Monolithic Power Systems Inc. MEZS7-1S-4SPDCHARGER

Overview

MEZS7-1S-4SPDCharger from Monolithic Power Systems is a reference design evaluation module integrating the MP2760 buck-boost charger IC and CYPD3171 PD controller for USB Power Delivery 3.0 and BC1.2 bidirectional charging. It supports 1S–4S Li-ion battery packs, delivers up to 5A charge current, operates with 4V–22V input, and provides 3V–21V source-mode output via a DRP Type-C port. Designed for portable electronics development, it enables rapid validation of NVDC power path management in tablets and smartphones.

For engineers reviewing the MEZS7-1S-4SPDCharger datasheet, MEZS7-1S-4SPDCharger pinout, MEZS7-1S-4SPDCharger application, or MEZS7-1S-4SPDCharger equivalent, this module serves as a production-ready hardware platform to verify PD negotiation, buck-boost charging efficiency (96% peak), thermal performance under 5A load, and I²C-configurable parameters including charge voltage (8.4V), switching frequency (600kHz), and OTG output.

Technical Context

This module implements a dual-IC architecture: the MP2760 handles high-efficiency buck-boost battery charging and discharging with integrated MOSFET drivers, while the CYPD3171 manages USB PD protocol stack, VBUS monitoring, and Type-C role detection. The board uses narrow-voltage DC (NVDC) power path topology to decouple system rail (VSYS) from battery voltage, enabling seamless transition between charge and source modes without system brownout.

It features fixed 600kHz switching frequency (I²C-tunable), supports 5A fast charge at VIN = 9–20V, delivers 93.5% typical source-mode efficiency at 20V/1.5A, and maintains thermal stability during sustained 5A charge with VIN = 20V and VBATT = 8.2V - validated per MPS test conditions using 1.5µH inductor and specified capacitor network.

Key Specifications

Availability

MEZS7-1S-4SPDCharger is available at Aetrix Electronics and suitable for USB PD reference design validation, portable device battery subsystem prototyping, and NVDC power path integration requiring stable component supply and documented thermal performance under 5A continuous load.

Supply support for MEZS7-1S-4SPDCharger 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 USB PD solutions for consumer, computing, and industrial applications.

The MEZS7 series represents MPS's reference design ecosystem for USB PD-enabled battery-powered systems, built to accelerate time-to-prototype for engineers implementing bidirectional buck-boost charging with full PD 3.0 compliance and robust thermal behavior.

FAQ

Is MEZS7-1S-4SPDCharger still in active production?

No. This module is End-of-Life (EOL) as stated in the official documentation. MPS explicitly directs users to migrate to the replacement part MEZS7-PDCharger-MP2760. No new orders are accepted, and inventory is limited to remaining stock at authorized distributors.

What ICs are integrated on the MEZS7-1S-4SPDCharger board?

The board integrates two key ICs: the MP2760GVT (TQFN-30, 4mm×5mm) buck-boost charger IC and the CYPD3171-24LQXQ (QFN-24, 4mm×4mm) Cypress USB PD controller. Supporting components include SISA14DN-T1-GE3 MOSFETs, B0520LW-7-F Schottky diodes, and MPL-AL5030-1R5 inductor.

Can the charge voltage and current be reconfigured?

Yes. Both battery regulation voltage (default 8.4V for 2S) and fast charge current (default 5A) are I²C-configurable via the CYPD3171 controller. Users can modify these parameters using the configuration header (JP2) and custom firmware loaded onto the CCG3PA-based controller.

Does the board support USB On-The-Go (OTG)?

Yes. In source (DFP) mode, the board supports OTG with preset 5V/3A output. When a load is connected to the Type-C port, the CYPD3171 negotiates PD contracts and configures the MP2760 to deliver regulated output - verified across 5V, 9V, 12V, 15V, and 20V profiles.

What is the purpose of the VSYS and VBATT test points?

VSYS provides access to the system power rail decoupled from battery voltage via NVDC architecture; VBATT connects directly to the battery terminals. These test points enable independent measurement of system rail stability during charge/discharge transients and validation of power path isolation under dynamic load changes.

How is thermal performance validated on this board?

Thermal data is published in the official documentation: under charge mode (VIN = 20V, ICC = 5A, VBATT = 8.2V), temperature rise is measured per test setup; under source mode (VBATT = 8.4V, VSRC = 20V, IIN_SRC = 1.8A), thermal imaging confirms safe operation within rated limits using the onboard MOSFETs and inductor.