General Description

The HT7470 is a 4-bit single-chip microcomputer specially designed for NiCd battery fast charge/discharge control. The advanced unique design and multiple protection features of the HT7470 eliminate excessive external components in application circuits, and ensure battery safety and high performance.

Features

• Fast charge NiCd battery

• High resolution -∆V detector to determine peak charging voltage

• Auto cutoff for defective battery

• Fast charge from C/2 to 4C rate

• C/10 trickle charge rate

• Adjustable thermo protection

• Built-in safety timer

• Direct drive LED display and alarm buzzer

• Automatic switching from fast to trickle charge

• Warm up option for battery

• Maximum voltage protection

• Auto-start function

• 12-bit A/D converter