|IC代碼||3181 = 3181|
|產品系列||32 = Automotive Analog and Mixed Signal|
|產品類別||LT = Lighting LED Driver|
|腳位/封裝||Z = TSSOP|
|焊料類型||L = Lead-free (RoHS Compliant)|
|Temperature Grade||A3 = Automotive temp. (-40°C to 125°C)|
|包裝選項||blank = Tray or Tube|
The IS32LT3181 is a six 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. An active low fault output signal reports a device error condition. The FAULTB pin of several devices can be tied together to disable all the output stages when a fault is detected by any one of the devices. The sink current at the OUTx pins is easily set with a single resistor at the STOP pin. The constant-current sink outputs can be combined in parallel to create higher current-driving capability on a single string. A second resistor at the TAIL pin sets the duty cycle of the internal PWM oscillator for dimming the LED output when operating in the tail condition. An external FET (optional) can be implemented for operation with wide varying supply voltages to minimize device thermal dissipation. The IS32LT3181 is offered in an eTSSOP-16 package.