Description:High-efficiency 5-A, 1.5-MHz, synchronous switch
mode buck charger for single cell battery
– >90% efficiency down to 10-mA output current
from 5-V input
– Charge current up to 5 A in 80-mA steps
– Charge termination from 30 to 1000 mA in 10-
mA steps
– Flexible JEITA profile for safe charging over
temperature
• BATFET control to support shutdown and full
system reset
Texas Instruments provides a recommended layout and placement guide in the application note SLUA645, which includes guidelines for component placement, routing, and thermal management to ensure optimal performance and minimize noise.
The BQ25638YBGR has a programmable charging profile, and Texas Instruments provides a charging profile optimization tool, the BQ25638 Charging Profile Optimization Tool, which helps engineers optimize the charging profile for their specific battery chemistry and capacity.
The BQ25638YBGR has an operating ambient temperature range of -40°C to 85°C, but it's recommended to derate the device's performance at high temperatures. Consult the datasheet and application notes for more information on thermal management and derating.
The BQ25638YBGR is optimized for Li-Ion batteries, but it can be used with other battery chemistries such as Li-Polymer, Li-FePO4, and NiMH. However, the charging profile and settings may need to be adjusted, and the device's performance may vary. Consult the datasheet and application notes for more information.
The BQ25638YBGR has a built-in OVP feature, but it requires an external voltage sensing resistor and a voltage supervisor IC. Texas Instruments provides an application note, SLUA644, which provides a detailed design example and guidelines for implementing OVP with the BQ25638YBGR.
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BQ25638YBGR Overview
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
