AiT Semiconductor introduces AC input LED constant current driver. The A9912 is a high-voltage buck control IC for constant LED current regulation. The A9912 operates in constant off-time mode. It allows efficient operation of High Brightness (HB) LEDs from voltage sources ranging from 8 VDC up to 450 VDC or 110 VAC/220 VAC.
The A9912 includes a PWM dimming input that can accept an external control signal with a duty ratio of 0~100% and a frequency of up to a few kilohertz, and the dimming also accepts a 0~1.2 V linear input signal. The RNTC pin can accept a 0~250 mV Line Dimming input which can be used for temperature compensation of the LED current.
The A9912 is available in SOP8 package.
Key features
- Switch mode controller for single switch LED Drivers
- Open loop peak current controller
- Wide Input range from 8 VDC~450 VDC or 110 VAC/220 VAC
- Application from a few mA to more than 1A output
- Up to hundreds of LEDs
- Constant off-time operation
- Linear and PWM dimming capability
- Requires few external components for operation
- Temperature compensation to regulate LED current
- Available in SOP8 Package
Key applications
- DC/DC or AC/DC LED driver applications
- RGB backlighting LED driver
- General purpose constant current source
- Signal and decorative LED lighting
Click here to learn more about A9912M8VR
