ICB2FL01GXT Infineon Technologies, ICB2FL01GXT Datasheet - Page 23
![no-image](/images/manufacturer_photos/0/3/327/infineon_technologies_sml.jpg)
ICB2FL01GXT
Manufacturer Part Number
ICB2FL01GXT
Description
Manufacturer
Infineon Technologies
Datasheet
1.ICB2FL01GXT.pdf
(56 pages)
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
2.4.4 THD Correction via ZCD Signal
An additional feature is the THD correction (Figure 16). In order to optimize the improved THD
(especially in the zones A shown in Figure 17 ZCD @ AC Input Voltage), there is a possibility to
extend pulse width of the gate signal (blue part of the PFC gate signal in Figure 17) via variable PFC
ZCD resistor (see Resistor R13 in Figure 3) in addition to the gate signal controlled by the V
signal (gray part of the PFC gate signal in Figure 17).
Figure 17: THD Optimization using adjustable Pulse Width Extension
In case of DC input voltage (see DC Input Voltage in Figure 17), the pulse width gate signal is fixed as
a combination of the gate signal controlled by the V
signal controlled by the ZCD pin (blue) shown in Figure 17 ZCD @ DC Input Voltage.
The PFC current limitation at pin PFCCS interrupts the ON – time of the PFC MOSFET if the voltage
drop at the shunt resistors R18 (Figure 3) exceeds the V
restart after the next sufficient signal from ZCD is available (Auto Restart). The first value of the
resistor can be calculated by the ratio of the PFC mains choke and ZCD winding the bus voltage and a
current of typically 1.5 mA (see equation below). An adjustment of the ZCD resistor causes an
optimized THD.
Datasheet
Voltage at
ZCD-Winding
PFC Gate
Drive Voltage
0
0
0
PFC gate signal (gray) controlled by the V
PFC gate signal (blue) controlled by the ZCD
A
ZCD @ AC Input Voltage
Rectified
AC Input Voltage
Equation 1: R
2
nd
B
Generation FL-Controller for FL-Ballasts
R
ZCD
Page 23 of 56
PFCVS
ZCD
A
a good pratical Value
N
N
PFCVS
ZCD
PFC
1
5 .
mA
*
PFCCS
pin (gray) and the additional pulse width
V
BUS
= 1.0 V (Figure 16). This interrupt will
ZCD @ DC Input Voltage
Functional Description
DC Input Voltage
ICB2FL01G
PFCVS
V1.2