ICB1FL02G Datasheet, PDF (17/37 Pages) Infineon Technologies AG – Smart Ballast Control IC for Fluorescent Lamp Ballasts

ICB1FL02G
Functional Description
The status failure mode is kept as long until a lamp removal is detected (interruption of current across filaments
and detection of the return of the current) or the supply voltage drops below UVLO. After a break down of the
supply voltage below the undervoltage lockout (UVLO) threshold the IC resets any failure latch and will try to
restart as soon as Vcc exceeds the start-up threshold.
An undervoltage (75%) of the bus voltage will not be latched as a fault condition. If the undervoltage lasts longer
than 80µs the Gate drives are switched off and the IC tries to restart after a Vcc hysteresis has been passed.
V_CC
16,0V
14,0V
10,5V
IC
FAULT LATCH
ACTIVE SET E.G. BY EOL
LAMP
REMOVAL
LS + HS
OPEN
V_RES>1,3V
I_VCC
5mA
+ QGate
<170µA
<150µA
V_RES
5,0V
3,2V
1,6V
1,3V
0,375V
I_RES
41µA
20µA
I_LVS
<2,5mA
1,6V
20µA
32 CYCLES (>50ms typically)
>15µA
>15µA
34µA
1,3V
17µA
>15µA
POWER
DOWN
SIGNAL
H
TRANSIENT
AT LVS PIN
FAULT
LATCH
SIGNAL
SET SIGNAL
RESET SIGNAL
IC ACTIVE
SOFTSTART
t
5mA
+ QGate
t
<3,2V
t
20µA
t
< +/- 2,5mA ^t
H
t
t
Figure 15 Interruption of operation by a fault condition and subsequent lamp removal.
Datasheet Version 1.2
17
February 2006