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Triple-Channel Current-Ratio-Optimized LED Driver with Analog and PWM Dimming

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The AL1793, a triple-channel LED driver with analog and PWM dimming control, is targeted for Tunable White/Color Smart Lighting application. It serves as the LED driving element along with AC-DC Power Conversion Block and Intelligent MCU as emerging smart light bulb configuration. The key merits attribute to cost-effectiveness, dimming performance, low standby power, ease of system implementation, and great scalability.


  • Tunable Color Smart LED Light Bulbs 
  • Tunable White Smart LED Light Bulbs
  • Dimmable Smart LED Light Bulbs
  • LED Power Supply
  • Smart Lighting
  • DC-DC
  • LED Drivers


  • Input Voltage Range: 6.5V to 30V, 3-channel LED drivers: independent Analog or PWM dimming control for each channel
  • Reference Current: Adjustable by an external reference resistor
  • Ratio-optimized currents for 4 independent LED channels (AL1794 only): Suitable for Tunable White and Tunable Color
  • Low Standby Power: With EN pin
  • E-flicker free PWM dimming: Support 4KHz down to sub-1%
  • Internal Protections: Under Voltage Lockout (UVLO)
  • LED string open/short protection
  • Over temperature protection (OTP): Thermal fold-back and Thermal shut down
  • Fault Reporting: UVLO, OTP, Open, and Short
  • LED Power Good Reporting
  • Low system BOM cost
  • Ambient Temperature Range -40°C to +105°C

Product Specifications

Product Parameters

Qualified to AECQ10x No
Automotive Compliant PPAP No
Topology Linear LED Driver
Minimum Supply Voltage 6.5 V
Maximum Supply Voltage 30 V
Maximum VOUT 30 V
Number of Channels 3
LED Current Sense Voltage 1500 mV
Output Current 1500 mA
LED Current 1500 mA
Accuracy 2.5 %
Dimming Analog and PWM
Temperature Range -40 to 125 °C

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Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
AL1793AFE-13 Arrow Electronics Central EU 3000 8/8/2020 Buy Now Germany
AL1793AFE-13 Digi-Key Electronics 1451 8/8/2020 Buy Now United States
AL1793AFE-13 Mouser Electronics Inc. 52 8/8/2020 Buy Now United States
AL1793AFE-13 CEAC International Ltd. 20 8/4/2020 China