Device description

ALED6001

18/26

DocID026965 Rev 2

Figure 9. High-side dimming control by using a P-channel MOSFET

The regulation loop continuously compares the differential voltage drop with an internal

reference and adjusts the switching duty cycle accordingly. In order to provide design

flexibility and analog dimming capability, the internal feedback reference can be changed

through the ADIM pin. As visible in Figure 10, the reference voltage is proportional to the

voltage at the ADIM pin within a limited range.

Equation 5