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TPS92070EVM-648 Integrated Dimming LED Lighting Driver Converter for 230 VAC Input.

I am working with TPS92070EVM-648 Integrated Dimming LED Lighting Driver Converter for 230 VAC Input. In the data sheet it is mentioned as an Integrated Dimming LED Lighting Driver Converter . I want to know how we can give the dimming control signal to the driver. Also I want to know which type of dimming either pwm or other type is carried out in the device. If it is PWM dimming I want to know Whether the pwm is generated internally or we have to give externally generated pwm signals.