ICB2FL03G Infineon Technologies, ICB2FL03G Datasheet - Page 25

• Manufacturer Part Number: ICB2FL03G
• Description: LED Drivers
• Manufacturer: Infineon Technologies

Specifications of ICB2FL03G

• Packages: PG-DSO-16
• Lead Free Status / Rohs Status: Details
• Other names: ICB2FL03GXT

2.4.3
A digital NOTCH filter eliminates the input voltage ripple independently of the mains frequency. A subsequent error
amplifier with PI characteristic ensures stable operation of the PFC preconverter
Figure 16
The zero current detection (ZCD) is sensed by the PFCZCD pin via R13
flow during demagnetization is required in CritCM and in DCM also. The input is equipped with a special filtering
system, including blanking of typically 500 ns and a large hysteresis of typically 0.5 V and 1.5 V V
(Figure
2.4.4
An additional feature is the THD correction
zones A shown in
signal (blue part of the PFC gate signal in
Figure
Figure
Preliminary Data Sheet
PFCVS
3) in addition to the gate signal controlled by the V
17).
16).
Σ∆-ADC
THD Correction via ZCD Signal
PFC Structure of Mixed Signals
Structure of the Mixed Digital and Analog Control of the PFC Preconverter
Figure 17
ZCD @ AC Input Voltage), there is a possibility to extend the pulse width of the gate
Int. Reference
V
Under Voltage
Over Voltage
Bus Voltage
PFCVS
Notch Filter
Open Loop
12.5%
109%
95%
75%
= 2.5 V
(Figure
Figure
PI Loop Control
17) with the variable PFC ZCD resistor (see resistor R13 in
16). In order to optimize the improved THD (especially in the
25
Controller for Fluorescent Lamp Ballasts
PFCVS
signal (gray part of the PFC gate signal in
Clock 870 kHz
ZCD Start Up
Over Current
1.5V / 0.5V
(Figure
1V ± 5.0%
Correction
PWM
THD
3). Notification of finished current
(Figure
Functional Description
16).
Gate Drive
V1.1, 2012-04-10
ICB2FL03G
PFCZCD
PFCGD
PFCCS
PFCZCD