ICB2FL03G Infineon Technologies, ICB2FL03G Datasheet - Page 26

• 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

Figure 17
In the case of DC input voltage (see DC input voltage in
combination of the gate signal controlled by the V
by the ZCD pin (blue) shown in
The PFC current limitation at pin PFCCS interrupts the ON time of the PFC MOSFET if the voltage drop at the
shunt resistors R18
sufficient signal from ZCD becomes available (Auto Restart). The first value of the resistor can be calculated by
the ratio of the PFC mains choke and ZCD winding by the bus voltage and a current of typically 1.5 mA (see
equation below for a good practical value of resistance of ZCD). An adjustment of the ZCD resistor causes an
optimized THD.
2.5
Two effects are present by End of Life (EOL): lamp overvoltage (EOL1) and a rectifier effect (EOL2).
After ignition (see 1 in
On reaching the run frequency, the IC enters the pre-run mode for 625 ms. During this period, the EOL detection
is still disabled. In the subsequent run mode (2 in
Figure
Preliminary Data Sheet
Voltage at
ZCD-Winding
PFC Gate
Drive Voltage
18) and EOL2 (rectifier effect; see 4,
THD Optimization using adjustable Pulse Width Extension
Detection of End-of-Life and Rectifier Effect
0
0
0
PFC gate signal (gray) controlled by the V
PFC gate signal (blue) controlled by the ZCD
(Figure
Figure
A
ZCD @ AC Input Voltage
18), the lamp voltage breaks down to its run voltage level with decreasing frequency.
3) exceeds V
Figure 17
Rectified
AC Input Voltage
B
R
ZCD @ DC input voltage.
PFCCS
ZCD
Figure
=
PFCVS
PFCVS
= 1.0 V
N
N
Figure
A
18) is enabled completely.
ZCD
PFC
1
26
5 .
pin (gray) and the additional pulse width signal controlled
mA
*
(Figure
V
Figure
18) the detection of EOL1 (lamp overvoltage; see 3,
Controller for Fluorescent Lamp Ballasts
BUS
17), the pulse width gate signal is fixed as a
16). This interrupt will restart after the next
ZCD @ DC Input Voltage
DC Input Voltage
Functional Description
V1.1, 2012-04-10
ICB2FL03G