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Datasheet MAX1647 - Chemistry-Independent Battery Chargers - Maxim Integrated Products

19-1158; Rev 0; 12/96

Chemistry-Independent

Battery Chargers

_______________General Description

____________________________Features

The MAX1647/MAX1648 provide the power control neces-sary to charge batteries of any chemistry. In the MAX1647,oCharges Any Battery Chemistry: all charging functions are controlled via the Intel SystemLi-Ion, NiCd, NiMH, Lead Acid, etc.

Management Bus (SMBus ) interface. The SMBus 2-wireoIntel SMBus 2-Wire Serial Interface (MAX1647)serial interface sets the charge voltage and current, andprovides thermal status information. The MAX1647 func-oIntel/Duracell Level 2 Smart Battery Complianttions as a level 2 charger, compliant with the Duracell/Intel(MAX1647)Smart Battery Charger Specification. The MAX1648 omitso4A, 2A, or 1A Maximum Battery-Charge Currentthe SMBus serial interface, and instead sets the chargevoltage and current proportional to the voltage applied too11-Bit Control of Charge Currentexternal control pins.

oUp to 18V Battery VoltageIn addition to the feature set required for a level 2 charger,the MAX1647 generates interrupts to signal the host wheno10-Bit Control of Voltage

power is applied to the charger or a battery is installed oro±0.75% Voltage Accuracy with External ±0.1%removed. Additional status bits allow the host to checkReferencewhether the charger has enough input voltage, andwhether the voltage on or current into the battery is beingoUp to 28V Input Voltage

regulated. This allows the host to determine when lithium-oBattery Thermistor Fail-Safe Protection

ion batteries have completed charge without interrogatingthe battery.

The MAX1647 is available in a 20-pin SSOP with a 2mmprofile height. The MAX1648 is available in a 16-pin SOpackage.

______________Ordering Information

________________________Applications

Notebook ComputersPersonal Digital AssistantsCharger Base StationsPhones

__________________________________________________________Pin Configurations

SMBus is a trademark of Intel Corp.

________________________________________________________________Maxim Integrated Products

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MAX1647/MAX1648