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The AL5873 is a three-channel linear LED driver with PWM dimming and analog dimming control. Each channel can drive up to 250mA with a total driving current up to 750mA. The LED channel current of the AL5873 can be set through two reference resistors connected to the REF1 and REF2 pins. The AL5873 regulates LED current for each channel, accurate down to ±4%, with excellent dimming performance. The AL5873 enters standby mode to save power if no PWM signal is detected. The AL5873 monitors the temperature and reduces the LED current if the chip temperature exceeds the threshold temperature. Moreover, the input under voltage lock-out (UVLO), LED string open/short protection, over temperature protection (OTP), and fault indicator (FAULTB) are designed to improve system robustness. The AL5873 is available in TSSOP-16EP (Type DX) package.


  • Wide Input Voltage Range from 5V to 55V
  • Each Channel up to 250mA Current Capability
  • Set Stop and Tail Current Independently Through Two Resistors
  • Switch LED Current Between Stop and Tail Function
    Automatically via FULL Input
  • PWM Dimming via Both PWM Input and Power Supply
  • Analog Dimming via ADIM Input
  • Automatically Enter and Exit Standby Mode Without Enable Pin


  • Automotive aftermarket LED inner lamps
  • Aftermarket rear lights – tail and stop lights, rear turn indicators,
    parking lights, fog lights, reverse lights

Product Specifications

Product Parameters

AEC Qualified No
Compliance (Only Automotive supports PPAP) Standard
Topology Linear LED Driver
Minimum Supply Voltage (V) 5 V
Maximum Supply Voltage (V) 55 V
Maximum VOUT (V) 55 V
Number of Channels 3
Output Current (A) 250 mA
Channel Max. Output Current (mA) 250 mA
Accuracy (%) 4 %
Dimming Analog and PWM
Temperature Range (°C) -40 to 125 °C

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