ICB1FL03G Infineon Technologies, ICB1FL03G Datasheet - Page 32

• Manufacturer Part Number: ICB1FL03G
• Description: IC SMART BALLAST CONTROL DSO18
• Manufacturer: Infineon Technologies
• Type: PFC/Ballast Controllerr

Specifications of ICB1FL03G

• Frequency: 20 ~ 100 kHz
• Current - Supply: 5mA
• Voltage - Supply: 8.4 V ~ 17 V
• Operating Temperature: -25°C ~ 125°C
• Package / Case: 20-SOIC (0.300", 7.50mm Width) 18 leads
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Lead Free Status / Rohs Status: Details

Finally the resistors R24, R25 can be calculated from IC20 and the current limitation threshold during ignition
mode.
Selected values are R24= 0,82Ohm; R25= 0,82Ohm.
Lamp voltage sense resistors R41, R42, R43:
The selected lamp type 54W-T5 has a typical run voltage of 167V peak. We decide to set the EOL-thresholds at
a level of 1,5 times the run voltage level (= 250,5V peak).
Selected values: R41= 390k; R42= 390k; R43= 390k (R41+R42+R43=1170k).
Current source resistors R34, R35 for detection of high-side filament:
Selected values: R34= 2,2M; R35= 2,2M;
Current limitation resistor R30 for floating bootstrap capacitor C14:
A factor of 2 is provided in order to keep current level significant below LSCS turn-off threshold.
Selected value: R30= 10Ohm.
Low-side filament sense resistor R36:
For a single lamp ballast
Selected value: R36= 56k
Low pass filter capacitor C19:
Capacitor C19 provides a low pass filter together with resistor R36 in order to suppress AC voltage drop at the
low-side filament. When we estimate an AC voltage of 10V peak-to-peak at low-side filament during run mode at
f
Selected value for better ripple suppression: C19= 22nF.
Preliminary Datasheet Version 1.02
RUN
= 40kHz, we need a suppression of at least a factor F
R
34
+
R
35
R
30
=
≥
C
-------------------------------------------- -
I
R
LVSSINKMAX
--------------------------------- -
V
19
2 V
--------------------------
R
41
R
LSCSOVC
⋅
24
V
=
24
+
R
INMIN
CCON
+
------------------------- -
2 π f
⋅
R
36
R
⋅
R
42
25
≤
25
⋅
+
V
------------------------------------ -
F
I
R
RUN
RESC1MIN
=
2
LP
RES3MIN
⋅
43
--------------------------
R
R
V
-------------------------------------- -
–
24
24
LSCSLIMIT
–
=
1
⋅
(
+
R
R
⋅
-------------------------- -
I
I
LVSEOL
R
36
C20
V
41
R
25
25
LEOL
+
=
32
R
=
=
-------------------------- -
2 π 40kHz 56k
42
LP
⋅
2 14V
----------------- - 0 82
------------------- -
27 0µA
1 6V
1 55V
= 100 (-40dB).
+
⋅
,
,
,
=
=
⋅
R
100
----------------
1 65A
43
250 5V
-------------------
0 8V
215µA
,
,
2
)
⋅
,
----------------------------- -
0 82
–
=
=
,
,
1
⋅
57 4kΩ
------------- -
26µA
200V
=
+
,
=
⋅
0 485Ω
0 82
0 82
,
1165kΩ
,
,
=
–
7 1nF
(
1170k
,
=
Application Examples
7 18Ω
,
)
=
6522kΩ
ICB1FL03G
March 2009