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712 / MAX712CPE / MAX712 / maxim controller


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712 / MAX712CPE / MAX712 / maxim controller

NiCd/NiMH Battery Fast-Charge Controllers
They draw a maximum of 5µA from the battery when not charging. A low-side current-sense resistor allows the battery charge current to be regulated while still supplying power to the battery’s load.
The MAX712 terminates fast charge by detecting zero voltage slope, while the MAX713 uses a negative voltage-slope detection scheme. Both parts come in 16-pin DIP and SO packages. An external power PNP transistor, blocking diode, three resistors, and three capacitors are the only required external components.
For high-power charging requirements, the MAX712/MAX713 can be configured as a switch-mode battery charger that minimizes power dissipation. Two evaluation kits are available: Order the MAX712EVKIT-DIP for quick evaluation of the linear charger, and the MAX713EVKITSO to evaluate the switch-mode charger.
________________________Applications
Laptop, Notebook, and Palmtop Computers
Fast-Charge NiMH or NiCd Batteries
Voltage Slope, Temperature, and Timer Fast-Charge Cutoff
Supply Battery’s Load While Charging (Linear Mode)
Fast Charge from C/4 to 4C Rate
Automatically Switch from Fast to Trickle Charge
Linear or Switch-Mode Power Control
5µA (max) Drain on Battery when Not Charging
5V Shunt Regulator Powers External Logic
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712 / MAX712CPE / MAX712 / maxim controller