Texas Instruments BQ2573 Series, User Manual, Page: 2 / 27

1 Introduction
1.1 EVM Features
This EVM supports the following features:
• Evaluation module for the BQ2573X devices
• Supports 3.5- to 26-V input source
– 3.5- to 26-V, 0- to 10-A input operating range and 1–5 cell battery configuration
– Supports USB2.0, USB 3.0, USB 3.1 ( USB Type-C
™ ) and USB_PD
– Supports USB OTG with 3- to 24-V adjustable output
– Supports Fast Role Swap (FRS) feature for USB_PD
• Narrow VDC (NVDC) power path management
– Instant-on works with no battery or deeply discharged battery
– Battery supplements system when adapter is fully-loaded
• 400-kHz or 800-kHz switching frequency for high efficiency
• Power Path (BQ25730) or Non Power Path (BQ25731) options
• Power and Current Monitor for CPU Throttling
• Safety
– Thermal shutdown
– Input and system overvoltage protection
– MOSFET overcurrent protection
• Charge status outputs for LED or host processor
• Maximum power tracking capability by input voltage regulation
• Test points for key signals available for testing purposes. Easy probe hook-up.
• Jumpers available. Easy-to-change connections.
1.2 General Description
The BQ2573X evaluation modules are complete charger modules for evaluating an I
2
C-controlled buck boost
charge using the BQ2573X devices.
The BQ2573X EVM does not include the EV2400 interface board. To evaluate the BQ2573X EVM, order an
EV2400 interface board separately.
The BQ2573X is a synchronous NVDC-1 battery buck boost charge controller, offering a low component count,
high efficiency solution for space-constrained, multi-chemistry battery charging applications.
The BQ2573X charges the battery from a wide range of input sources including a 5-V USB adapter to a high-
voltage USB PD source and traditional adapters.
During power up, the charger sets the converter to buck, boost, or buck-boost configuration based on the input
source and battery conditions. During the charging cycle, the charger automatically transits among buck, boost,
and buck-boost configuration without host control.
The BQ2573X monitors adapter current, battery current, and system power. The flexible programmed
PROCHOT output goes directly to the CPU for throttle back, when needed.
For more details on register functions, see the BQ25730 I
2
C 1-5 Cell Narrow VDC Buck-Boost Battery Charge
Controller With System Power Monitor and Power Path Control and BQ25731 I
2
C 1-5 Cell Narrow VDC Buck-
Boost Battery Charge Controller Data Sheets .
Table 1-1 lists the I/O descriptions.
Table 1-1. I/O Description
Jack Description
J1–VIN Input: positive terminal
J1–PGND Input: negative terminal (ground terminal)
J2-CHRG_OK CHRG_OK output
Introduction www.ti.com
2 BQ2573X Evaluation Module SLUUCB9A – JUNE 2020 – REVISED JANUARY 2021
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