A LED driver IC with constant current and temperature compensation

A LED driver IC with constant current and temperature compensation is presented. The IC is trimmed to provide constant current of 20mA±5% at an input voltage of 6.0–90V. The IC can be used as a two terminal constant current source or constant current sink. And the current is well compensated, at the temperature range of −20 °C ∼100°C,the temperature coefficient is 18ppm/°C when input voltage is 40V.All the temperature coefficients at all input voltage range are below 80 ppm/°C. The IC is design with SOI technology.