Monolithic Power Systems Inc. EV2632-R-01A

Overview

EV2632-R-01A from Monolithic Power Systems is an evaluation board for the MP2632GR IC, enabling rapid validation of all-in-one 3A switch-mode battery charging and 3A boost discharge functionality for single-cell Li-ion/Li-Polymer systems. It supports dual-mode operation (charge mode with 4.65–6V input and up to 3A charge current; boost mode delivering regulated 5V/3A SYS output from battery), includes 4-LED fuel gauge, thermal shutdown, input/battery overvoltage protection, and NTC-based temperature monitoring - used in power-bank and sub-battery reference designs.

For engineers reviewing the EV2632-R-01A datasheet, EV2632-R-01A pinout, EV2632-R-01A application, or EV2632-R-01A equivalent, this board provides hands-on verification of MP2632GR's integrated power-path management, programmable charge voltage (4.2/4.35/4.45V), input-current-limit configuration via RILIM, boost-enable timing behavior, and USB-compliant load-detection logic using PB pin and RC network.

Technical Context

The EV2632-R-01A implements MP2632GR's dual-power-path architecture: in charge mode, it regulates VIN-to-BATT conversion with programmable ICHG (up to 3A) and selectable VBATT_Full (4.2/4.35/4.45V); in boost mode, it enables reverse-direction BATT-to-SYS conversion with VSYS = 5V ±1% and ISYS limit up to 3A. Mode switching is controlled by PB pin state and input presence detection via DCP/SDP jumpers.

Board-level features include real-time battery voltage indication via four discrete LEDs, NTC thermistor interface (RT1/RT2, VNTC pins), programmable safety timer, and reverse-leakage blocking using M3 MOSFET. Protection functions are hardware-enforced: input OVP at ~6.5V, battery OVP at 4.5V, and thermal shutdown at 125°C.

Key Specifications

Availability

EV2632-R-01A is available at Aetrix Electronics and suitable for power-bank validation, portable device sub-battery integration, and USB-compliant boost-charger reference design requiring stable component supply, repeatable test conditions, and traceable evaluation hardware.

Supply support for EV2632-R-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 expertise in DC/DC converters, battery management, and motor drivers.

The EV2632-R-01A belongs to MPS's evaluation board product line, designed specifically to accelerate adoption of the MP2632GR - an all-in-one battery charge and boost controller targeting space-constrained, cost-sensitive portable applications.

FAQ

What is the primary function of the EV2632-R-01A evaluation board?

The EV2632-R-01A is a dedicated hardware platform for evaluating the MP2632GR IC, demonstrating its dual-role capability: charging a single-cell Li-ion battery from a 4.65–6V source at up to 3A, and boosting battery power to deliver a regulated 5V/3A output to system loads when input is absent. It includes full safety circuitry and visual status feedback.

How does the board detect and auto-enable boost mode?

Boost mode activates automatically when a load is connected to the SYS USB port (U3). The RC network (R11/C14) on the USB shield detects grounding caused by plug-in, generating a falling edge pulse on the PB pin. This triggers internal boost startup, while M3 isolates PB from load variations after enablement to ensure stable operation.

Can the charge voltage be adjusted, and how is it configured?

Yes, the full-charge voltage is selectable between 4.2V, 4.35V, and 4.45V with 0.5% accuracy. Configuration is done by connecting the VB pin to floating (4.2V), L (ground, 4.35V), or H (VIN, 4.45V) using JP2 jumpers - matching common Li-ion chemistry requirements without firmware changes.

What components define the 3A charge and boost current limits?

Charge current (ICHG) is set by RISET (49.9kΩ) and RS1 (20 mΩ); boost output current (ISYS) is set by ROLIM (49.9kΩ) and RS1. Input current limit (IIN_LIM) is configured separately via RILIM (14.7kΩ for 2.7A). All resistors are 0603 surface-mount with 1% tolerance for precision calibration.

Does the board support battery temperature monitoring, and how is it implemented?

Yes, it supports NTC-based battery temperature monitoring using RT1 and RT2 (10kΩ, 5%) resistors and the VNTC pin. The MP2632GR reads the voltage divider formed by the NTC and RT1/RT2 to derive temperature, enabling charge suspension or thermal derating per JEITA guidelines - verified in schematic and BOM.

Is the EV2632-R-01A compatible with standard USB power sources and loads?

Yes - it accepts 5V USB power inputs (within 4.65–6V range) and delivers USB-compliant 5V/3A SYS output. Its DCP/SDP1/SDP2 jumper configuration supports USB BC1.2 detection modes, and the PB-triggered boost activation mimics standard USB charger behavior when devices are plugged in.