IS32LT3146
DESCRIPTION
The IS32LT3146 device is a six-channel linear LED driver with a power resistor to shunt the power dissipation to optimize the thermal stress on the device. It supports both sequential turn on mode and traditional blink mode for turn signal light application. A logic level at the SEQEN pin is used to switch between these two modes. The startup delay time and channel to channel internal delay time of the sequential turn on are fully programmable by external resistors, and microcontroller is not required. The sequential turn on mode is able to implement multiple devices synchronization operation to realize more than 6 LED strings sequential turn on. A single resistor from the SEQMODE pin to GND selects sequential turn on styles: one channel by one channel, two channels by two channels, three channels by three channels or all channels simultaneous on.
For added system reliability, the IS32LT3146 integrates fault detection circuitry for LED open/short circuit, single LED short...
