BQ25892RTWR

Series:	MaxCharge™
Packaging:	Tape & Reel (TR)
Part Status:	Active
Battery Chemistry:	Lithium-Ion/Polymer
Number of Cells:	1
Current - Charging:	--
Programmable Features:	--
Fault Protection:	Over Current, Over Temperature
Charge Current - Max:	5A
Battery Pack Voltage:	--
Voltage - Supply (Max):	14V
Interface:	I²C, USB
Operating Temperature:	-40°C ~ 85°C (TA)
Package / Case:	24-WFQFN Exposed Pad
Supplier Device Package:	24-WQFN (4x4)

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What is BQ25892RTWR PMIC - Battery Charger?

The BQ25892RTWR PMIC – battery charger is a highly integrated linear charger controller for single cell Li-ion and Li-polymer batteries. It offers charge current up to 1800mA with adjustable range for different battery types. It has a high-accuracy sense resistor and input current limit, adjustable charge current limit and charge termination current threshold, adjustable float voltage and thermal regulation.

Use Cases and Application Fields of BQ25892RTWR

The BQ25892RTWR can be used in a wide range of applications, such as industrial control, medical equipment, automotive power systems, and consumer electronics. It is suitable for single-cell battery charging applications in a host system. It supports output voltages up to 20V and charge current up to 1800mA. It would be a perfect choice for applications that require a high level of flexibility, accuracy and reliability.

BQ25892RTWR Operational Features

The BQ25892RTWR has several configurable parameters, such as:

• Input over-voltage protection (OVP),
• Input under-voltage protection (UVP),
• Input current limit (ICL)
• Thermal regulation protection,
• Constant voltage (CV) and constant current (CC) charge profiles
• Charge termination based on current and/or timer,
• Charge status monitoring with LED output.

It also features integrated device protection, internal control loop compensation, anti-blocking timer, and thermal regulation to provide the best performance and reliability.

Working Principle of BQ25892RTWR

The BQ25892RTWR power path and charging controller operates using a constant-voltage (CV) and constant-current (CC) charging profile. It provides seamless charging without interruption while maintaining safety standards.The device operates in a four-step charging cycle: pre-charge, CV, CC and terminating charge. During pre-charge, the controller uses a programmable current limit which can be set up to enable the device to select a safe-charging level for the battery. In the CV charge stage, the maximum voltage is set and maintained by the controller. As the battery reaches the appropriate voltage level, the controller switches the regulator mode to constant current and the current limit is adjusted to safely charge the battery.The BQ25892RTWR charging controller can monitor the battery’s charge status and terminate the charge cycle when the battery is fully charged. It also has an internal thermal monitoring function for temperature protection, which allows it to adjust the charge current to ensure timely charging and protect the battery from becoming overcharged. Additionally, it has internal protection circuits to protect against fault conditions such as input over-voltage, under-voltage and over-temperature.

Conclusion

The BQ25892RTWR PMIC – battery charger is an integrated linear charger controller for single cell Li-ion and Li-polymer batteries; it has a high-accuracy sense resistor, adjustable charge current limit and charge termination current threshold, adjustable float voltage and thermal regulation. It is perfect for industrial control, medical equipment, automotive power systems, and consumer electronics. It has several operational features, including four-step charging, pre-charge, current limit, thermal regulation and charge termination, allowing it to be used seamlessly with high efficiency and reliability.

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