ICB1FL03G Infineon Technologies, ICB1FL03G Datasheet - Page 15

• 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

Figure 13
Furthermore the rectification effect (EOL2) is detected when the ratio of the higher amplitude divided by the
smaller amplitude of the lamp voltage is bigger than illustrated in Fig. 13. for longer than 500ms. The ratio is
evaluated each cycle of the lamp voltage. The limit of the ratio increases dependend on the peak current of the
smaller amplitude of the lamp voltage from 1,15 at I
If the EOL2 conditions are detected, the control is disabled and the status is latched as a failure mode. Measuring
the duration of incorrect operating conditions is done by a check every 4ms. If the fault condition is existing, a
counter counts up, if the fault condition is not existing, the counter counts down. So we get an integration of the
fault events that allows a very effective monitoring of strange operating conditions.
The detection of EOL1 and EOL2 requires an AC current input at the sense pin LVS for proper operation. A DC
current at pin LVS will lead to a defined reaction only, if the level exeeds 175µA (typically) for longer than 610µs
which results in a shut down and change over into the latched failure mode.
3.5
If there happens a situation like an open resonant circuit (e.g. a sudden break of the tube) the voltage across the
resonant capacitor and current through the shunt of the low-side inverter MOSFET rise quickly. This event is
detected by inverter current limitation (1,6V) and results in shut down of the control. This status is latched as a
failure mode.
In another kind of failure the operation of the inverter may leave the zero voltage switching (ZVS) and move into
capacitive mode operation or into operation below resonance. There are two different levels for capacitive mode
detection implemented in the IC. A first criteria detects low deviations from ZVS (CapLoad1) and changes
operation into fault mode, if this operation lasts longer than 500ms. For CapLoad1 the same counter is used as
for the end-of-life evaluation.
Preliminary Datasheet Version 1.02
Detection of capacitive mode operating conditions
Maximum ratio of amplitudes versus sense current.
2,5
2,3
1,4
1,3
1,1
2,2
1,5
2,4
2,1
1,9
1,8
1,7
1,6
1,2
2
1
0
I
LVS
= Lamp Voltage / Sense Resistor [uA]
50
100
LVS
= 200µA nonlinear to 1,4 at I
15
150
of smaller Amplitude
200
Functional Description
LVS
= 50µA.
250
ICB1FL03G
March 2009