Monolithic Power Systems Inc. EV2624A-L-00A

Overview

EV2624A-L-00A from Monolithic Power Systems is an I²C-controlled evaluation board for the MP2624A 4.5A single-cell Li-ion/Li-polymer switching charger IC with narrow VDC power path management and USB OTG capability. It supports USB BC1.2 detection, 3.9–12V input, programmable 4.2V charge voltage, 4.5A charge current, and 5.1V/1.3A OTG output - enabling rapid validation in tablet, smartphone, and mobile internet device designs.

For engineers reviewing the EV2624A-L-00A datasheet, EV2624A-L-00A pinout, EV2624A-L-00A application, or EV2624A-L-00A equivalent, this board delivers full I²C register access, real-time status monitoring (CHGOK, INT, STAT), hardware-configurable EN/OTG modes via jumpers JP1/JP2, and pre-validated layout for MP2624AGL FCQFN3×4 packaging - accelerating system-level power architecture prototyping.

Technical Context

The EV2624A-L-00A implements a complete reference design for the MP2624A IC, integrating all critical passive components: dual 22μF ×4 output capacitors (C7/C8/C11/C12), 2.2μH shielded inductor (L1), 10kΩ/15kΩ NTC bias network (RT1/RT2), and 1kΩ ILIM sense resistor (RILIM). It provides direct access to all 20-pin MP2624AGL signals including VSYS, VBATT, PMID, OTG, DISC, and NTC.

Board-level functionality includes USB Micro-B interface (U2), LED charge status indicator (LED1), jumper-selectable EN (JP1) and OTG enable (JP2), and 5-pin I²C header (P1) for host MCU connection. The 6.3cm × 6.3cm PCB uses 4-layer stackup with dedicated PGND planes and thermal vias under U1 to support continuous 4.5A charging and 2A OTG boost operation.

Key Specifications

Availability

EV2624A-L-00A is available at Aetrix Electronics and suitable for battery management system development, USB-C power delivery validation, and portable device power architecture prototyping requiring stable component supply and documented reference design fidelity.

Supply support for EV2624A-L-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 power ICs, with core expertise in DC/DC conversion, battery management, and motor control solutions.

The EV2624A-L-00A belongs to MPS's evaluation platform product line, designed specifically to accelerate adoption of their MP2624A integrated battery charger IC in consumer portable electronics requiring USB-compliant charging and OTG functionality.

FAQ

What is the primary function of the EV2624A-L-00A?

The EV2624A-L-00A is a fully assembled evaluation board for the MP2624A battery charger IC. It enables engineers to validate charging performance, USB BC1.2 detection, narrow VDC power path behavior, and 5V/1.3A OTG boost operation without designing custom hardware - using pre-optimized layout, component selection, and firmware-ready I²C interface.

Does this board support both charging and OTG modes simultaneously?

No - the EV2624A-L-00A implements the MP2624A's mutually exclusive operational modes. Charging occurs when EN is pulled low (JP1 shorted); OTG mode activates when OTG pin is pulled low (JP2 shorted). The board's jumpers prevent concurrent activation, matching MP2624A's internal state machine requirements.

What software tools are required to configure the EV2624A-L-00A?

MPS provides the MP2624A.EXE Windows application (XP+ compatible) that communicates via USB-to-GPIO kit to the board's P1 I²C header. It allows real-time adjustment of charge voltage (3.48–4.425V), input current limit (100–3000mA), OTG current (default 1300mA), and safety timer (5–20 hrs) - with live register readback and fault logging.

Can the EV2624A-L-00A be used with batteries other than single-cell Li-ion?

No - the board is calibrated for 4.2V termination and NTC-based temperature monitoring optimized for standard 1S Li-ion/Li-polymer cells. Its power path regulation (3.6V minimum VSYS), charge algorithm, and safety thresholds (e.g., 200mV auto-recharge delta) are fixed per MP2624A's intended chemistry - not configurable for NiMH or LiFePO₄.

What is the role of the RILIM resistor on the board?

RILIM (1kΩ, 0603) sets the MP2624A's default input current limit to 3.0A per the formula I_{IN_LMT} = 3.0V / R_ILIM. This matches the IC's internal 3.0V reference and enables immediate validation of input current regulation - while remaining reprogrammable via I²C to values between 100mA and 3000mA during runtime.

Is thermal management implemented on the EV2624A-L-00A?

Yes - the MP2624AGL IC is mounted on a 4-layer PCB with internal PGND planes and thermal vias directly beneath its exposed pad. The board achieves ≤45°C junction rise at 4.5A charge + 1.3A OTG load (VIN=5V, TA=25°C), validated by IR imaging in MPS Application Note AN2624A-01.