DESCRIPTION

The SC1766 fast charge controller IC is designed for intelligent charging of NiMH or NiCd batteries without overcharging. It detects a voltage drop (-∆V) occurring in the final stage of a fast charging cycle and correspondingly controls the charging current. Fast charge can also be cut off by a peak voltage timer (0∆V).

FEATURES

• Reliable fast charge control of NiMH/NiCd batteries

• Fast charge termination by:

1 Accurate -∆V detection level -0.25 with respect to peak value

2 Peak voltage timer (0∆V)

• Adjustable fast charge safety timer

• Protection against temperature fault

• Protection against short-circuited and open batteries

• Wide operation voltage range of 9V to 18V, no extra regulator needed

• Large battery voltage detection range of 0.65V to 3.7V

• LED drivers to indicate charge status or fault conditions

• Voltage reference output

• Quick and easy testing for production

• Space saving 8-pin and 14-pin SO packages

APPLICATIONS

Battery chargers for:

• Mobile phones

• Notebook and laptop personal computers

• Portable power tools and toys

• Portable communications equipment

• Portable video and stereo equipment