I2C 5-A, 1-4 cell buck-boost charger with dual-input and USB PD 3.0 OTG output evaluation module


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The BQ25790EVM evaluation module (EVM) is a fully assembled and tested circuit for evaluating the BQ25790 device. The BQ25790 is an integrated switched-mode buck-boost battery charge management device intended for 1-series to 4-series cell li-ion and li-polymer batteries. The charger features a narrow VDC architecture (NVDC) which allows the system to be regulated to a minimum value even if the battery is completely discharged. With USB input source detection, dual input source selection, USB OTG support, and an integrated 16-bit multi-channel analog-to-digital converter (ADC), the BQ25790 is a complete charging solution.

  • Synchronous switch mode buck-boost charger for 1s~4s battery configuration for 5-A charging with 10-mA resolution
  • Support for 3.6-V to 24-V wide range of input sources with MPPT, USB auto-detect, USB PD and wireless input
  • Dual input source selector to drive bi-directional blocking NFETs
  • Power-up USB port from battery (USB OTG) with 2.8-V to 22-V OTG output voltage with 10-mV resolution
  • Low battery quiescent current with <5 µA at battery only operation and <1 µA in charger shutdown mode
  • This circuit design is tested and includes GUI and user's guide
Battery charger ICs
BQ24179 Integrated, NVDC, 5-A 1-cell to 4-cell switch-mode buck-boost battery charger BQ25790 Integrated, NVDC, 5-A 1-cell to 4-cell switch-mode buck-boost battery charger


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

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Evaluation board

BQ25790EVM – I2C controlled 5-A, 1-4 cell buck-boost charger with dual-input selector and USB PD 3.0 OTG output evaluation module

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

Technical documentation

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Type Title Date
* User guide BQ25790EVM (BMS027) Evaluation Module User's Guide (Rev. A) Jul. 08, 2020
Data sheet BQ25790 I2C Controlled, 1-4 Cell, 5-A Buck-Boost Battery Charger with Dual-Input datasheet Jun. 03, 2020
Certificate BQ25790EVM EU Declaration of Conformity (DoC) Apr. 28, 2020

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