One, Description

BC911 is a 3.5A lithium-ion battery charger. It features a 500 KHz synchronous降压converter topology to minimize power consumption during charging. The low power consumption, along with the internal MOSFET, allows for a physically smaller charger that can be embedded in a wide range of handheld applications. The BC911 includes a complete charging termination circuit, automatic charging, and ±1% 4.2V floating voltage. Parameters such as battery charging current, charging timeout, and charging completion indication are set by external components. Additional features include short-circuit cell detection, temperature-qualified charging, and overvoltage protection. The BC911 is available in ESOP8 and DFN10 packages.

Function

Input voltage range: 4V ~ 22V

Dynamic input current distribution for the maximum charging rate

3.5A charging current

No external MOSFETs or blocking diodes required.

Efficiency up to 95%

Constant current/voltage operation, thermal regulation, greatly enhances charging rate, no risk of overheating

Optional battery temperature monitoring, automatic sleep mode before and during charging, low power consumption

Overcurrent Protection

ESOP8 and DFN10 supported

Compliant with RoHS standards, lead-free (Pb)

Three, the application

Portable media player

Honeycomb and smart mobile phones

PDA / DSC

Handheld battery-powered equipment

PDA (Personal Digital Assistant)

Charging Dock and Cradle