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Battery charger ICs

BQ25638

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I²C controlled, 1-cell 5-A maximum 18-V input buck charger with NVDC power path and USB OTG output

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BQ25638

ACTIVE
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Product details

Rating Catalog Number of series cells 1 Cell chemistry Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 Charge current (max) (A) 5 Features BAT temp thermistor monitoring (JEITA profile), IC thermal regulation, IINDPM (Input current limit), Input OVP, Integrated ADC, Integrated LDO, Power Path, USB C/PD compatible, USB OTG integrated, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 3.9 Vin (max) (V) 18 Absolute max Vin (max) (V) 26 Control topology Switch-Mode Buck Battery charge voltage (min) (V) 3.5 Battery charge voltage (max) (V) 4.8 Control interface I2C Operating temperature range (°C) -40 to 85
Rating Catalog Number of series cells 1 Cell chemistry Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 Charge current (max) (A) 5 Features BAT temp thermistor monitoring (JEITA profile), IC thermal regulation, IINDPM (Input current limit), Input OVP, Integrated ADC, Integrated LDO, Power Path, USB C/PD compatible, USB OTG integrated, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 3.9 Vin (max) (V) 18 Absolute max Vin (max) (V) 26 Control topology Switch-Mode Buck Battery charge voltage (min) (V) 3.5 Battery charge voltage (max) (V) 4.8 Control interface I2C Operating temperature range (°C) -40 to 85
DSBGA (YBG) 30 5.46 mm² 2.6 x 2.1
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Technical documentation

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Top documentation Type Title Format options Date
Application note Single Cell Battery Charger Applications with Dual Sources PDF | HTML 11 Aug 2025
Application brief Battery Detection Using Single Cell Charger (Rev. A) PDF | HTML 20 Jun 2025
Application note Solar MPPT with Single Cell Battery Charger PDF | HTML 16 Oct 2024
White paper 解決 Nano IQ 系統的性能挑戰 (Rev. A) PDF | HTML 25 Mar 2024
White paper 나노-IQ 시스템의 성능 문제 해결 (Rev. A) PDF | HTML 25 Mar 2024
White paper Addressing Performance Challenges in Nano-IQ Systems (Rev. A) PDF | HTML 11 Mar 2024
Certificate BQ25638EVM EU Declaration of Conformity (DoC) 26 Sep 2023

Design & development

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Evaluation board

BQ25638EVM — BQ25638 evaluation module for single-cell 5-A buck battery charger with NVDC power path management

<p>The BQ25638 evaluation module (EVM) is a complete charger module for evaluating the BQ25638 5.0-A, up to 18-V input, I²C-controlled single-cell (1S) NVDC charger.</p>

User guide: PDF | HTML
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Reference designs

PMP23456 — USB Type-C® and USB power delivery for 1S Li-Ion battery charger reference design

This reference design uses a TPS25730S sink-only USB Type-C® power delivery (PD) controller in collaboration with a BQ25638 interintegrated circuit (I2C) controlled single-cell buck charger configured as a USB Type-C single-cell battery charger design targeted at portable personal electronic (...)
Test report: PDF
Package Pins CAD symbols, footprints & 3D models
DSBGA (YBG) 30 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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