Monolithic Power Systems Inc. EV2637-R-00A

Overview

EV2637-R-00A from Monolithic Power Systems is an evaluation board for the MP2637GR IC, a single-cell Li-ion/Li-Polymer switch-mode battery charger with integrated power path management (PPM) and bidirectional boost capability. It supports 2.5A charge current, 5V/2.2A regulated SYS output in boost mode, and features input over-voltage protection, thermal shutdown, battery temperature monitoring via NTC, and programmable trickle timer - used to validate charging and system-power-backup functionality in portable power-bank designs.

For engineers reviewing the EV2637-R-00A datasheet, EV2637-R-00A pinout, EV2637-R-00A application setup, or EV2637-R-00A equivalent evaluation platforms, this board enables rapid validation of MP2637-based power architecture - including charge-mode priority logic, input-current limiting (2.7A), 4.2V/4.35V selectable full-charge voltage, and reverse-boost operation from BATT to SYS under no-input conditions.

Technical Context

The EV2637-R-00A implements dual-mode operation: charge mode (VIN → BATT + SYS) and boost mode (BATT → SYS), controlled by MODE and EN jumpers. It uses the MP2637GR QFN-24 IC with integrated MOSFETs, supporting programmable input current limit (via RILIM), charge current (via RISET and RS1), and SYS output voltage (via R1/R2 divider on FB).

Power path arbitration is managed through real-time input voltage regulation (REG pin feedback), battery voltage sensing (VB pin), and thermal monitoring (NTC interface). The board includes discrete components for full functional demonstration: 2.2μH power inductor, 22μF input/output capacitors, LED status indicators, and precision resistors for 0.5% charge-voltage accuracy and 2.1A boost-current limit calibration.

Key Specifications

Availability

EV2637-R-00A is available at Aetrix Electronics and suitable for power-bank development, portable medical device prototyping, and IoT edge-node battery backup validation requiring stable component supply and verified reference design implementation.

Supply support for EV2637-R-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 analog and mixed-signal ICs for power management, motor drive, and automotive applications.

The EV2637-R-00A belongs to MPS's evaluation board product line, designed specifically to accelerate adoption of the MP2637 family for single-cell battery-powered systems requiring seamless transition between charging and system-power-backup modes.

FAQ

What is the primary function of the EV2637-R-00A evaluation board?

The EV2637-R-00A is a hardware platform for evaluating the MP2637GR IC - a fully integrated switch-mode battery charger with power path management and reverse boost capability. It demonstrates real-world operation of charge prioritization, input-current limiting, battery-safe charging, and SYS rail generation from battery when input is absent.

How do I configure the board for charge mode versus boost mode?

Charge mode is enabled by connecting EN to H and MODE to L using onboard jumpers; boost mode requires MODE to H and EN to L. These jumper settings directly control the MP2637GR's internal state machine, selecting whether power flows from VIN to BATT/SYS or from BATT to SYS.

What are the default charge and boost parameters set on this board?

The board ships with default settings: 4.2 V full-charge voltage (VB pin floating), 2.5 A charge current (RISET = 47.5 kΩ, RS1 = 20 mΩ), 5 V SYS output (R1 = 31.6 kΩ, R2 = 10 kΩ), and 2.2 A boost current limit (OLIM resistor configured per datasheet equation).

Does the board include battery temperature monitoring capability?

Yes - it integrates an NTC thermistor interface (RT1/RT2 = 10 kΩ, R5 = 10 kΩ) compatible with standard 10 kΩ NTC sensors, enabling battery temperature monitoring per JEITA guidelines. The MP2637GR reads the NTC voltage divider at the NTC pin to suspend charging outside safe thermal zones.

Can the EV2637-R-00A be used with batteries other than Li-ion or Li-Polymer?

No - the MP2637GR and its evaluation board are specifically designed for single-cell Li-ion and Li-Polymer chemistries. The charge algorithm, voltage thresholds (4.2 V / 4.35 V), and safety protections (OVP, trickle timer) are optimized for these chemistries and not configurable for NiMH, LiFePO₄, or lead-acid.

Is the board RoHS-compliant and lead-free?

Yes - all components on the EV2637-R-00A, including the MP2637GR IC, conform to RoHS Directive 2011/65/EU. MPS certifies full lead-free compliance and green status per its Quality Assurance documentation, with no exemptions applied.