Monolithic Power Systems Inc. EV2665A-QB-00A

Overview

EV2665A-QB-00A from Monolithic Power Systems is an evaluation board for the MP2665A single-cell Li-ion/Li-polymer linear charger IC with integrated power path management, I²C programmability, 1A max charge current, 4.35–5.5V input range, and QFN-12 (2.5mm × 3mm) package-designed to validate battery charging, system power sourcing, and UVLO/SCP protection in portable USB-powered devices.

For engineers reviewing the EV2665A-QB-00A datasheet, EV2665A-QB-00A pinout, EV2665A-QB-00A application, or EV2665A-QB-00A equivalent, this board enables rapid validation of MP2665A's configurable charge parameters (VBATT_REG, ICC, IIN_LIM, BATT_UVLO), thermal/NTC monitoring, FET control, and auto-recharge behavior under real load and battery conditions.

Technical Context

The EV2665A-QB-00A implements full-system power path management: it dynamically selects between VIN, battery, or both to supply SYS load while charging; supports pre-charge, CC/CV charging, charge termination at 2.5–62mA, and auto-recharge at ΔV = 100–200mV below regulation voltage. It integrates I²C-configurable thresholds for input voltage loop (VIN_LOOP), safety timer (1.5–12h), and battery discharge current limit (400–3200mA).

Hardware-level protections include system short-circuit protection (SCP), on-chip battery under-voltage lockout (UVLO, 2.4–3.03V), PCB over-temperature protection (OTP), and NTC-based battery temperature monitoring. The board uses the MP2665AGQB-0000 IC in QFN-12 and includes USB micro-B interface, push-button controls, and test points for VIN, BATT, SYS, INT, SCL, and SDA.

Key Specifications

Availability

EV2665A-QB-00A is available at Aetrix Electronics and suitable for USB-powered portable electronics, wearable health monitors, and IoT edge sensors requiring stable component supply, rapid firmware validation, and production-ready battery management reference design.

Supply support for EV2665A-QB-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 for consumer, computing, industrial, and automotive applications.

The MP2665A product line delivers highly integrated, I²C-programmable battery chargers with power path management for space-constrained, USB-native portable systems requiring robust safety, thermal awareness, and flexible configuration.

FAQ

What is the primary function of the EV2665A-QB-00A evaluation board?

The EV2665A-QB-00A is a hardware platform designed exclusively to demonstrate and validate the MP2665A single-cell Li-ion charger IC. It enables engineers to configure, monitor, and verify all key functions-including I²C-controlled charge parameters, power path arbitration, UVLO/SCP protection, thermal management, and FET control-using the official MP2665A Programming Tool software and EVKT-USBI2C-02 interface kit.

Does the board support real-time battery voltage and current measurement?

Yes-the board provides direct access to VBATT, IBATT, VSYS, and VIN signals via labeled test points and oscilloscope-friendly routing. Charge current (IBATT) and system voltage (VSYS) waveforms are documented in the EVB test results section, and real-time telemetry is reported through the I²C register map (e.g., REG0x0E for battery voltage, REG0x0F for charge current).

Can the EV2665A-QB-00A be used without the USB-to-I²C kit?

No-the board lacks standalone operation capability. It requires the EVKT-USBI2C-02 communication kit and the MP2665A Programming Tool software to configure registers, read status flags, and enable/disable features like FET control, OTP, or NTC monitoring. All functional settings-including charge termination, auto-recharge, and safety timer-are I²C-dependent.

What battery types and configurations are supported?

The board is validated for single-cell Li-ion and Li-polymer batteries with nominal voltages of 3.6 V–3.7 V and full-charge voltages up to 4.545 V. It supports battery simulation via DC source (3 V–4.2 V), includes dedicated BATT+ and BATT− terminals, and enforces configurable UVLO (2.4 V–3.03 V) and discharge current limits (400 mA–3.2 A) to ensure safe operation across chemistries.

Is thermal protection implemented on the evaluation board?

Yes-thermal protection is implemented via two independent mechanisms: (1) PCB over-temperature protection (OTP) using an onboard thermistor circuit controlled by the MP2665A's EN_PCB bit, and (2) junction temperature monitoring enabled by the IC's internal thermal sensor. Both are configurable via I²C register bits and trigger automatic charge suspension when thresholds are exceeded.

How is system power path management demonstrated on this board?

The board demonstrates dynamic power path arbitration by simultaneously powering the SYS load from VIN (e.g., 5 V USB input) while charging the battery-without interrupting system operation during charge state transitions. This is verified using oscilloscope traces showing continuous VSYS during CC/CV phases and seamless switchover to battery-only mode when VIN is removed.