Monolithic Power Systems Inc. EV2703-RP-00A

Overview

EV2703-RP-00A from Monolithic Power Systems is an evaluation board for the MP2703 26V, 1A linear lithium-ion battery charger IC with integrated battery diagnostics, JEITA-compliant thermal regulation, and configurable pre-charge/constant-current/constant-voltage charging. It supports input voltage up to 6V (abs max 26V), delivers 4.2V charge regulation, and enables real-time battery voltage sensing via BATTSNS and impedance measurement via controlled dummy load discharge.

For engineers reviewing the EV2703-RP-00A datasheet, EV2703-RP-00A pinout, EV2703-RP-00A application, or EV2703-RP-00A equivalent, this board provides validated test conditions for MP2703 integration-covering ISET current configuration (20mA–1A), NTC-based JEITA profile setup, BATTSNS ADC interfacing, and /CHG & /ACOK status monitoring in single-cell portable power systems.

Technical Context

The EV2703-RP-00A implements the full functional interface of the MP2703 QFN-10 IC, including dedicated ISET resistor selection (JP1–JP3), IPRE scaling (JP4–JP5), RC-filtered BATTSNS output (JP6), fixed 10kΩ NTC pull-down (JP7), and active-low /ACOK and /CHG open-drain outputs (JP8–JP9). All jumpers are shunt-configurable for rapid parameter iteration.

It validates key MP2703 behaviors under real-world conditions: input voltage limiting at 4.5V, trickle/pre-charge transition at 2V, constant-current charge up to 1A, CV regulation at 4.2V ±0.5%, and battery impedance estimation using internal dummy load control via DIAG pin. Test points (TP1–TP8) provide direct access to VIN, VBATT, CHG, ACOK, SNS, DIAG, ISET, and IPRE signals.

Key Specifications

Availability

EV2703-RP-00A is available at Aetrix Electronics and suitable for battery management system development, portable medical device prototyping, and consumer electronics power validation requiring stable component supply, repeatable test conditions, and documented MP2703 behavioral characterization.

Supply support for EV2703-RP-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, with expertise in DC-DC converters, battery chargers, LED drivers, and motor drivers for industrial, automotive, and consumer applications.

The MP2703 product line targets single-cell Li-ion/Li-polymer charging in space-constrained, thermally sensitive applications-delivering integrated diagnostics, JEITA compliance, and analog battery sensing without external microcontroller dependency.

FAQ

What is the purpose of the SNS_RC jumper (JP6) on the EV2703-RP-00A?

JP6 connects an RC filter to the BATTSNS output, conditioning the analog battery voltage signal before it reaches an external ADC. With JP6 installed, the RC network (R4 = 1.13kΩ, C2 = 2.2μF) provides low-pass filtering at ~63Hz to reduce noise and improve measurement stability during battery voltage monitoring.

Can the EV2703-RP-00A be used to validate MP2703 operation above 6V input?

No-the board is rated for 4V–6V operating input; while the MP2703 IC supports up to 26V abs max, the EV2703-RP-00A PCB layout, capacitor voltage ratings (e.g., C2/C3 = 50V X5R), and jumper routing are not designed for sustained >6V operation. Testing beyond 6V risks damage and invalidates performance claims.

How does the board support battery impedance measurement?

The board enables impedance measurement by allowing the host MCU to assert the DIAG pin to activate the MP2703's internal dummy load. Voltage drop across the battery during controlled discharge-measured via BATTSNS-is used with known load current to calculate effective series resistance (ESR), supporting health monitoring and aging analysis.

What do the /CHG and /ACOK signals indicate, and how are they accessed?

/CHG is an active-low open-drain output signaling charge-in-progress (low) or charge-complete/fault (high); /ACOK indicates valid input power (low = OK). Both are routed to test points (TP7, TP1) and header pins (JP9, JP8), with onboard 10kΩ pull-ups enabling direct GPIO connection to an MCU without external components.

Is the EV2703-RP-00A compatible with other MP27xx-series chargers?

No-it is specifically designed for the MP2703 (QFN-10, 2.0mm×2.5mm) and maps its exact pinout, including ISET, BATTSNS, DIAG, and NTC interfaces. Other MP27xx variants (e.g., MP2720, MP2721) have different pin counts, package sizes, and feature sets, making mechanical or electrical interchange impossible without redesign.

Does the board include protection against reverse battery connection?

No-there is no reverse-battery protection circuitry on the EV2703-RP-00A. The schematic shows direct connection of VBATT to the MP2703 BATT pin; incorrect polarity will damage the IC. Users must ensure correct battery simulator or cell orientation before powering the board.