ICL828 Datasheet (Intersil Corporation) - Switched-Capacitor Voltage Inverter

ICL828, Switched-Capacitor Voltage Inverter

The ICL828 contains all the necessary circuitry to complete a negative converter, utilizing two external inexpensive 10µF polarized electrolytic capacitor.

The mode of operation of the device may be understood by considering Figure 10 which shows an idealized negative voltage converter.

Capacitor C1

www.DataSheet4U.com ICL828 TM Data Sheet June 2000 File Number 4835.1 Switched-Capacitor Voltage Inverter The ICL828 IC performs supply voltage conversions from positive to negative for an input range of +1.5V to +5.5V resulting in complementary output voltages of -1.5V to -5.5V.

The ICL828 has a 12kHz internal oscillator and requires two capacitors to invert the supply voltage.

Cascading may be made to increase the output voltage.

The high efﬁciency (greater than 90% over most of the load