Monolithic Power Systems Inc. EV2690-R-00B

Overview

EV2690-R-00B from Monolithic Power Systems is a reference design board for the MP2690GR QFN26 IC, implementing all-in-one switch-mode battery charge management and bidirectional power path control for single-cell Li-ion/Li-Polymer batteries. It supports 2.5A charging (4.55–6V input) and 2.1A 5V boost output, with integrated fuel-gauge LED drivers, thermal shutdown, battery temperature monitoring, and input/battery over-voltage protection.

For engineers reviewing the EV2690-R-00B datasheet, EV2690-R-00B pinout, EV2690-R-00B application, or EV2690-R-00B equivalent, this evaluation board enables rapid validation of MP2690-based power architectures in portable power banks, sub-battery systems, and USB-powered embedded devices requiring seamless charge/boost mode transition and precise voltage/current regulation.

Technical Context

The EV2690-R-00B implements the MP2690GR's dual-mode operation: in charge mode, it regulates input current up to 2.7A and delivers up to 2.5A charge current with selectable full-charge voltages (4.2V/4.35V/4.45V ±0.5%); in boost mode, it converts battery power (3–4.45V) to regulated 5V SYS output with 2.1A current limit and up to 94.5% efficiency at 4.2V input.

Power path management is controlled via the PB pin and push-button SW1, enabling manual boost activation, shutdown after 2.5s hold, and LEDTC toggle on double-click. Protection includes input OVP, battery OVP/UVP, thermal shutdown, timer-based dead-battery cutoff, and reverse leakage blocking-ensuring safe operation across USB SDP/CDP/DCP source detection profiles.

Key Specifications

Availability

EV2690-R-00B is available at Aetrix Electronics and suitable for power bank development, portable medical device prototyping, and USB-C accessory design requiring stable component supply and validated reference hardware for MP2690 integration.

Supply support for EV2690-R-00B 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 analog and power ICs, with core expertise in DC/DC conversion, battery management, and motor control solutions.

The EV2690-R-00B belongs to MPS's evaluation board product line for battery management ICs, designed specifically to accelerate development of compact, high-efficiency portable power systems using the MP2690's integrated charge + boost architecture.

FAQ

What is the primary function of the EV2690-R-00B?

The EV2690-R-00B is a reference design board for the MP2690GR IC, demonstrating its dual-role capability: charging a single-cell Li-ion battery at up to 2.5A from a 4.55–6V source, and boosting battery power to deliver regulated 5V/2.1A to system loads. It validates full power-path management, including automatic mode switching, protection, and fuel-gauge indication.

How is boost mode activated and controlled?

Boost mode is manually initiated by short-pressing push-button SW1. A long press (>2.5s) disables boost output. Double-clicking SW1 toggles the white LEDTC indicator. The board requires the battery protection IC (U4 FS312F-P) to be enabled first-achieved by briefly charging via USB2 before entering boost mode.

What input sources are supported for charge mode?

The board supports USB Standard Downstream Port (SDP, 500mA), Charging Downstream Port (CDP), and Dedicated Charging Port (DCP) via DP1/DM1 detection. Input current limit defaults to 500mA for SDP, while CDP/DCP limits are set by RILIM (14.7kΩ = 2.7A). External 6V/3A DC supplies may also be used via direct wiring.

Can the charge full voltage be adjusted, and how?

Yes-the charge full voltage is selectable between 4.2V, 4.35V, and 4.45V with ±0.5% accuracy by configuring resistors R1 and R2: floating both yields 4.2V; grounding R2 yields 4.35V; grounding R1 yields 4.45V. This allows optimization for different Li-ion chemistries and safety margins.

Does the board include battery temperature monitoring?

Yes-it integrates battery temperature monitoring via thermistor interface circuitry connected to the MP2690GR's TS pin. The design supports NTC thermistors to enable charge current derating or termination based on battery temperature, complying with JEITA guidelines for safe charging.

What protections are implemented on the EV2690-R-00B?

The board implements input over-voltage protection (OVP), battery over-voltage and under-voltage protection (OVP/UVP), thermal shutdown, battery temperature monitoring, and a 120-minute safety timer to prevent prolonged charging of deeply discharged cells. Reverse battery leakage is blocked via integrated MOSFET control.