IS32LT3180

IS32LT3180 DUAL INTENSITY, LINEAR CURRENT DRIVER FOR RCL Preliminary Information December 2014 GENERAL DESCRIPTION The IS32LT3180 is an eight channel linear current regulator for automotive rear tail light applications such as RCL (Rear Combination Lamps) and CHMSL (Center High Mounted Stop Lamps). It is fully programmable with two LED brightness levels for the different intensity requirements of “stop” bright (DC mode) and “tail” dim (PWM mode). A logic level at the PWM pin is used to select between the tail and stop output conditions. The stop condition provides the highest intensity output, while the tail condition utilizes an internally generated PWM signal to reduce the intensity of the LEDs’ light output. The sink current at the OUTx pins is easily set with a single resistor at the STOP pin. A second resistor at the TAIL pin sets the duty cycle of the internal PWM oscillator for dimming (less bright) the LED output when operating in the tail condition. An external FET (optional) can be implemented for operation with wide varying supply voltages. The IS32LT3180 is offered in an eTSSOP-16 package. FEATURES  Output current programmable from 10mA to 75mA  Tail duty cycle programmable from 1% to 95%  Linear voltage regulator to optimize consumption on device  Low dropout voltage of 0.8V@35mA  Slew rate control on each output for better EMI performance  PWM logic level input selects between full brightness and PWM dimming levels  FAULT reporting  LED open/short cir...