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