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T HI Duration of EN Logic High for pulse dimming 0.5 -- -- Time of EN Logic Logic-Low T LO Duration of EN Logic Low for pulse dimming 0.5 -- 10 μs Shutdown Delay T SHDN From EN
https://www.richtek.com/assets/product_file/RT9302/DS9302-04.pdf
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The dimming of white LEDs' current can be achieved by applying a pulse signal to the EN
Products ▶ LED Drivers ▶ RGB & White LED Drivers ▶ RT9302
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WLEDs in Two Strings Independent PWM Dimming and 1-Wire Dimming Control PWM Dimming Frequency from 20k to 100kHz Up to 10 Bit Dimming Resolution
https://www.richtek.com/assets/product_file/RT4531/DS4531-03.pdf
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LED dimming control can be done from either analog or PWM signal
Products ▶ LED Drivers ▶ Backlight LED Drivers ▶ RT4528
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Controller with Dimming Control 2015/05/19
Products ▶ Switching Regulators ▶ Step-Up (Boost) Controllers ▶ RT8525
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The RT8567A also integrates PWM dimming function for accurate LED current control
Products ▶ LED Drivers ▶ RGB & White LED Drivers ▶ RT8567A
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PWM dimming is implemented with external PWM input signal
Products ▶ LED Drivers ▶ RGB & White LED Drivers ▶ RT8576A
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LED dimming control can be done from either analog or PWM signal
Products ▶ LED Drivers ▶ Backlight LED Drivers ▶ RT8498
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Boost Controller with Dimming Control Pin Configurations SOP-14 (TOP VIEW) Marking
https://www.richtek.com/assets/product_file/RT8525/DS8525-01.pdf
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Local dimming
https://www.richtek.com/~/media/AN PDF/AN006_TW.pdf
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