Monolithic Power Systems Inc. MEZS7-1SSAPOWERBANK

Overview

MEZS7-1SSAPowerBank from Monolithic Power Systems is a complete, form-fitting power bank solution module built around the MP2632 IC, integrating a 3A buck battery charger with BC1.2 detection, dual-output 3A boost converter, and 4-LED fuel gauge. It operates in charge mode (4.55–6V input, up to 3A charge current) or boost mode (3–4.45V battery input, 5V/3A SYS output), supporting smartphones, tablets, and portable devices.

For engineers reviewing the MEZS7-1SSAPowerBank datasheet, MEZS7-1SSAPowerBank pinout, MEZS7-1SSAPowerBank application, or MEZS7-1SSAPowerBank equivalent, this module delivers verified system-level functionality - including input over-voltage protection, battery temperature monitoring, thermal shutdown, timer-based dead-battery protection, and reverse boost operation - without requiring custom layout or firmware integration.

Technical Context

The MEZS7-1SSAPowerBank implements a dual-path power management architecture: during charge mode, the MP2632 regulates input current (up to 2.7A) and battery voltage (selectable 4.2/4.35/4.45V ±0.5%) while powering the system via SYS rail; in boost mode, it enables reverse-directional conversion from battery to 5V SYS output with programmable 3A current limit and automatic shutdown after 16s no-load.

It integrates discrete protection elements including an AM2336N N-MOSFET for battery reverse leakage blocking, FS312F-P battery protection IC, and 8205A dual-N MOSFET for cell balancing. LED drivers are configured for voltage-based state-of-charge indication, distinguishing charge vs. boost states via dedicated LEDTC control.

Key Specifications

Availability

MEZS7-1SSAPowerBank is available at Aetrix Electronics and suitable for portable power backup, consumer electronics power banks, and USB-C PD companion systems requiring stable component supply, rapid time-to-demo, and production-ready reference design validation.

Supply support for MEZS7-1SSAPowerBank 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 control solutions for consumer, industrial, and automotive markets.

The MEZS7-1SSAPowerBank belongs to MPS's evaluation and solution module product line, designed to accelerate development of compact, certified-compliant portable power systems by delivering pre-validated hardware, layout, and configuration settings for the MP2632.

FAQ

What input sources are supported in charge mode?

The MEZS7-1SSAPowerBank accepts 4.55–6V USB inputs, including standard USB ports, wall adapters, and powered hubs. It performs BC1.2 detection to auto-configure input current limits (500mA for SDP, programmable up to 2.7A for DCP/CDP), and includes input voltage regulation to prevent collapse under cable loss or weak sources.

How is battery charge voltage selected?

Charge-full voltage is set via R1/R2 resistor combinations on the board: floating both yields 4.2V; grounding R2 sets 4.35V; grounding R1 sets 4.45V. All options maintain ±0.5% accuracy, enabling compatibility with standard Li-ion, high-voltage Li-ion, and Li-polymer chemistries.

Does the module support simultaneous charge and boost operation?

No - the MEZS7-1SSAPowerBank operates exclusively in charge mode when 5V input is present, and switches to boost mode only when input is removed. The PB pin controls mode transition, and the MP2632 enforces strict separation to prevent backfeed or conflict between paths.

What protections prevent battery over-discharge?

The module integrates the FS312F-P battery protection IC, which monitors cell voltage and forces sleep mode below over-discharge threshold (~2.5V). Boost operation remains disabled until battery voltage exceeds this threshold, and manual wake-up requires brief connection to 5V input via USB2.

Can the 4-LED fuel gauge be reconfigured for custom SOC mapping?

Yes - the four LED drivers are voltage-based and driven directly by MP2632 internal comparators. Thresholds are fixed per MP2632 design, but external resistor dividers on LED1–LED4 anode lines can shift activation points; reference schematics in the MP2632 datasheet provide scaling guidance.

Is thermal performance validated under full 3A boost load?

Yes - the module's 7.16 × 1.8 × 0.16 cm PCB layout includes optimized copper pours and thermal vias beneath U2 (MP2632GR QFN-26) and L1 (2.2µH inductor). Measured temperature rise is ≤22°C above ambient at 3A/5V boost with 200LFM airflow, per Rev. 1.1 test report.

What is the role of SW1 push button?

SW1 provides three functions: short press (>1.5ms) initiates boost mode; long press (>2.5s) disables boost; double-click toggles LEDTC (temperature indicator LED). Its signals interface directly with MP2632's PB and TC pins, requiring no external MCU or firmware.