Monolithic Power Systems Inc. EV2615B-Q-00A

Overview

EV2615B-Q-00A from Monolithic Power Systems is an evaluation board for the MP2615B monolithic switching lithium-ion battery charger IC, supporting single-cell Li-ion/Li-polymer batteries with 4.5–18V input, 2A configurable charge current, and dual VBATT options (4.03V or 3.93V) selected via SEL pin logic-used to validate CC/CV charging performance in portable power management designs.

For engineers reviewing the EV2615B-Q-00A datasheet, EV2615B-Q-00A pinout, EV2615B-Q-00A application, or EV2615B-Q-00A equivalent, this board enables rapid validation of MP2615B's COT control, thermal shutdown, cycle-by-cycle OCP, battery temperature monitoring, and reverse-blocking protection in real-world 1-cell charging systems.

Technical Context

The EV2615B-Q-00A implements the MP2615B IC in a QFN-16 (3mm×3mm) package with integrated high- and low-side MOSFETs, enabling up to 99% duty cycle operation when VBATT approaches VIN. It uses constant-off-time (COT) control for fast transient response and internal loop compensation to eliminate external compensation components.

Two independent control loops regulate ICHG (via RS1 sense resistor) and VBATT (selectable 4.03V/3.93V via SEL pin), while ACOK and CHGOK open-drain outputs provide real-time status indication for input presence and charging state-critical for system-level power sequencing and UI feedback in space-constrained devices.

Key Specifications

Availability

EV2615B-Q-00A is available at Aetrix Electronics and suitable for smartphone power validation, portable media player battery subsystem design, and handheld medical device charging development requiring stable component supply and rapid prototyping capability.

Supply support for EV2615B-Q-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 core expertise in DC-DC conversion, battery charging, and motor control solutions.

The MP2615B product line targets compact, high-efficiency single-cell Li-ion charging applications-designed to replace discrete charger solutions with integrated MOSFETs, protection, and precision regulation in portable electronics.

FAQ

What is the purpose of JP2 on the EV2615B-Q-00A board?

JP2 configures the SEL pin logic level to select the terminal battery voltage: pulling SEL high sets VBATT to 3.93V, while floating or pulling low sets it to 4.03V. This allows direct hardware-based adaptation to different Li-ion cell voltage profiles without firmware changes or resistor rework.

How is charge current configured on this evaluation board?

Charge current is set by the sense resistor RS1 (0.05Ω, 1%, 1/4W). Using ICC = 100mV / RS1, a 50mΩ value yields 2A. The board supports recalibration by replacing RS1-enabling precise current tuning from ~0.5A to 2A without modifying control logic or layout.

Does the EV2615B-Q-00A support preconditioning for deeply depleted batteries?

Yes-the underlying MP2615B IC includes built-in preconditioning mode that delivers a low-current trickle charge (10% of ICC) before entering constant-current mode. This prevents damage to cells with voltage below ~2.5V and is fully enabled on the EV2615B-Q-00A without additional configuration.

What thermal protection features are implemented?

The board inherits MP2615B's internal thermal shutdown with hysteresis, activating at ~150°C junction temperature. The QFN-16 package's exposed thermal pad is soldered to the PCB ground plane, and the board layout includes thermal relief traces and copper pours to sustain continuous 2A operation under ambient temperatures up to 60°C.

Can ACOK and CHGOK outputs drive LEDs directly?

Yes-both are open-drain outputs rated for 20mA sink current. The board includes green (LED1) and red (LED2) LEDs with current-limiting resistors tied to CHGOK and ACOK respectively, providing immediate visual status feedback without external driver circuitry.

Is reverse-blocking protection implemented on this board?

Yes-the MP2615B integrates internal reverse-blocking MOSFET control, eliminating the need for an external blocking diode. This reduces BOM count, forward voltage drop, and thermal losses during charging, and is fully functional on the EV2615B-Q-00A with no user intervention required.