ICB1FL02G Datasheet, PDF (19/37 Pages) Infineon Technologies AG – Smart Ballast Control IC for Fluorescent Lamp Ballasts

5 Protection Functions
Description of Fault
Fault-Type
ICB1FL02G
Protection Functions
Detection active during Consequence
+/- Peak Level of Lamp Voltage
above threshold
EOL1
610µs
X Power down,
latched Fault Mode
Ratio of +/- amplitudes of lamp
voltage > 1.15 or < 0.85
EOL2
500ms
X Power down,
latched Fault Mode
No zero voltage switching
Cap.Load 1
500ms
X Power down,
latched Fault Mode
Voltage at Pin RES > 3.0V
Open Filament 500ms
X Power down,
latched Fault Mode
Bus voltage > 109% of rated level
in active operation
Overvoltage
500ms
X Power down,
latched Fault Mode
Bus voltage > 109% of rated level
10µs after power up
Overvoltage
Gate drivers off, restart
after V_CC hysteresis
Bus voltage > 109% of rated level PFC
5µs
X X X X X Turn-off PFC MOSFET
in active operation
Overvoltage
until Bus Voltage < 105%
Bus voltage < 75% of rated level
Bus voltage < 15% of rated level
Undervoltage 80µs
X Gate drivers off, restart
after V_CC hysteresis
Open Loop
Detection
1µs
X X X X X Power down
Capacitive Load,
Cap.Load 2
610µs
X
Operation below resonance
X Power down,
latched Fault Mode
Run frequency can not be achieved No Ignition
235ms
X
Power down,
latched Fault Mode
Voltage at Pin RES > 1.6V
before power up
LS open
1ms
Filament
Prevents power up
Current into Pin LVS1 < 12µA
HS open
1ms
Filament
Prevents power up
Current into Pin LVS2 < 12µA
HS open
1ms
Filament
Prevents power up
Voltage at Pin PFCCS > 1.0V
PFC
Overcurrent
260ns X X X X X Turn-off PFC MOSFET
immediately
Voltage at Pin LSCS > 0.8V
Inverter Current 250ns
X
Limit
Increases the Operating
Frequency
Voltage at Pin LSCS > 1.6V
Inverter
Overcurrent
400ns X X X X X Power Down, Latched
Fault Mode
Supply voltage at Pin VCC < 14.0V Below startup 1µs
before power up
threshold
Prevents power up
Supply voltage at Pin VCC < 10.5V Below UVLO 1µs
after power up
threshold
X X X X X Power Down, Reset of
Latched Fault Mode
Datasheet Version 1.2
19
February 2006