Charger IC Lithium Ion 16-VQFN (3x3)
The BQ24075RGTR is a standalone linear charger and power-path management integrated circuit developed by Texas Instruments for single-cell lithium-ion and lithium-polymer battery applications. The device is designed for portable and space-constrained electronic systems requiring efficient battery charging, USB compatibility, and simultaneous system power delivery.
The integrated dynamic power-path management architecture enables the system load to be powered while independently charging the battery. The charger supports operation from either a USB power source or an external adapter and includes programmable charging and input current limiting functions for optimized power management.
The device incorporates multiple protection and monitoring features including thermal regulation, overvoltage protection, reverse current protection, battery temperature monitoring, and safety timers. The BQ24075RGTR also provides battery disconnect capability through the SYSOFF control function, making it suitable for low-power and portable embedded designs.
Typical applications include portable consumer electronics, handheld instruments, wearable devices, wireless accessories, battery-powered IoT equipment, medical portable systems, and embedded rechargeable products.
Device Features
Standalone single-cell lithium-ion and lithium-polymer battery charger
Integrated power-path management architecture
Simultaneous battery charging and system power support
USB-compatible input current limiting
Programmable fast-charge current capability
Dynamic power management for unstable or limited input sources
Battery temperature monitoring through external thermistor input
Integrated thermal regulation and protection mechanisms
Reverse current, short-circuit, and input overvoltage protection
Programmable safety timers for pre-charge and fast-charge modes
Charging status and power-good indication outputs
Battery disconnect functionality through SYSOFF control
Compact surface-mount VQFN package implementation
Electrical Characteristics
Designed for single-cell lithium-ion or lithium-polymer batteries
Fixed battery regulation voltage suitable for standard single-cell charging
Supports USB and external adapter input operation
Linear charging topology
Wide operating temperature range for portable and industrial applications
Programmable input current limit for USB compliance and adapter compatibility
Package Information
Package Type: VQFN
Pin Configuration: Sixteen-pin package
Mounting Style: Surface mount
Package Dimensions: Compact three-millimeter square footprint
Functional Overview
The BQ24075RGTR manages power distribution between the external input source, the system load, and the rechargeable battery. When external power is present, the device prioritizes powering the system while charging the battery according to programmable charging parameters. Dynamic power management prevents excessive loading of weak USB or adapter sources by automatically reducing charging current when necessary.
Thermal regulation circuitry continuously monitors device temperature and adjusts charging operation to maintain safe operating conditions. Additional integrated protection functions ensure reliable operation during fault conditions such as input overvoltage, battery temperature abnormalities, reverse current flow, and output short circuits.