Monolithic Power Systems Inc. EV2770-L-00A

Overview

EV2770-L-00A from Monolithic Power Systems is an evaluation board for the MP2770 single-cell Li-ion/Li-polymer switching charger IC, featuring I²C-configurable power path management, 6A charging, and 3.65A boost output up to 16V. It supports 4–16V input (USB PD, wall adapters), delivers regulated SYS power during charge or boost, and enables full parameter tuning including I_{IN_LIM}, V_{BATT_REG}, V_BOOST, thermal regulation, and JEITA-compliant battery temperature profiling.

For engineers reviewing the EV2770-L-00A datasheet, EV2770-L-00A pinout, EV2770-L-00A application, or EV2770-L-00A equivalent, this board provides validated hardware reference, GUI-driven configuration of MP2770 registers, real-time telemetry via integrated ADC, and dual-output boost operation with Q1 (IN) and Q2 (SYS) MOSFET control - critical for portable power architecture validation.

Technical Context

The EV2770-L-00A implements the MP2770's full functional stack: integrated IN-to-SYS pass-through path enabling system operation while charging; VIN-regulated input current limiting (I_{IN_LIM}) with programmable clamp voltage; and bidirectional power flow supporting both charge mode (VIN → battery + SYS) and boost mode (battery → IN/SYS). Its design includes dedicated test points (VIN, VBATT, VSYS, VSW, VPMID), configurable feedback resistors for 5/9/12/15V boost outputs, and jumper-selectable V_BOOST settings.

It integrates a QFN-packaged MP2770R2 IC with 600kHz switching frequency, 10mΩ internal sense resistor, and support for JEITA-compliant thermal charge management using NTC monitoring. The board accommodates standard 0603/0805 passives and uses a 1µH, 15A inductor (Wurth 744311100) and 30V Schottky diode (B330A), enabling stable operation across 4–16V input and 3.65A boost loads at up to 96.2% peak efficiency.

Key Specifications

Availability

EV2770-L-00A is available at Aetrix Electronics and suitable for portable medical devices, USB-C power banks, rugged handhelds, and industrial IoT edge nodes requiring stable component supply, rapid power architecture validation, and production-ready reference design fidelity.

Supply support for EV2770-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 power management ICs, with expertise in DC-DC conversion, battery management, and motor drivers for consumer, industrial, and automotive markets.

The MP2770 product line targets highly integrated, I²C-programmable battery charging and power path solutions for space-constrained portable electronics - emphasizing flexibility, thermal resilience, and seamless transition between charge and boost modes.

FAQ

What is the primary function of the EV2770-L-00A evaluation board?

The EV2770-L-00A is a fully assembled, tested reference platform for the MP2770 switching charger IC. It demonstrates all core functions - including I²C-configurable charge parameters (I_{IN_LIM}, V_{BATT_REG}, I_CHG), dual-path boost output (IN and SYS), JEITA thermal management, and VIN-regulated power path - using production-grade layout, components, and firmware interface.

Which software and hardware are required to operate the EV2770-L-00A?

Operation requires the MP2770 Evaluation GUI (downloadable from MPS), a Windows PC with USB port, the EVKT-USBI2C-02 USB-to-I²C adapter, and standard lab equipment (power supply, battery simulator, multimeter). CN2 is the sole required I²C connector; jumpers JP1–JP3 configure fixed V_BOOST (9V/12V/15V), while default V_BOOST is 5V when all are open.

Can the EV2770-L-00A operate without an external I²C host?

No - the board lacks autonomous firmware and relies entirely on the MP2770 GUI for register configuration, real-time telemetry readback (VBATT, VIN, IBATT, VNTC, etc.), and mode control. All charge/boost parameters, safety timers, JEITA thresholds, and OVP settings must be written via I²C; no default "standalone" operation is supported beyond factory presets (e.g., 4.2V V_{BATT_REG}, 2A I_CHG).

How does the board handle power path arbitration between input source and battery?

When VIN is present, the MP2770 prioritizes powering SYS directly from VIN while simultaneously charging the battery - with input current limited by I_{IN_LIM} and VIN regulated to prevent adapter overload. If VIN drops or disconnects, the IC automatically transitions to boost mode, sourcing power from the battery to maintain SYS and/or IN rails, with configurable V_BOOST and I_BOOST limits.

What are the key thermal performance metrics measured on this board?

At 15V input, 3.8V battery, and 3A charge current (no forced airflow), case temperature reaches 57.6°C. In boost mode at 15V V_BOOST, 3.8V battery, and 1.5A load, case temperature rises to 67.1°C. These results validate the MP2770's thermal regulation circuitry and PCB copper pour design, confirming stable operation within specified junction temperature limits (up to 120°C).

Does the board support USB Type-C PD negotiation?

The EV2770-L-00A itself does not include a PD controller IC; however, its schematic and layout accommodate integration with external PD controllers (e.g., for USB-C detection and VBUS configuration). The board's IN rail can be driven by a PD controller's VBUS output, and the MP2770's VIN_OVP and I_{IN_LIM} settings can be synchronized to match negotiated PD profiles - but PD functionality requires separate controller hardware.