Battery-charger controller
VISHAY
to pulse charge 1-cell to 3-cell NiCd/NiMH or 1-cell Li-ion
batteries. Battery charging is accomplished under direct
control from the system processor. An internal low RDS(on)
MOSFET can be pulsed on and off at varying duty cycle by
the system processor to pulse charge the battery at high
charge current while minimizing heat dissipation. Provision is
also made to trickle charge a discharged battery until the
battery is charged to a high enough voltage to wake up the
processor so that the processor can take control of the
charging process. For charging Li-ion batteries, Si9731
includes a precision voltage reference and an error amplifier
for constant voltage (CV) charge mode. The Si9731 is
available in lead (Pb)-free TSSOP-16 package and is
classified over the industrial temperature range (- 40 °C to
85 °C).
-
zoom
