AL1665 Universal Commercial Dimmable LED Controlle

By Diodes Incorporated 93

AL1665 Universal Commercial Dimmable LED Controlle

Diodes Incorporated AL1665 is a universal high-current precision, single-stage fly back and buck-boost controller. It uses the primary side regulation (PSR) control method, which can provide accurate constant current (CC) regulation without optocoupler and secondary control circuitry. It operates at BCM mode and keeps beneficial EMI and efficiency. It also keeps high PF and low THD over wide input-voltage. The AL1665 supports 0 V to 10 V analog dimming applications and direct PWM dimming and 0 V to 2.5 V analog dimming modes. The AL1665 features low startup current and low operation-current. AL1665 integrates full protection function and makes the LED driver more reliable. It is available in SO-8 packaging.

  • Universal wide input-voltage
    • Covers 85 VAC to 305 VAC
  • Support analog and PWM dimming
    • 0 V to 10 V analog dimming applications, works with all ANSI dimmers; direct PWM dimming resolution 0.5% to 100%, and 0 V to 2.5 V analog dimming
  • Cost-effective, fewer system level components
    • Adopt primary side regulation without optocoupler
  • High power factor and low total harmonic distortion
    • PF > 0.9, and THD < 20%
  • Tight LED current variation range across 85 VAC to 305 VAC
    • LED current line regulation: < ±2% typical
    • LED current load regulation: < ±2% typical full load to half load
  • High output-current accuracy
    • Factory tested and trimmed to achieve < 2% current accuracy for each unit


  • Commercial LED lighting
  • Middle power LED drivers
  • LED lighting luminaires