MEZS7-1S-4SPDCharger Reference Design
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Description
The MEZS7-1S-4SPDCharger is a solution module for PD applications with the MP2760 and CCG3PA, supporting PD3.0 and BC1.2 protocols. The MP2760 is a buck-boost charger designed for battery packs with 1 cell to 4 cells in series. The device supplies a wide 3V to 21V voltage range at the IN pin in source mode. This is compliant to the USB PD specifications. The CCG3PA is a Cypress PD controller that handles the PD protocol.
The board contains a DRP Type-C port. When an adapter is inserted, the port acts as a UFP to charge the battery with a maximum 5A charge current. When a load is inserted, the port acts as a DFP to power the USB from the battery.
The board supports narrow-voltage DC (NVDC) power path management, which makes this board well-suited for different portable applications, such as tablets, MIDs, and smartphones. Its low-impedance power path optimizes efficiency, reduces battery charging time, and extends battery life.
Performance Summary (1)
Specifications are at TA = 25°C, unless otherwise noted.
Parameter | Conditions | Value |
Input voltage (VIN) range | 4V to 22V | |
Battery charge regulation voltage (VBATT_REG) | 8.4V (I2C-configurable) | |
Fast charge current | VIN = 9V to 20V | 5A (I2C-configurable) |
Output voltage in source mode (VIN_SRC) | 3V to 21V | |
Charge typical efficiency | VIN = 20V, VBATT = 8V, ICC = 5A | 93.49% |
Charge peak efficiency | VIN = 12V, VBATT = 8V, ICC = 3A | 96% |
Source mode typical efficiency | VBATT = 7.4V, VIN_SRC = 20V, IIN_SRC = 1.5A | 93.5% |
Source mode peak efficiency | VBATT = 8.4V, VIN_SRC = 12V, IIN_SRC = 1.5A | 96.37% |
Switching frequency (fSW) | 600kHz (I2C-configurable) |
1) Refer to the MP2760 datasheet for more details.
Evaluation Board

LxWxH (8.9cmx8.9cmx0.16cm)
Board Number | MPS IC Number |
MEZS7-1S-4SPDCharger | MP2760GVT |
Quick Start Guide
The MEZS7-1S-4SPDCharger is a reference design using the M2760 for PD applications, and includes a DRP Type-C port. Its layout accommodates most commonly used capacitors. The charge current is preset to 5A, and the charge-full voltage is preset to 8.4V for a Li-ion battery with 2 cells in series. In USB On-The-Go (OTG) mode, the output is preset to 5V/3A. All of the charging/discharging parameters are set by the CCG3PA. The user can download their own codes to the CCG3PA through the board’s configuration header.
- Connect the load to:
- Positive (+): VSYS
- Negative (-): GND
- Connect the battery terminal to:
- Positive (+): VBATT
- Negative (-): GND
- If using a battery simulator, preset the battery voltage between 0V and 8.4V, then turn it off. Connect the battery simulator’s ports to:
- Positive (+): VBATT
- Negative (-): GND
- Ensure that the battery voltage is present (if using a battery simulator, keep the simulator on).
- For charge mode testing, connect the Type-C port to an adapter with a USB Type-C to Type-C or Type-A to Type-C cable. Charge mode should start automatically.
- For source mode testing, connect the device to a Type-C port with a USB Type-C to Type-C, Type-C to Micro-B, or Type-C to lighting cable. Source mode should start automatically.
Figure 1 shows the measurement equipment set-up.

Figure 1: Measurement Equipment Set-Up
Evaluation Board Schematic

Figure 2: Evaluation Board Schematic
Solution Module Test Results
Performance curves and waveforms are tested on the evaluation board. CIN = 5 x 10µF + 1 x 1µF, CSYS = 5 x 22µF + 1 x 1µF, CBATT = 2 x 22µF, L = 1.5µH (10mΩ), TA = 25°C, unless otherwise noted.



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