资 源 简 介
The MAX712/MAX713 fast-charge Nickel Metal Hydride(NiMH) and Nickel Cadmium (NiCd) batteries from a DCsource at least 1.5V higher than the maximum batteryvoltage. 1 to 16 series cells can be charged at rates upto 4C. A voltage-slope detecTIng analog-to-digital converter,TImer, and temperature window comparator determinecharge compleTIon. The MAX712/MAX713 are poweredby the DC source via an on-board +5V shunt regulator.They draw a maximum of 5μA from the battery when notcharging. A low-side current-sense resistor allows thebattery charge current to be regulated while sTIllsupplying power to the battery’s load.The MAX712 terminates fast charge by detecting zerovoltage slope, while the MAX713 uses a negativevoltage-slope detection scheme. Both parts come in 16-pin DIP and SO packages. An external power PNP transistor,blocking diode, three resistors, and threecapacitors are the only required external components.For high-power charging requirements, the MAX712/MAX713 can be configured as a switch-mode batterycharger that minimizes power dissipation. Two evaluationkits are available: Order the MAX712EVKIT-DIP for quickevaluation of the linear charger, and the MAX713EVKITSOto evaluate the switch-mode charger.________________________ApplicationsBattery-Powered EquipmentLaptop, Notebook, and Palmtop ComputersHandy-TerminalsCellular PhonesPortable Consumer ProductsPortable StereosCordless Phones
