Diodes Incorporated AL1666 LED Driver-Controller

Diodes Incorporated AL1666 LED Driver-Controller is a universal high-current precision, single-stage fly-back, and buck-boost controller. This LED controller features a Primary-Side Regulation (PSR) control method and provides Constant Current (CC) regulation without opto-coupler and secondary control circuitry. The AL1666 LED driver controller operates at Broadcom SoC channel (BCM) mode and provides good EMI, efficiency, and high PF with low THD. This controller features 85V_AC to 305V_AC wide input voltage range and is available in the SO8 package. The AL1666 LED controller operates at 0V to 2.4V DC signal in analog dimming mode and in PWM-to-DC mode with a dimming range from 1% to 100%.

Features

Primary side regulation without opto-coupler
Valley switching for low switching loss
Support analog and PWM-to-DC dimming
1% to 100% analog/PWM-to-DC dimming range
0.4V ±1.5% tight CS reference voltage
High PF >0.9 and low THD <20%
High efficiency
Tight LED current variation range:
- LED current line regulation: ±2% (90V_AC to 305V_AC)
- LED current load regulation: ±2% full load to half load

Internal protections:
- Under Voltage Lock Out (UVLO)
- Output Over Voltage Protection (OVP)
- Output Short Protection (OSP)
- Over Current Protection (OCP)
- Winding Short Circuit Protection
- Secondary Diode Short Protection
- Internal Thermal fold-back Protection (TFP)
- Over Temperature Protection (OTP)

Applications

LED driver up to 100W
Dimmable LED lighting luminaires
Commercial LED lighting fixtures

Industrial LED lighting
Mid-power LED drivers

Diodes Incorporated AL1666 LED Driver-Controller

Features

Applications

Typical Application Circuit

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