Three new
SWITCH-mode standalone battery charger ICs have been launched, by
Texas Instruments (TI), for lithium-based battery-powered applications with
a 5V to 28V inputs.
The devices provide highly-accurate and efficient charging in a small
package for mass market applications, such as industrial handhelds, mobile
Internet devices (MIDs), netbooks, power tools and portable medical devices.
The devices offer a constant-frequency synchronous switching pulse-width
modulation (PWM) controller with highly accurate charge current and voltage
regulation, charge pre-conditioning, termination, adapter current regulation
and charge status monitoring. The battery is charged in three phases:
pre-conditioning, constant-current and constant-voltage. A programmable
charge timer provides a safety backup.
Key features and benefits include - Higher
EFFICIENCY results in less heat
dissipation than other solutions - Greater than 99 percent charge voltage
and current accuracy optimize battery life cycle - Integrated, standalone
solution enhances design flexibility and reduces overall solution size -
Dynamic power management maximizes use of adapter power to power the system
while charging the battery.
The bq24610 and bq24617 are available in a 24-pin 4 x 4mm2 QFN package. The
bq24600 is available in a 16-pin 3.5 x 3.5mm2 QFN package, says the company.
