IS32LT3143
DESCRIPTION
The IS32LT3143 device is a linear programmable LED driver consisting of three current source output channels capable of up to 150m A each. It supports individual PWM dimming control to each channel. A single resistor sets the maximum current level for all channels. The output channels can be bined to provide a higher current drive capability up to maximum 450m A.
For added system reliability, the IS32LT3143 integrates fault detection circuitry for LED string open/short, single LED short, current setting resistor open/short, programmable device junction over temperature thermal roll-off and shutdown conditions. Two dedicated fault reporting pins, FAULTB and FAULTS, are able to report fault conditions; the FAULTS pin is dedicated to reporting LED short fault. The fault reporting pins can all be tied together to disable the device and other IS32LT3143 devices on the same parallel circuit to achieve a “one-fail-all-fail” function.
The IS32LT3143 is targeted at the automotive...
