ICB2FL01G Datasheet, PDF (39/56 Pages) Infineon Technologies AG – Smart Ballast Control IC for Fluorescent Lamp Ballasts

2^nd Generation FL-Controller for FL-Ballasts
State Diagram
3.3 Auto Restart and Latched Fault Condition Mode
Fault A
Auto Restart
Surge;
Time OUT Start Up
(VBUS < 95% for t >
80 ms)
Fault F
Fault, single Restart
Open Filament LS;
Inverter Overcurrent;
Capacitive Load 1;
Capacitive Load 2;
Timeout Ignition;
EOL 1 (Overload);
EOL 2 (Rectifier Effect);
Fault U
BUS Voltage
BUS Undervoltage
(VBUS < 75%
during Run Mode
for t > 84µs);
BUS Overvoltage
(VBUS > 109%
for t > 625ms);
Increment
Fault Counter
INVERTER and PFC Gate OFF
Only at Inverter Over current PFC Gate
OFF appr. 150µs Delayed
Power down Icc < 160µA
Wait 200ms
Delay Timer A
NOTE
to Set Flag Skip Preheat:
When using external Vcc
Supply, no reset of Set Flag
Skip Preheat. 1st Restart
without Preheating while
Vcc > UVLO. When LVS
deactivated or not from Line.
Set Flag
Skip Preheat
Gate drives off
Power down
Icc < 160µA
Wait 100ms
Delay Timer A
Fault Counter
<2
Y
Increment
Counter Skip PH
Start
Start-up
Inverter Gates on
PFC Gate on
17.5V> Vcc >10.6V
f_Inv = f_START
N
Reset
Fault Counter
Wait for
Lamp Removal
Lamp removed
for min 100ms
Wait for
Lamp inserted
Lamp
inserted?
N
Y
Lamp inserted
N
for min 100ms
Counter
Skip Preheat
Y
>7?
N
Gate drives off
IC remains
in active mode
NOTE
For external Vcc
Supply, set Vcc
below UVLO.
Lamp Inserted?
N
Or
VBUS < 75%
Wait for
Y
UVLO
t > 80ms? _N
from Power-Up
Y
VBUS > 95%?
Y
Vcc > 14.1V?
N
Reset
Flag Skip Preheat
& Counter Skip PH
Vcc < 10.6V?
N
Fault A
Timeout 80ms
Start-up
End
Start-up
Y
Power-up
Gate Drives off
Note:
Fault Counter reset
after 40s in Run Mode
Reset of Flag Skip
Preheat after Ignition
Y
UVLO
Reset all Latches
Figure 39: Operating Process during Start-up Mode and Handling of Fault Conditions
Datasheet
Page 39 of 56
ICB2FL01G
V1.2