Monolithic Power Systems Inc. EV2639B-R-00A

Overview

EV2639B-R-00A from Monolithic Power Systems is an evaluation board for the MP2639BGR single-cell Li-ion/Li-Polymer switch-mode charger IC, supporting dual-mode operation (charge up to 5A and boost up to 3A), programmable input voltage regulation (4.5–16V), 4.35V ±0.5% battery voltage regulation, and OTG output voltage selection (5/9/12/15V). It is used in USB PD power banks and portable power stations.

For engineers reviewing the EV2639B-R-00A datasheet, EV2639B-R-00A pinout, EV2639B-R-00A application, or EV2639B-R-00A equivalent, this page delivers verified board-level specifications, jumper-configurable operating modes, thermal and overvoltage protections, LED-based fuel gauge indication, and direct reference to the MP2639BGR IC's functional implementation on a validated 4.3cm × 4.5cm PCB layout.

Technical Context

The EV2639B-R-00A implements the MP2639BGR's dual-path architecture: charge mode uses synchronous buck conversion with adaptive input current limiting (programmable via RILIM) and input voltage regulation (VIN_MIN set by JP2–JP4); boost mode uses integrated synchronous boost with PB-triggered activation and output voltage selection (via FB divider resistors JP5–JP7).

It integrates four status LEDs indicating battery level (based on VH voltage) and mode (charge vs. boost), NTC-based temperature monitoring (VNTC pin), programmable safety timer (CTMR), and independent protection circuits for input overvoltage, battery overvoltage, thermal shutdown, and dead-battery charge timeout - all directly mapped from MP2639BGR's internal registers and analog comparators.

Key Specifications

Availability

EV2639B-R-00A is available at Aetrix Electronics and suitable for USB PD power banks, portable power stations, and mobile internet devices requiring stable component supply, rapid prototyping validation, and production-ready reference design fidelity.

Supply support for EV2639B-R-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 core expertise in DC/DC conversion, battery management, and motor control solutions.

The EV2639B-R-00A belongs to MPS's evaluation board product line for battery charge management ICs, designed specifically to accelerate development of single-cell Li-ion systems with integrated OTG capability and robust safety compliance.

FAQ

What is the primary function of the EV2639B-R-00A evaluation board?

The EV2639B-R-00A is a fully assembled reference design board for the MP2639BGR IC, demonstrating dual-mode operation: high-current (up to 5A) single-cell Li-ion charging and programmable-output (5/9/12/15V) boost conversion for OTG applications. It includes all necessary passives, jumpers for configuration, and LED status indicators.

How do I configure the board for 12V boost output?

To set 12V boost output, install a short on JP6 (13kΩ parallel with Rb) while leaving JP5 and JP7 open. This configures the FB voltage divider to produce 12V at VH when PB is pressed. Confirm operation using a multimeter across VH and PGND after triggering boost mode.

What input source specifications are required for full 5A charging?

A 15V/3A capable DC source is required to sustain 5A charge current. The board's input current limit is factory-set to 3A (RILIM = 71.5 kΩ); exceeding this limit causes automatic charge current reduction to maintain input current regulation, not input voltage collapse.

Does the board support battery temperature monitoring?

Yes - it implements NTC-based temperature sensing via the VNTC pin of the MP2639BGR. RNTC1 (10 kΩ) and RNTC2 (15 kΩ) form the bias network, and the board accepts standard 10 kΩ NTC thermistors connected between VNTC and AGND for real-time thermal profiling during charge/discharge cycles.

Can the EV2639B-R-00A be used without modifying jumpers?

Yes - the board ships in default charge mode (JP2 shorted, JP3/JP4 open) with 4.35V battery regulation and 5V boost output (JP5 shorted). No jumper changes are needed to evaluate basic functionality; all configurations are non-destructive and field-reversible.

What protection features are implemented in hardware?

Hardware-enforced protections include input overvoltage lockout (OVP), battery overvoltage cutoff, thermal shutdown (via die temperature sensing), NTC-based cold/hot battery detection, and a programmable safety timer that terminates charging if battery voltage fails to rise above 2.7V within a user-defined interval.