Monolithic Power Systems Inc. EV2759-Q-01A

Overview

EV2759-Q-01A from Monolithic Power Systems is an evaluation board for the MP2759 switching battery charger IC, designed to validate power path management and multi-cell Li-ion/Li-polymer charging in 1S–6S configurations. It supports up to 36V input, delivers up to 3A charge current, and enables adjustable per-cell regulation voltages (3.6V–4.4V) with 0.5% accuracy - used for rapid prototyping of industrial medical equipment, power tools, and portable robotics.

For engineers reviewing the EV2759-Q-01A datasheet, EV2759-Q-01A pinout, EV2759-Q-01A application, or EV2759-Q-01A equivalent, this board provides validated test points (VIN, BATT, SYS, SW, PMID), jumper-configurable parameters (cell count, charge current, input limit, V_{BATT_REG}), thermal monitoring via NTC interface, and OR-ing power path operation under real-world load and battery insertion conditions.

Technical Context

The EV2759-Q-01A implements the MP2759's full charging state machine - trickle, pre-charge, constant-current (CC), and constant-voltage (CV) - with independent input current limiting (1A/1.5A/2A), minimum input voltage lockout (10V/15V/22V/28V), and JEITA-compliant battery temperature monitoring. It validates the IC's 700kHz/450kHz selectable switching frequency and dual-MOSFET power path architecture (AM4417P + 2N7002MTF).

Board-level validation includes hot-insertion robustness (VIN and VBATT spikes clamped by TVS diodes), PMID rail stability (2.2µF ceramic + Schottky diode), and dynamic load sharing between input source and battery during system operation - confirmed across 4-cell (16.8V) and 6-cell (25.2V) battery stacks at up to 3A charge current and 96% peak efficiency.

Key Specifications

Availability

EV2759-Q-01A is available at Aetrix Electronics and suitable for industrial medical equipment, cordless power tools, and autonomous robot development requiring stable component supply, fast evaluation turnaround, and production-ready reference design validation.

Supply support for EV2759-Q-01A 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 converters, battery chargers, LED drivers, and motor drivers for industrial, automotive, and consumer applications.

The MP2759 product line targets high-voltage, multi-cell portable systems requiring integrated power path management, precise battery regulation, and robust thermal/safety protection - enabling compact, reliable charging subsystems without external controllers.

FAQ

What battery chemistries and configurations does the EV2759-Q-01A support?

The board validates the MP2759's support for 1-cell to 6-cell series Li-ion and Li-polymer batteries, with user-selectable per-cell regulation voltages of 3.6 V, 4.0 V, 4.15 V, 4.2 V, 4.35 V, or 4.4 V via JP1–JP6 jumpers. It does not support NiMH, lead-acid, or LFP chemistries per the MP2759 datasheet.

How is input overvoltage and hot-insertion handled on this board?

The board uses a BZT52C11 Zener diode (11 V) on the DISABLE line and recommends TVS diodes on VIN and PMID for >20 V input or battery hot-insertion scenarios. Per Figure 1 notes and Table 4, a TVS clamp is required if VIN spikes exceed 45 V or PMID exceeds its absolute maximum rating during transient events.

Can the EV2759-Q-01A operate safely above 20 V input?

Yes - but only with mandatory modifications: a ≥47 µF/50 V electrolytic capacitor must be added between VIN and GND, and a Schottky diode (e.g., B240A) must be placed between VIN and PMID. The default 1 µF ceramic capacitor is rated only for ≤20 V adapter applications per Table 4 recommendations.

What are the key test points and their functions?

TP1/VIN and TP2/GND connect to the input source; TP5/BATT and TP4/GND to the battery pack; TP3/SYS and TP6/GND to the system load. TP7/SW monitors the switching node waveform; TP10/PMID measures the power path output; TP8/ACOK indicates input presence; TP9/STAT signals charge status - all documented in Table 1 of the Rev. 1.0 user guide.

Does the board support JEITA-compliant charging profiles?

Yes - it implements JEITA thermal regulation using two 10 kΩ NTC thermistors (RNTC1, RNTC2) and a configurable voltage divider via JP13. The MP2759 interprets NTC resistance to adjust charge current/voltage based on battery temperature zones (cold/hot), as verified in EVB test waveforms on page 8–9.

What is the maximum validated charge current and efficiency?

The board achieves up to 3 A constant-current charge with 96% peak efficiency at VIN = 24 V, VBATT = 16.8 V (4S), and IBATT = 3 A. Efficiency drops to 92% at VIN = 30 V, VBATT = 25.2 V (6S), confirming optimal performance within the MP2759's 700 kHz switching mode and low-R_DS(on) MOSFET layout.