MPS EVKT-MP2723A Evaluation Kit User Guide

MPS EVKT-MP2723A Evaluation Kit

Overview

Introduction
The EVKT-MP2723A is an evaluation kit for the MP2723A when it is used as a standalone switching charger with integrated USB detection and USB On-The-Go (OTG) operation. The board’s layout accommodates the most commonly used capacitors. The default function of this board is preset for charger mode, and the charge-full voltage is preset to 4.2V for a single-cell Li-ion battery.

Kit Contents
EVKT-MP2723A kit contents (items below can be ordered separately, and the GUI installation file and supplemental documents can be downloaded from the MPS website):

Features and Benefits

•  3.7V to 5.5V Operating Input Voltage (VIN) Range

•  Up to 22V Sustainable Voltage

• High-Efficiency, 3A, 1.35MHz Buck Charger
  Up to 92% Charge Efficiency at 3A Charge Current
  Auto-Detection for USB Standard Downstream Port (SDP), Charging Downstream Port (CDP), Dedicated Charging Port (DCP), and Non-Standard Adapters

•  USB On-The-Go (OTG) with 4.8V to 5.5V Adjustable Output: Up to 1.5A Output and 93% Efficiency

•  High Battery Discharge Efficiency with 14mΩ BATFET up to 8.5A

•  Integrated Analog-to-Digital Converter (ADC) for Monitoring VIN, Input Current, Battery Voltage, Charge Current, System Voltage, and Battery Temperature

• Narrow Voltage DC (NVDC) Power Path Management
  Instant-On Works with No Battery or Deeply Discharged Battery
  Ideal Diode Operation in Battery Supplemental Mode

•  Constant-Off-Time Control to Reduce Charging Time under Lower VIN Conditions

•  I2C Port for Flexible System Parameter Setting and Status Reporting

•  Full DISC Control to Support Shipping Mode and System Restart

• High Accuracy
  ±0.5% Charge Voltage Regulation
  ±5% Charge Current Regulation
  ±5% Input Current Regulation
  ±2% Output Regulation in Boost Mode

• High Integration
  Fully Integrated Power Switches and No External Blocking Diode
  Built-In Robust Charging Protection, including Battery Temperature Monitoring and Configurable Timer
  Built-In Battery Disconnection Function

• Safety
  Configurable JEITA for Battery Temperature Protection
  Thermal Regulation and Thermal Shutdown
  Watchdog Monitoring I2C Operation
  Input/System Over-Voltage Protection (OVP)
  MOSFET Over-Current Protection (OCP)
  Supports Temperature Protection in Battery Side

•  Charging Operation Indicator

•  On-Chip Thermal Limiting Regulation

WARNING:
All changes made in I2C mode are not retained once the EVB shuts down. Information written in OTP mode cannot be changed.

Adjustable Features:

·         Charge-Full Voltage

·         Charge Current

·         VIN Regulation

·         Input Current Limit

·         Pre-Charge Current

·         Charge Termination Current

·         VSYS_MIN Regulation Current

·         Auto-Recharge Threshold

·         NTC Comparing Ratio

·         OTG Voltage Regulation

·         OTG Current Limit

| ·         IIN_LIM Default Value

·         VIN_MIN Default Value

·         ICC Default Value

·         VBATT_REG Default Value

·         CHG_TMR Default Value

·         IINLIM RESET_EN Default Status

·         VINMIN RESET_EN Default Status

·         ADDRESS Default Status

·         PFM_EN Default Status

Kit Specifications:

Features                                        Specification

• Board Supply                            3.7V to 5.5V
• Operating Input Voltage           3.7V to 5.5V
• Operating Systems Supported  Windows XP, 7, or later
• System Requirements                Minimum 22.2MB free
• GUI Software                          MP2723A V1.0

Hardware Specifications

Personal Computer Requirements
The following minimum conditions must be met to use the EVKT-MP2723A:

•  The operating system of Windows XP, 7, or later
•  Net Framework 4.0
•  PC with a minimum of one available USB port
•  At least 22.2MB of free space

EV2723A-QC-00A Specifications
The EV2723A-QC-00A is an evaluation board for the MP2723A (see Figure 2). For more information, refer to the EV2723A-QC-00A datasheet.

EVKT-USBI2C-02 Specifications
The EVKT-USBI2C-02 refers to the USB-to-I2C communication interface device, which connects the EVB, the PC, and its supporting accessories (see Figure 3). It provides I2C capabilities. Together with MPS’s Virtual Bench Pro and GUI tools, it provides a quick and easy way to evaluate the performance of MPS digital products. For more details, refer to the EVKT-USBI2C-02 datasheet.

 Software Requirements

Software Installation Procedure
Programming occurs through the MPS I2C GUI. Follow the instructions below to install the software:
Note: This software can be downloaded from the MPS website.

1. Download and extract the zip package titled “MP2723A I2C Evaluation GUI”.
2.  Double-click the “.exe” file to open the software (see Figure 4). If a protection window comes up, click “More info,” then click “Run anyway.”
3.  Follow the prompts in the set-up guide.
4.  Wait for the status screen to verify that installation is complete (see Figure 5).

 Evaluation Kit Test Set-Up

Hardware Set-Up
The hardware must be properly configured prior to use. Follow the instructions below to set up the EVB:

1.  Locate the proper wires to connect the EVB to the EVKT-USBI2C-02 communication interface.
2.  Connect SCL, SDA, and GND (see Figure 6). Refer to the MP2723A datasheet for further clarification.

Powering Up the EVB:

1. Connect the load terminals to:
   Positive (+): VSYS
   Negative (-): PGND

2.  Connect the battery terminals to:
   Positive (+): VBATT
   Negative (-): PGND

3.  If using a battery simulator, preset the battery voltage between 0V and 4.2V, then turn it off.

4.  Connect the battery simulator output to the BATT and PGND pins.

5.  Preset the power supply output between 3.7V and 5.5V, then turn off the power supply.

6.  Connect the power supply output terminals to:
   Positive (+): VIN
   Negative (-): PGND

7.  Ensure the battery voltage is present, then turn on the power supply (if a battery simulator is used, turn on the battery simulator). The device should start up automatically.

Software Set-Up
After connecting the hardware according to the steps above, follow the steps below to use the GUI software:

• Start the software. It should check the EVB connection automatically.
•  If the connection is successful, both the USB and evaluation board statuses should be listed as “Connected” in green (see Figure 7).

•  If the connection is unsuccessful, the statuses are listed as “Not Connected” in red. Check the connections between the EVB, communication interface, and PC. Re-plug the USB into the computer.
  If the evaluation board is listed as “Not Connected,” this means that the evaluation board is not connected correctly.
  If the USB is listed as “Not Connected,” this means that the USB I2C communication interface is not connected correctly.

1.  Click the “Read All” button to read the I2C register values. The default values are displayed (see Figure 7).
2. Find the item to be changed, then select the desired value from the drop-down menu.
3.  Click the “Write All” button to update values. The changed information should download to the IC.

WARNINGS:
All changes made via the I2C are restored to default values once the EVB shuts down.

Troubleshooting Tips
EVKT-USBI2C-02 Driver Installation Problem
If the USBI2C-02 driver is not properly installed, manual installation is required. Follow the steps below to manually install the EVKT-USBI2C-02 driver:
Note: Check the driver version. Find “USBXpress Device” in the Device Manager under USB controllers.

Right-click and view properties. Ensure the driver version matches the newest version. If the PC is running Windows 10, Windows 10 may automatically install the older USB driver, which is not compatible. The correct driver version should be newer than 4.0.0.0 (see Figure 8).

1. Install the correct USBXpress “.exe” file.
   Choose either the 32-bit or 64-bit operating system. 32- bit: \EVKT-USBI2C-02 USB Driver\ USBXpressInstaller_x86.exe
   64-bit: \EVKT-USBI2C-02 USB Driver\ USBXpressInstaller_x64.exe

2. Connect the EVKT-USBI2C-02 communication interface to the PC with the USB cable.

No Supply

The IC’s input pin has an under-voltage lockout (UVLO) detection circuit. If the input voltage (VIN) is below the UVLO rising threshold, the charging function is disabled.

No Charging Event

If the IC detects that VIN is below the UVLO falling threshold (the device enters a no-supply state) or over-temperature protection (OTP) is triggered (the device enters a shutdown state), then the IC stops switching and charging is suspended.

Thermal Recovery

If the die temperature exceeds the thermal protection threshold, then the MP2723A enters a shutdown state. The IC starts up again once the die temperature decreases.

Ordering Information

The components of the evaluation kit can be purchased separately, depending on user needs. The GUI installation file and supplemental documents can be downloaded from the MPS website.

Order directly from MonolithicPower.com or our distributors.

REVISION HISTORY:

References

• MPS | Monolithic Power Systems

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