UAA180

The UAA180 for driving 12 light emitting diodes. Corresponding to the input voltage, LEDS forming a light band are controlled similar to a thermometer scale. By using an appropriate  circuitry the brightness of the LEDs UAA180 can be varied and the light passage between two adjacent LEDs can be set between "smooth" and "abrupt".

The following is about the absolute maximum ratings of UAA180: (1)supply voltage: 18V; (2)input voltage: 6V; (3)junction temperature: 150; (4)storage temperature range: -40 to 125; (5)thermal resistance system-air: 78K/W.

The electrical characteristics of the UAA180 are: (1)current consumption: 5.5mA typ and 8.2 mA max; (2)input currents: 0.3A typ and 1A max; (3)voltage difference for smooth light transition: 1.0V min; (4)voltage difference for abrupt light transition: 4.0V min; (5)diode current per diode: 10mA typ; (6)tolerance of LED forward voltages: 1.0V max.