The PT8A2704/04A Fast-Charger IC is low-cost CMOS battery-charge controller providing reliable charge termination for both NiCd and NiMH battery applications, such as Power tool and Consumer electronics. A current-limited or constant–current supply allows the PT8A2704/04A to be a cost-effective charger with only a few external components. The PT8A2704/04A has programmable charging time and programmable trickle charging rate control by options in a single IC for charging NiCd or NiMH battery cells. For safety, fast or trickle charging is inhibited if the battery temperature is over a safety threshold. Fast charge is terminated by any of the following:Negative delta voltage/zero delta voltageMaximum voltageMaximum temperatureMaximum time
Feature
- Fast charge of nickel cadmium (NiCd) or nickel metal hydride (NiMH) batteries
- Fast-charge termination by negative delta voltage, maximum voltage, maximum temperature, and 90 minutes charging time
- Support 1 to 8 cells fast charging
- 10% (PT8A2704) or 4% (PT8A2704A) of constant charging current for trickle charging
- On-chip 2.0V regulator
- On chip precise ADC
- Internal RC oscillator with external R&C components
- Low cost 8-pin DIP/SOIC package
Applications
- Rechargeable shavers and hair cutters
- Rechargeable RC cars
- Rechargeable power tools
