OVERVIEW

The SM6780AS is a quick charge control IC for Nickel-Cadmium (Ni-Cd) and Nickel Metal Hydride (Ni-MH) rechargeable batteries. It supports quick charge, supplemental and pulse trickle charging modes. The charging mode is selected automatically in response to the battery voltage, temperature and charging time.

FEATURES

■ Ni-Cd/Ni-MH battery quick charge control

■ −∆V, ∆T/∆t, and maximum charge time cutoffs

■ 3 charge modes (quick charge, supplemental, pulse trickle charge)

■ 3 selectable charge times (80, 120, and 240 minutes)

■ Charge condition LED indicator output (on, pulsed, off)

■ Low power dissipation mode

■ 4.0 to 5.5V operating supply voltage

■ 300sec (typ) −∆V detection invalid time

■ 8mV (typ) −∆V detection accuracy

■ 25mV/min (typ) ∆T/∆t detection accuracy

■ 8-pin SOP package