Monolithic Power Systems Inc. EV2695-Q-01A

Overview

EV2695-Q-01A from Monolithic Power Systems is an evaluation board for the MP2695GQ-0000, a fully integrated I²C-controlled single-cell Li-ion switching charger IC. It supports 4–11 V input, programmable charge current up to 3.6 A, and adjustable charge voltage from 3.6 V to 4.45 V, enabling precise JEITA-compliant charging in portable power-bank and sub-battery systems.

For engineers reviewing the EV2695-Q-01A datasheet, EV2695-Q-01A pinout, EV2695-Q-01A application, or EV2695-Q-01A equivalent, this board provides full access to MP2695's I²C registers, real-time battery current monitoring via analog IB output, fault reporting through INT pin, and configurable thermal/safety timers - all validated on a 6.35 cm × 6.35 cm QFN-based layout.

Technical Context

The EV2695-Q-01A implements the MP2695's three-phase charging algorithm (pre-charge, constant-current, constant-voltage) with dual-loop regulation: input current limit (100 mA–3 A) and minimum input voltage control for adapter power tracking. It exposes all configuration and status registers-including JEITA profile thresholds, safety timer values, and NTC thermistor scaling-via standard I²C interface at 100 kHz/400 kHz.

Board-level features include micro-USB power input (P1), dedicated test points for VIN/BATT/GND/INT/NTC/SCL/SDA, jumper-selectable I²C pull-ups (JP2), and onboard current-sense resistor (RS1 = 10 mΩ) for analog battery current monitoring at the IB pin of U1 (MP2695GQ-0000).

Key Specifications

Availability

EV2695-Q-01A is available at Aetrix Electronics and suitable for power-bank development, sub-battery system validation, and portable device battery management prototyping requiring stable component supply and rapid firmware integration.

Supply support for EV2695-Q-01A 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 design centers across Asia and North America.

The MP2695 product line delivers highly integrated, I²C-programmable switching chargers optimized for space-constrained, thermally sensitive single-cell Li-ion applications including wearables, Bluetooth speakers, and compact power banks.

FAQ

What is the primary function of the EV2695-Q-01A board?

The EV2695-Q-01A is a fully assembled and tested evaluation platform for the MP2695GQ-0000 switching battery charger IC. It enables hardware and firmware engineers to validate charging performance, configure JEITA profiles, monitor battery current via analog output, and debug I²C communication without designing custom PCBs.

Does the board support external NTC thermistor connections?

Yes - the board includes a dedicated NTC connector (labeled "NTC") that interfaces directly with the MP2695's NTC input pin. A default voltage divider (R3/R4 = 10 kΩ each) is installed; JP1 selects onboard NTC biasing, allowing accurate temperature-based charge rate adjustment per JEITA standards.

How is battery current measured on this evaluation board?

Battery current is measured using the onboard 10 mΩ sense resistor (RS1). The MP2695's IB pin outputs an analog voltage (0.5 V/A scale) proportional to charge current, accessible at TP15. This signal can be read by an external ADC or oscilloscope for real-time current profiling.

Can the EV2695-Q-01A operate without the USB dongle?

Yes - while the USB dongle enables GUI-based I²C control, the board supports standalone operation. After initial configuration via I²C, the MP2695 retains settings in nonvolatile registers. Input power (via P1/micro-USB or TP3/TP4) and battery connection (TP1/TP2) initiate autonomous charging with preloaded parameters.

What safety protections are implemented on the board?

The board inherits all MP2695-integrated protections: input overvoltage lockout (16 V absolute max), thermal shutdown (150 °C junction), charge safety timer (programmable up to 24 hours), and JEITA-compliant temperature-dependent charge current/voltage limiting - all enforced in hardware without host intervention.

Is the MP2695GQ-0000 IC soldered to the board?

Yes - the MP2695GQ-0000 is mounted in a 3 mm × 3 mm QFN-24 package (U1) with exposed thermal pad, reflow-soldered and verified per JEDEC J-STD-020. All supporting components - including input/output capacitors, power inductor (L1 = 1 µH/10 A), and current-sense resistor - match the MP2695's recommended layout and BOM.