Switchmode Single-Cell/Two-Cell Li-ion/Li Polymer Battery ChargerOutline
HB6298B is an integrated 1-cell/2-cell
Li-ion/Li polymer switch-mode charge management
device, targeted at a wide range of portable
applications. HB6298B offers integrated power FET,
high-accuracy current and voltage regulation,
charge preconditioning, charge status, and charge
termination, in a small TSSOP20 or QFN20 package.
HB6298B charges the battary in three phase:
preconditioning, constant current(CC), and
constant voltage(CV). The charge current is
programmable with an external resistor up to
1.5A. HB6298B features cycle-by-cycle current
limit, charge current thermal foldback and short
circuit protection to guarantee safe operation.
Additional features include NTC thermistor
interface to monitor the battery temperature.
Features
● High conversion efficiency charger for
1-cell/2-cell Li-ion/Li polymer battery
● 0.5% voltage accuracy
● Full charged voltage trimming by external
resistors
● Build-in battery detection
● Integrated power MOSFET
● Soft starting
● 400kHz PWM Oscillator frequency
● Programmable charge current up to 1.5A
● NTC Thermistor interface for battery
temperature monitor
● Status outputs for LED
● Cycle-by-cycle current limit, charge
current thermal fold-back , short circuit
protection
● 18V absolute maximum voltage rating on IN
pins
● Ambient temperature range: -20℃～70℃
● Both TSSOP-20 and QFN-20 package available
Application
● Handheld devices, include medical
handhelds
● Portable-DVD,PDA,cell phones and smart
phones
● Portable instruments
● Self-charging battery packs
● Stand-alone chargers
