General Description

The CL320 is designed to drive 3 strings of LEDs at a constant current of 20mA.

Other drivers with currents in the range of 20 - 30mA are available. The drive current is fi xed, with a ±6 tolerance over a VOUT range of 4 - 15V.

Separate enable pins for each channel allow for PWM dimming, 3-step linear dimming, or individual disconnection of faulty LED strings.

Over-temperature protection circuitry shuts down all 3 channels when the nominal die temperature reaches 135°C. Normal operation resumes when the die temperature drops by 30°C.

The CL320 is available in the 8-Lead SOIC (w/Heat Slug) package and requires a single ceramic bypass capacitor which may be shared among several drivers.

Features

► ±6 current accuracy @ 4.0 -15V

► 90V standoff voltage

► Separate enable pins for each channel allow for PWM dimming

► Over-temperature protection

► 8-Lead SOIC (w/Heat Slug) package

Applications

► LCD backlighting

► Indicator lamps