Page 14 - PEN eBook October2023

Cover Story — Design

The graph in Figure 7 shows how the battery-charging current can be modulated or terminated
based on the measured battery temperature. In addition to implementing the typical CC and CV
loop, the battery-charging algorithm can also incorporate the throttling of the charging currents

based on measured battery temperatures.

ROLE OF EZ-PD™ PMG1-B1’s PROGRAMMABILITY IN USB-C
BATTERY-CHARGING APPLICATIONS

The EZ-PD™ PMG1-B1 offers the software programmability of a traditional MCU. This allows the
developer to use firmware and configure various battery-charging parameters as well as power
delivery parameters. Below are some of the firmware-configurable features:
▶ Total number of battery cells (two to five cells)
▶ Trickle-charging and pre-charging thresholds

▶ Enable/disable individual cell monitoring
▶ Configuring individual battery cell thresholds
▶ Configuring total battery voltage and charging current
▶ Configuring thresholds for temperature monitoring
▶ Battery OV, UV, overcurrent and overtemperature protection
▶ Selecting charging algorithms (CC versus CC + CV mode)
▶ Negotiated power delivery contract voltage and current

In addition to the above features, the developers can also implement some custom features like
temperature-based power throttling and communication of battery status with an external SOC
over interfaces like I C, UART, etc.
2

CONCLUSION
As more consumer electronic devices shift toward USB-C–based battery-charging methods, new
architectures and products are emerging to reduce the complexity of battery-charger systems.
Infineon’s EZ-PD™ PMG1-B1 is built on a novel architecture offering high integration levels.

The EZ-PD™ PMG1-B1 device integrates an MCU, a USB PD block and a battery charger into a
single-chip solution, effectively reducing the system’s BOM cost and complexity. Additionally, the
programmability of EZ-PD™ PMG1-B1 empowers users to customize the battery-charging algorithm,
while the integrated hardware protection features make it an ideal solution for battery-powered
applications.

Click here to delve deeper into Infineon’s transformative USB-C high-voltage MCU technology.

Get ready to embrace the future of efficient and sustainable battery charging.

14 OCTOBER 2023 | www.powerelectronicsnews.com