV2791-0000-FP-00A from Monolithic Power Systems is an evaluation board for the MP2791 battery monitor and protection IC, designed to validate 7–14-cell Li-ion/Li-polymer pack management in high-voltage industrial and EV traction applications. It integrates dual ADCs for synchronous cell voltage (±1mV accuracy), current sensing (via external shunt), die/NTC temperature monitoring, configurable over-voltage/under-voltage, over-current, short-circuit, and thermal protections, plus internal/external cell balancing.

For engineers reviewing the EV2791-0000-FP-00A datasheet, EV2791-0000-FP-00A pinout, EV2791-0000-FP-00A application, or EV2791-0000-FP-00A equivalent, this board enables rapid validation of I²C-configurable BMS logic, hardware protection timing, Coulomb counting accuracy, and safe-mode bypass functionality under real-world pack voltage (up to 65.8V) and current (±60A) conditions.

Technical Context

The EV2791-0000-FP-00A implements the MP2791DFP-0000 IC in a TQFP-48 package, supporting 7–14 series cells with absolute pin voltages up to 75V. Its analog front-end includes two independent ADCs: one for 14-channel differential cell voltage, die temperature, and four NTC inputs; another for high-precision current measurement via external sense resistor.

Hardware protection logic is fully configurable via I²C registers and includes over-current (OC), short-circuit (SC), cell over-voltage (OVP), under-voltage (UVP), and temperature thresholds with programmable hysteresis, deglitch timers, and auto/manual recovery modes. The board also features external balancing FETs and supports GPIO-controlled P-channel bypass MOSFET operation for low-power safe-mode load provisioning.

Key Specifications

Availability

EV2791-0000-FP-00A is available at Aetrix Electronics and suitable for battery pack validation, BMS firmware development, and safety-critical automotive subsystem qualification requiring stable component supply and full traceability.

Supply support for EV2791-0000-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 expertise in DC/DC converters, battery management, motor drivers, and LED drivers for industrial, automotive, and computing markets.

The MP2791 product line delivers highly integrated, high-accuracy battery monitoring and protection for multi-cell Li-based systems-designed specifically for demanding applications like e-bikes, energy storage systems, and light electric vehicles where precision, reliability, and configurability are essential.

FAQ

What is the maximum number of series cells supported by the EV2791-0000-FP-00A?

The board supports up to 14-series Li-ion or Li-polymer cells, with configurable cell count (7–14) via GUI or register setting. Hardware connections allow physical termination at any channel from C1 to C14 using zero-ohm jumpers, and unused channels must be shorted to the highest active cell to maintain proper voltage reference integrity.

Does the EV2791-0000-FP-00A include both hardware and software tools for configuration?

Yes-it ships with the MP2791 GUI software (Windows executable) that provides full register-level access to all device functions: protection thresholds, ADC scan settings, FET control modes, Coulomb counter parameters, open-wire detection, and watchdog timing. Configuration changes are written directly to the MP2791's internal registers via I²C.

Can the EV2791-0000-FP-00A operate without a battery pack during initial setup?

Yes-using a DC power supply and cell simulator shunt, users can power the board and verify communication, basic ADC readings, and register access without a live battery. However, open-wire detection and cell balancing functions require actual battery connections and cannot be validated in shunt mode.

How is current measurement implemented on this evaluation board?

Current is measured using a precision external sense resistor and the MP2791's dedicated current-sensing ADC. The board supports configurable gain correction (87.5–112.5%) to compensate for resistor tolerance and layout parasitics, enabling accurate Coulomb counting and over-current detection across the full ±60A range.

What protection features are hardware-based versus software-configurable?

All core protections-over-voltage, under-voltage, over-current, short-circuit, and temperature-are implemented in hardware with user-configurable thresholds and timing via I²C. The hardware protection logic operates independently of firmware, ensuring fail-safe response even if host MCU is unresponsive or powered down.

Is the board compatible with standard USB-to-I²C adapters?

Yes-the board interfaces exclusively via I²C through JC1 connector (SCL, SDA, GND). MPS specifies the EVKT-USBI2C-02 adapter, but any USB-to-I²C interface compliant with standard I²C timing and 3.3V logic levels will function correctly when configured with the default slave address (01h) and proper pull-up resistors.