Monolithic Power Systems Inc. EV2624-L-01A

Overview

EV2624-L-01A from Monolithic Power Systems is an I²C-controlled evaluation board for the MP2624GL single-cell Li-ion/Li-polymer switching charger IC. It implements narrow V_DC power path management, USB BC1.2 detection, and 5V/2A USB On-The-Go (OTG) boost functionality. Designed for rapid validation of battery charging, system power-on-without-battery, and supplemental discharge modes in portable devices.

For engineers reviewing the EV2624-L-01A datasheet, EV2624-L-01A pinout, EV2624-L-01A application, or EV2624-L-01A equivalent, this board enables real-time I²C register configuration, input current/voltage regulation tuning, charge termination control, OTG output setting, thermal monitoring verification, and fault status reporting - all with factory-preset 4.2V full-charge voltage and preconfigured USB-to-GPIO communication interface.

Technical Context

The EV2624-L-01A is a functional hardware platform built around the MP2624GL IC in FCQFN 3×4 mm package. It integrates all critical passive components-including 2.2 µH power inductor, 22 µF ×4 bulk capacitors, 1 µF–10 µF ceramic decoupling network, NTC thermistor interface, and dual jumper-selectable EN/OTG enable logic-optimized for stable 4.5A charging and 2A OTG operation under 3.9–7.0 V input.

Board-level features include I²C-configurable parameters (ICHG up to 4.5 A, VIN_REG from 3.88–5.08 V, IIN_LMT 100–3000 mA), programmable safety timer (5–20 hrs), auto-recharge threshold (100/200 mV below full voltage), and real-time status reporting via STAT/INT pins. The layout supports both standalone charger mode and system-integrated NVDC power path validation.

Key Specifications

Availability

EV2624-L-01A is available at Aetrix Electronics and suitable for tablet PC development, smartphone reference design validation, and mobile internet device (MID) power architecture prototyping requiring stable component supply, traceable evaluation hardware, and documented I²C register behavior.

Supply support for EV2624-L-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 power management ICs, with over two decades of expertise in DC/DC converters, battery chargers, LED drivers, and motor drivers.

The EV2624-L-01A belongs to MPS's MP26xx evaluation platform family, designed specifically to accelerate adoption of their highly integrated, I²C-programmable battery management solutions for consumer portable electronics with stringent space and efficiency constraints.

FAQ

What software is required to configure the EV2624-L-01A?

The official MP2624.EXE Windows application (compatible with Windows XP and later) is required. It provides GUI-based access to all I²C registers including input current limit, charge voltage, OTG settings, timer configuration, and real-time status monitoring. No third-party drivers or SDKs are needed beyond the included USB-to-GPIO communication kit.

Does the board support USB Battery Charging Specification 1.2 detection?

Yes - the underlying MP2624GL IC natively implements BC1.2 D+/D− detection logic. The EV2624-L-01A exposes the DP/DM pins on U2 and routes them to the MP2624GL, enabling automatic identification of SDP, CDP, and DCP sources and corresponding I²C-reportable status flags without external circuitry.

Can the board operate without a battery installed?

Yes - narrow V_DC power path management ensures VSYS remains regulated above 3.6 V using only input power. The board powers the system load directly while simultaneously charging a connected battery, and continues operation even when the battery is fully depleted or physically removed.

What is the purpose of JP1 and JP2 jumpers?

JP1 controls the /EN pin: factory-set to pull low for charger enable; open or pulled high disables charging. JP2 configures the OTG pin: factory-set to pull high to disable OTG; pulling low enables 5 V boost mode. Both allow hardware-level mode selection independent of I²C commands.

Is thermal regulation implemented on this board?

Yes - the MP2624GL monitors die temperature via internal sensor and reduces charge current when exceeding the I²C-programmable thermal regulation threshold. The board routes the VNTC pin to an external NTC thermistor (R_T1/R_T2) for battery temperature monitoring during charge, with fault reporting via INT pin.

What is the maximum system load current supported in supplement mode?

In battery supplemental mode, the board supports up to 9 A total system current (I_SYS) by combining input power and battery discharge through the integrated 10 mΩ discharge MOSFET. This allows sustained high-power operation (e.g., CPU burst + display backlight) even when input current is limited to 1.8 A.

How is shipping mode activated on the EV2624-L-01A?

Shipping mode is enabled via I²C command (DISC bit = 1), which disconnects the battery from all internal circuitry to reduce self-discharge to <1 µA. The board includes a dedicated DISC pin routed to header P1, allowing external MCU control or manual activation using jumper JP1 in conjunction with firmware.