BQ25798 evaluation module I²C controlled, 1- to 4-cell, 5-A buck-boost charger, dual input and MPPT


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The BQ25798EVM evaluation module (EVM) is used to evaluate the BQ25798 device. The BQ25798 is an integrated switched-mode buck-boost battery charge management device in HOTROD (QFN) package, intended for 1-series to 4-series cell Li-ion and Li-polymer batteries from 3.6-V to 24-V input with programmable 750-KHz and 1500-KHz switching frequency. The I2C serial interface with charging and system settings makes the device a truly flexible solution. The BQ25798 has maximum power point tracking (MPPT) feature for use with HiZ power sources like solar panels.

  • Easily evaluate the high-efficiency 5-A switch-mode buck-boost charger in the HOTROD (QFN) package
  • Use of EV2400 or USB2ANY interface to switch between charge and USB On-the-Go (OTG) as well as monitor charger status and faults as well as voltages and current with an integrated analog-to-digital converter (ADC)
  • Use of an onboard USB input adapter for connecting to a USB source and either communication through D+/D– to set the default input current limit
  • Onboard test points, sense resistors and jumpers facilitate measurement of high-efficiency and high-accuracy voltage and current regulation
  • Bi-directional blocking NFETs included for evaluating dual input source selector, with jumpers to bypass

  • Includes EVM PCB
  • Does not include EV2400 or USB2ANY which is required for operation

Battery charger ICs
BQ25798 I²C controlled, 1-4-cell, 5-A buck-boost solar battery charger with dual-input selector and MPPT


Linear regulators (LDO)
TLV760 100-mA, 30-V, low-dropout voltage regulator

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Evaluation board

BQ25798EVM – BQ25798 evaluation module I²C controlled, 1- to 4-cell, 5-A buck-boost charger, dual input and MPPT

TI's Standard Terms and Conditions for Evaluation Items apply.

Technical documentation

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Type Title Date
* User guide BQ25792EVM, BQ25796EVM, and BQ25798EVM (BMS034) Evaluation Module (Rev. C) Jun. 15, 2021
Certificate BQ25798EVM EU Declaration of Conformity (DoC) Mar. 26, 2020

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