Monolithic Power Systems Inc. EV2678EG-00A

Overview

EV2678EG-00A from Monolithic Power Systems is an evaluation board for the MP2678EG, a single-cell Li-ion/Li-polymer battery charger protection IC with low-dropout linear regulation, 5V regulated output, 10.4V input over-voltage protection, 1.5A current limit, and integrated fault indication (FLT pin). It demonstrates real-time protection against input OVP, battery OVP (4.35V), over-current, and over-temperature events in portable power management systems.

For engineers reviewing the EV2678EG-00A datasheet, EV2678EG-00A pinout, EV2678EG-00A application, or EV2678EG-00A equivalent, this board enables rapid validation of MP2678EG's protection behavior under controlled VIN ramp, VBATT monitoring, thermal stress, and fault response timing - critical for smartphone, PDA, and digital camera power path design.

Technical Context

The EV2678EG-00A implements the MP2678EG IC in a fully assembled QFN-8 (2mm × 2mm) layout with discrete support components including 1µF input/output ceramic capacitors (C1, C2), 10nF FLT-filter capacitor (C3), and precision resistors (R1 = 6.04kΩ, R2 = 200kΩ, R3 = 1kΩ) for CE control, VBATT scaling, and FLT LED drive. The board operates as a functional reference for the IC's linear-mode regulation and fault-triggered disconnection logic.

It replicates the MP2678EG's core protection sequencing: VIN > 10.4V triggers input OVP and opens VIN–VOUT path; VBATT > 4.35V triggers battery OVP and disconnects; IIN > 1.5A initiates OCP and forces VOUT to 0V; die temperature > ~140°C activates OTP and asserts FLT low. All fault states are observable via the FLT pin and red LED.

Key Specifications

Availability

EV2678EG-00A is available at Aetrix Electronics and suitable for smartphone power validation, portable medical device safety testing, and digital camera battery management development requiring stable component supply and traceable evaluation hardware.

Supply support for EV2678EG-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 design centers across Asia and North America and global distribution infrastructure.

The MP2678EG product line targets single-cell Li-ion battery protection in space-constrained consumer electronics, delivering integrated linear-mode regulation with multi-fault detection and fast-response disconnection logic.

FAQ

What is the purpose of the FLT pin on the EV2678EG-00A board?

The FLT (Fault) pin is an open-drain, active-low output that goes low during any fault condition - including input over-voltage (>10.4V), battery over-voltage (>4.35V), over-current (>1.5A), or over-temperature (>~140°C). It drives the red LED and can interface directly with microcontroller GPIOs for system-level fault logging and shutdown coordination.

How is battery voltage monitored on this evaluation board?

Battery voltage is monitored at the VB pin through a resistor divider formed by R2 (200kΩ) and internal IC circuitry. The MP2678EG compares the scaled VB signal to its internal 1.215V reference; when VB exceeds 1.215V × (1 + 200kΩ / R2), corresponding to ~4.35V at the battery terminal, battery OVP triggers and disconnects VIN from VOUT.

Can the EV2678EG-00A be used to evaluate different current limits?

No - the current limit is fixed at 1.5A by internal IC design and cannot be adjusted externally. The board does not include current-sense resistor options or programmable gain paths; it validates the MP2678EG's factory-set OCP threshold under real load conditions using the IC's internal sensing architecture.

What is the role of the CE pin on the EV2678EG-00A?

The CE (Chip Enable) pin controls IC operation: driving CE high (≥2.6V) enables regulation and protection functions; pulling CE low (<2.4V) disables the device and places it in ultra-low quiescent current mode. On this board, CE is accessible via test point and supports external enable/disable sequencing in host systems.

Does the board include thermal measurement capability?

The board does not include a dedicated temperature sensor or thermistor, but it enables thermal fault validation via power dissipation: applying VIN = 7V, VOUT = 5V, and IOUT = 1A generates ~2W loss, raising die temperature ~160°C above ambient - sufficient to trigger OTP (~140°C junction) and assert FLT low, confirming thermal protection functionality.

Is the EV2678EG-00A RoHS-compliant and lead-free?

Yes - all components on the EV2678EG-00A board, including the MP2678EG IC (QFN-8), Murata capacitors, Yageo resistors, and Bright LED, are RoHS-compliant, lead-free, and halogen-free per MPS corporate policy and EU Directive 2011/65/EU requirements.