IS32LT3124A

Status Sample
Vdd(V) 5~42
Dimming PWM & BCM
Channels 4
Document
IOUT(mA) 150
Pkg-Pin(mm) eTSSOP-16
Sink Source Source
Product Family 32 = Automotive Analog and Mixed Signal
Part Number 3124 = 3124
Product Type LT = Lighting LED Driver
Package option blank = Tray or Tube

IS32LT3124A Features

  • 5.0V to 28V input supply voltage range
  • - Withstand 42V load dump the reliability, GENERAL DESCRIPTION The IS32LT3124 is a linear programmable current regulator consisting of 4 output channels capable of up to 150mA each. Individual external resistors set the maximum current level for each channel. The outputs can be combined to provide a higher current drive capability up to 600mA (Max.). The IS32LT3124 features Dynamic Headroom Control (DHC) with an optional external PMOS FET to minimize IC thermal stress when the supply voltage exceeds the LED string forward voltage. It includes two modes for different output power: Shunt Regulator mode and Series Regulator mode. It can operate with power supply modulation (PSM) for applications requiring dimming without use of the EN pin. For added system IS32LT3124 integrates fault detection circuitry for open/short circuit and over temperature conditions. The fault pins (FLTB) can all be tied together to disable the device and other IS32LT3124 devices on the same parallel circuit. To handle all these different fault detection and reporting features, the IS32LT3124 has six different versions: A, B, C, D, E and F. All of them can support the above features. See table 1 for the major difference. fault condition occurs, all output currents will be disabled. In IS32LT3124B/C/E/F, individual ISET pin for each LED channel is redefined as individual PWM dimming control, thus ISET open detection function is removed. The EN pin of IS32LT3124B/C/E/F is featured as the enable signal of the internal fault reporting block. See Table 4 for complete fault listing. The IS32LT3124 is targeted at the automotive market such as interior accent lighting and exterior tail lighting. It is offered in a thermally enhanced eTSSOP-16 package.
  • Automotive LED driver
  • RGBW automotive ambient lighting
  • Tail light
  • Turn light
  • Daytime running light IS32LT3124A/B/D/E, if any In
  • Four output channels can source up to 150mA each
  • - Four current set resistors - ±5% output current accuracy - Low dropout voltage of 1V (Max.) at 100mA - Combined for higher current capability with same current accuracy
  • PWM dimming and shutdown control input
  • - 100Hz~300Hz power supply modulation (PSM) - 100Hz~1kHz individual dimming via resistors of ISETx pins (IS32LT3124B/C/E/F only)
  • Optional Dynamic Headroom Control (DHC) with an external PMOS FET to minimize IC thermal stress
  • - Shunt regulator mode for heavy load - Series regulator mode for light load
  • Additional external UVLO (Under Voltage Lockout via EN pin is programmable Threshold) (IS32LT3124A/D only)
  • Fault protection and reporting all fault Fault output disables reporting condition
  • - Externally enable/disable (IS32LT3124B/C/E/F only) - Programmable fault reporting output delay time - (IS32LT3124A/B/D/E only) - Parallel fault connection (one-fail-all-fail) - LED string open/short - Single LED short (Conditional, IS32LT3124B/C/D only) - ISET pin short - ISET pin open (IS32LT3124A/D only) - Over temperature
  • AEC-Q100 Qualified

Overview

The IS32LT3124 is a linear programmable current regulator consisting of 4 output channels capable of up to 150mA each. Individual external resistors set the maximum current level for each channel. The outputs can be combined to provide a higher current drive capability up to 600mA (Max.). The IS32LT3124 features Dynamic Headroom Control (DHC) with an optional external PMOS FET to minimize IC thermal stress when the supply voltage exceeds the LED string forward voltage. It includes two modes for different output power: Shunt Regulator mode and Series Regulator mode. It can operate with power supply modulation (PSM) for applications requiring dimming without use of the EN pin. For added system IS32LT3124 integrates fault detection circuitry for open/short circuit and over temperature conditions. The fault pins (FLTB) can all be tied together to disable the device and other IS32LT3124 devices on the same parallel circuit. To handle all these different fault detection and reporting features, the IS32LT3124 has six different versions: A, B, C, D, E and F. All of them can support the above features. See table 1 for the major difference. fault condition occurs, all output currents will be disabled. In IS32LT3124B/C/E/F, individual ISET pin for each LED channel is redefined as individual PWM dimming control, thus ISET open detection function is removed. The EN pin of IS32LT3124B/C/E/F is featured as the enable signal of the internal fault reporting block. See Table 4 for complete fault listing. The IS32LT3124 is targeted at the automotive market such as interior accent lighting and exterior tail lighting. It is offered in a thermally enhanced eTSSOP-16 package. APPLICATIONS , Automotive LED driver , RGBW automotive ambient lighting , Tail light , Turn light , Daytime running light.

 

Related Part Number(s)

Description Stock Qty Available Qty Description Stock Qty Available Qty
IS32LT3124A-TR IS32LT3124D-ZLA3-TR
IS32LT3124 IS32LT3124DPSM
IS32LT3124A-ZLA3-TR IS32LT3124DPSM-TR
IS32LT3124APSM IS32LT3124E
IS32LT3124APSM-TR IS32LT3124E-TR
IS32LT3124B-ZLA3-TR IS32LT3124E-ZLA3-TR
IS32LT3124BPSM IS32LT3124EPSM
IS32LT3124BPSM-TR IS32LT3124EPSM-TR
IS32LT3124C-ZLA3-TR 80 IS32LT3124F
IS32LT3124CPSM IS32LT3124F-TR
IS32LT3124CPSM-TR IS32LT3124F-ZLA3-TR
IS32LT3124D IS32LT3124FPSM
IS32LT3124D-TR IS32LT3124FPSM-TR