Multiple Dimming Isolated PWM Controller for high-performance LED lighting

Diodes Incorporated announced the availability of the versatile dimming input controller for offline LED lamps. AL8116 works with three types of dimmer signal formats:

1. 0 to 10 V dimming voltage
2. PWM (Pulse Width Modulation) signal
3. Simple potentiometer

It converts these to a PWM output signal which can easily be used to provide an isolated dimming control via an optocoupler to the primary side LED driver.

Features

• Wide VCC Operating Range 10 V to 56 V
• Low Operation Current (Typical 600 μA)
• Precision Dimmer Type with
• Voltage Potential: 0/1 V to 10 V
• PWM Dimming: 0.2 kHz to 10 kHz
• Potentiometer: 0 to 100 kΩ
• Adjustable Bias Current Source of DIM Pin
• Accurate Output Duty Cycle Tolerance ±2.5%
• Adjustable Minimum Output PWM Duty Clamping: 8%, 6%, 4%, and 2%
• Built-In Over Temperature Protection for Chip
• Totally Lead-Free & Fully RoHS Compliant

The AL8116 has a wide supply voltage range from 10 V to 56 V. The AL8116 Output Duty Cycle accuracy is typically ±2.5% and its minimum Output Duty cycle can be set through a CLAMP pin resistor.

The AL8116 has internal overtemperature protection (OTP) and it is available in the SOT26 package.

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