Monolithic Power Systems Inc. EV2608DQ-00A

Overview

EV2608DQ-00A from Monolithic Power Systems is a fully assembled and tested evaluation board for the MP2608DQ dual-input linear Li-ion battery charger IC, supporting USB (4.5–5.8 V, 450 mA fixed) and AC adapter (up to 28 V surge tolerant, 100–1000 mA programmable) inputs, with CC/CV charging, thermal protection, and LED-based charge/fault status indication for single-cell 4.2 V battery systems.

For engineers reviewing the EV2608DQ-00A datasheet, EV2608DQ-00A pinout, EV2608DQ-00A application, or EV2608DQ-00A equivalent, this board enables rapid validation of MP2608DQ's dual-input charging behavior, programmable current configuration via JP1–JP3 jumpers, battery full threshold tuning via R5, and fault diagnostics using LED2 under overtemperature, timer timeout, or input fault conditions.

Technical Context

The EV2608DQ-00A implements the MP2608DQ's native dual-input architecture: USB input is hardwired to deliver 450 mA constant current, while adapter input supports 100–1000 mA via resistor-programmed ICHG using JP1–JP3 jumper combinations. The board routes all critical signals-including VBAT sense, CHG_OK, FAULT, and thermal feedback-to accessible test points and LEDs.

It integrates 0.75% accurate 4.2 V CV regulation, proprietary over-voltage protection up to 28 V, internal soft-start, and auto-recharge functionality. All passive components (C1–C4, R1–R6, LED1/LED2) are pre-mounted in industry-standard packages (1210, 1206, 0805, QFN10), and the PCB layout follows MPS reference design guidelines for thermal management and noise immunity.

Key Specifications

Availability

EV2608DQ-00A is available at Aetrix Electronics and suitable for battery-powered portable electronics development, USB/adapter dual-input power system validation, and Li-ion charging algorithm testing requiring stable component supply and traceable reference hardware.

Supply support for EV2608DQ-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, motion control, and interface applications.

The MP2608 product line delivers highly integrated linear Li-ion chargers optimized for space-constrained portable devices requiring robust dual-input operation, precise voltage regulation, and reliable thermal and overvoltage protection.

FAQ

What input sources does the EV2608DQ-00A support?

The board accepts two independent inputs: a 4.5–5.8 V USB source delivering fixed 450 mA charge current, and an AC adapter input rated for up to 28 V surge tolerance, with programmable charge current (100–1000 mA) set via JP1–JP3 jumpers. Both inputs share the same battery output path but are internally isolated and managed by the MP2608DQ's dual-input control logic.

How is charge current configured on the EV2608DQ-00A?

Adapter-side charge current is selected using three 2-pin jumpers (JP1, JP2, JP3): six discrete settings (1000 mA, 800 mA, 700 mA, 500 mA, 200 mA) are enabled by shorting specific jumper pairs as defined in the Quick Start Guide. USB-side current remains fixed at 450 mA regardless of jumper state, and no external resistor is required for USB operation.

What does LED2 indicate on the EV2608DQ-00A?

LED2 illuminates exclusively during fault conditions: timer timeout (charge duration exceeded), overtemperature shutdown, or input overvoltage/undervoltage detection. It remains off during normal charging, standby, or battery-full states. This provides immediate visual diagnostics without requiring oscilloscope or multimeter probing.

Can the battery full threshold be adjusted on this board?

Yes - the battery full threshold (IBF) is set by resistor R5 (3.4 kΩ), per the formula IBF = 1700 Ω / R5. Substituting R5 = 3.4 kΩ yields ~500 mA termination current. Users may replace R5 with other 1% film resistors to adjust termination current between ~200 mA and ~1 A, enabling customization for different battery capacities or aging profiles.

Is the EV2608DQ-00A compatible with batteries other than 4.2 V Li-ion?

No - the board is factory-configured for 4.2 V single-cell Li-ion chemistry only, with fixed CV regulation and associated safety thresholds (e.g., overvoltage lockout, trickle charge cutoff). Altering output voltage requires redesigning feedback network components and revalidating thermal, timing, and protection behavior - not supported out-of-box.

Does the board include thermal management features?

Yes - the MP2608DQ IC integrates thermal foldback and shutdown (125°C typical), and the EV2608DQ-00A PCB uses copper pour and component placement aligned with MPS thermal guidelines. The QFN10 package of U1 is soldered directly to exposed pad thermal land, and no heatsink is required for ≤1 A operation at ambient ≤40°C.