Monolithic Power Systems Inc. MEZS7-1SDAPOWERBANK

Overview

MEZS7-1SDAPOWERBANK from Monolithic Power Systems is a pre-validated, all-in-one power bank solution module built around the MP2632 QFN-26 IC. It integrates a 3A buck battery charger with BC1.2 detection, dual-output 5V boost converter (up to 3A total), and 4-LED fuel gauge - enabling seamless charge/boost mode switching based on input presence. Designed for portable dual-USB power banks charging single-cell Li-ion batteries.

For engineers reviewing the MEZS7-1SDAPOWERBANK datasheet, MEZS7-1SDAPOWERBANK pinout, MEZS7-1SDAPOWERBANK application, or MEZS7-1SDAPOWERBANK equivalent, key selection criteria include its dual-mode power path management, programmable 4.2/4.35/4.45V charge voltage, integrated thermal and overvoltage protections, and board-level validation of 94% boost efficiency at 3A.

Technical Context

The MEZS7-1SDAPOWERBANK implements a complete system-level power architecture: the MP2632 manages bidirectional power flow between USB input (4.55–6V), single-cell battery (3–4.45V), and dual SYS outputs. It uses internal BC1.2 detection to auto-configure input current limits (500mA–2.7A) and supports voltage-based state-of-charge indication via four independent LED drivers.

Charge mode prioritizes system load while regulating battery charge current up to 3A; boost mode activates on VIN removal and delivers regulated 5V SYS output with programmable 3A current limit per port. Protection includes input OVP, battery OVP/UVP, thermal shutdown, and battery temperature monitoring via external NTC.

Key Specifications

Availability

MEZS7-1SDAPOWERBANK is available at Aetrix Electronics and suitable for portable power bank development, dual-output USB charging systems, and battery-backed embedded portable devices requiring stable component supply and rapid time-to-demonstration.

Supply support for MEZS7-1SDAPOWERBANK 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 charging, and power path management for consumer, industrial, and automotive applications.

The MEZS7-1SDAPOWERBANK belongs to MPS's reference design solution module family, engineered to accelerate development of compact, safety-certifiable power banks by integrating layout-optimized components, validated firmware behavior, and production-ready protection schemes.

FAQ

What are the default settings for charge voltage and input current limit?

The MEZS7-1SDAPOWERBANK ships with a default charge-full voltage of 4.2V (R1 and R2 floating) and an input current limit of 2.7A (RILIM = 14.7kΩ). These values can be reconfigured using external resistors per the MP2632 datasheet equations - no firmware or programming interface is required.

How does the module switch between charge and boost modes?

Automatic mode switching is hardware-controlled: when 5V is present at USB1, the module enters charge mode; removal of VIN triggers boost mode after a brief delay. Manual activation is also supported via SW1 push-button (≥1.5ms low pulse), and boost disables after 2.5s long press or 16s no-load timeout.

Can the two USB outputs deliver full 3A simultaneously?

No - the 3A SYS output current limit is shared across both USB ports. The actual current per port depends on connected load impedance and is dynamically allocated by the MP2632's internal current-sense circuitry. Total sustained output must not exceed 3A to avoid foldback limiting.

What battery protection features are implemented?

The module integrates FS312F-P battery protection IC for overcharge, over-discharge, overcurrent, and short-circuit protection. It also monitors battery temperature via an external NTC thermistor (RT1/RT2), and includes reverse leakage blocking to prevent battery drain when unpowered.

Is the 4-LED fuel gauge calibrated to battery voltage or coulomb counting?

The LED indicator is voltage-based and maps directly to battery terminal voltage ranges (e.g., LED1 only lit at <3.4V, all LEDs lit at ≥4.15V). It does not perform coulomb counting or learn battery capacity - calibration is fixed per the MP2632's internal ADC thresholds and requires no host intervention.

What is the physical size and mounting configuration?

The module measures 7.16cm × 1.8cm × 0.16cm (L×W×H) with through-hole battery terminals (B+, B−), surface-mount USB connectors (USB1, USB2, USB3), and a tactile pushbutton (SW1). No heatsink is required under typical 3A operation due to optimized MOSFET selection and PCB copper area.