ICB2FL01GXT Infineon Technologies, ICB2FL01GXT Datasheet - Page 22

• Manufacturer Part Number: ICB2FL01GXT
• Manufacturer: Infineon Technologies

Specifications of ICB2FL01GXT

• Driver Type: Fluorescent Lamp
• Number Of Segments: 1
• Operating Temperature (min): -25C
• Operating Temperature (max): 125C
• Operating Temperature Classification: Commercial
• Package Type: DSO
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

2.4.3 PFC Structure of Mixed Signal
A digital NOTCH filter eliminates the input voltage ripple - independent from the mains frequency. A
subsequent error amplifier with PI characteristic cares for a stable operation of the PFC pre converter
(Figure 16).
Figure 16: Structure of the mixed digital and analog control of the PFC pre converter
The zero current detection (ZCD) is sensed by the PFCZCD pin via R13 (Figure 3). The information of
finished current flow during demagnetization is required in CritCM and in DCM as well. The input is
equipped with a special filtering including a blanking of typically 500 ns and a large hysteresis of
typically 0.5 V and 1.5 V V
Datasheet
PFCVS
Σ∆-ADC
PFCZCD
V
Int. Reference
Under Voltage
Over Voltage
Bus Voltage
PFCVS
Notch Filter
Open Loop
12.5%
109%
95%
75%
= 2.5 V
2
(Figure 16).
nd
Generation FL-Controller for FL-Ballasts
Page 22 of 56
PI Loop Control
Clock 870 kHz
ZCD Start Up
Over Current
1.5V / 0.5V
1V ± 5.0%
Correction
PWM
THD
Functional Description
Gate Drive
ICB2FL01G
PFCZCD
V1.2
PFCGD
PFCCS