ICL5101_16 Datasheet, PDF (22/44 Pages) Infineon Technologies AG – Resonant controller IC with PFC for LED driver

ICL5101
Functional Description
2.3.4
PFC Structure of Mixed Signals
A digital NOTCH filter eliminates the input voltage ripple independent of the mains frequency. A subsequent
error amplifier with PI characteristic ensures stable operation of the PFC pre-converter (Figure 16)
Figure 16 PFC Mixed Signal Structure
The zero current detection (ZCD) is sensed by the PFC ZCD. Indication of finished current flow during
demagnetization is required in CrCM and in DCM as well. The input is equipped with a special filtering, including
an extended saturation of typically 500 ns and a large hysteresis of typically V_PFCZCD between 0.5 V and 1.5 V.
Datasheet
22
Rev. 1.3, 2016-01-15