Power Electronics / Power Management


Linear charger for Li-Ion batteries

23 November 2022 Power Electronics / Power Management

The BQ25175 from Texas Instruments is an integrated 800-mA linear charger for 1-cell Li-Ion and Li-Poly batteries. The device has a single power output to charge the battery. The system load can be placed in parallel with the battery provided that the average system load does not prevent the battery from charging fully within the safety timer duration. When the system load is placed in parallel with the battery, the charge current is shared between the system and the battery.

The device has three phases for charging a Li-Ion/Li-Poly battery: pre-charge to recover a fully discharged battery, fast-charge constant current to supply the bulk of the charge, and voltage regulation to reach full capacity. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold is exceeded.

The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and automatic charge termination. The fast-charge current is programmable through an external resistor. The pre-charge and termination current thresholds track the fast charge current setting.


Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Microchip expands its mSiC solutions
EBV Electrolink Power Electronics / Power Management
The highly integrated 3,3 kV XIFM plug-and-play digital gate driver is designed to work out-of-the-box with high-voltage SiC-based power modules to simplify and speed system integration.

Read more...
Dual-port USB-C power delivery solution
Altron Arrow Power Electronics / Power Management
Infineon’s CYPD7272-68LQXQ is the tray packing option of the company’s dual-port USB-C power delivery solution and features an integrated dual-port USB-C PD + DC-DC controller.

Read more...
Improved precision laser marking
RS South Africa Manufacturing / Production Technology, Hardware & Services
On-the-fly marking at high speeds is only one of the comprehensive features of Panasonic’s new LP-RH laser marker series.

Read more...
Parallel redundancy power module
Conical Technologies Power Electronics / Power Management
The LIR40-40 is a wide input range DC-DC module, with a constant output of 48 V at a nominal output current of up to 40 A.

Read more...
Motor protection relay front-end
NewElec Pretoria Power Electronics / Power Management
Newelec’s Motor Protection Relay front-end software isn’t just another tool, it’s a game changer that puts control firmly in your hands.

Read more...
High-power three-phase supplies
Current Automation Power Electronics / Power Management
The units from Meanwell can either be supplied with a three-phase three-wire delta input of 196 to 305 V AC, or they can use a three-phase four-wire star connection of 340 to 530 V AC.

Read more...
Make your small asset tracker last longer
Altron Arrow Editor's Choice Power Electronics / Power Management
This design solution reviews a typical asset tracking solution, and shows how the MAX3864x nanopower buck converter family, with its high efficiency and small size, enables longer battery life in small portables.

Read more...
Local procurement should be top of mind in mine-owned solar power projects
Power Electronics / Power Management
Recent changes in government legislation have enabled businesses to develop up to 100 MW energy plants with very little red tape.

Read more...
The next big shift in SA's energy infrastructure
Power Electronics / Power Management
High-voltage (HV) LiFePO4 battery energy storage systems, commonly referred to as BESS, which drastically improve the power reliability prospects for businesses, have been around for some time, but expect to see a massive surge in 2024.

Read more...
Multi-channel electronic load series
Conical Technologies Power Electronics / Power Management
ITECH has recently announced the release of their upgraded IT8700P+ series multi-channel electronic loads. This new series supports master-slave parallel configuration between all the modules, allowing for different modules to be mixed and matched for synchronisation.

Read more...