Układy scalone sterowników LED

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AL8853 High-Performance Boost LED Controller

Diodes Incorporated AL8853 High-Performance Boost LED Controller is a highly integrated and cost-effective LED driver-controller, ideal for applications where the required LED chain length exceeds the input power rail. The Diodes Incorporated AL8853 contains a PWM boost driver, which uses current-mode control and fixed-frequency operation to regulate the LED current. The LED current is sensed through an external current sense resistor. The voltage across the sensing resistor is compared with a reference level of 200mV. The error is amplified to control the pulse width of the power switch to regulate the current flowing through the LED. The AL8853 offers PWM-to-analog dimming for a wide range of dimming control.

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