SAA1501T

General description

The SAA1501T is intended to be used as a battery monitor and charge current control circuit in rechargeable battery systems.

The SAA1501T is processed in BiCMOS technology where the benefits of mixed bipolar and CMOS technology is fully utilized to achieve high accuracy measurements and digital signal processing in the same device. The general function of the integrated circuit is a Coulomb counter. During battery charging, the charge current and charge time are registered in a Coulomb counter. During discharge, the discharge current and time are recorded. The momentary charge amount of the batteries can be displayed either on an LCD screen or on an LED bargraph. Using the SAA1501T, intelligent batteries or intelligent battery powered systems can be easily designed with only a few external components.

Features

• High level of integration to allow assembly in intelligent battery packs
• Accurate charge and discharge account
• Large dynamic range of charge and discharge currents
• Independent settings of charge and discharge efficiency
• 2 V minimum supply voltage (2 cell operation)
• Temperature protection of batteries during charging
• Temperature controlled self-discharge
• Accurate charge current regulation
• Two charge amount display modes, LCD and LED.

Applications

• Cellular radio
• Mobile communications
• High performance cordless telephones
• 2-way radio

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Disclaimers

• General product disclaimer
• Quality and reliability disclaimer