IRS2168 International Rectifier Corp., IRS2168 Datasheet - Page 8

• Manufacturer Part Number: IRS2168
• Description: Advanced Pfc And Ballast Control Ic In A 16-lead Soic Package
• Manufacturer: International Rectifier Corp.

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State Diagram
FAULT Mode
I
Fault Latch Set
QCCFLT
1
V
/
CPH = 0 V
2
V
CC
-Bridge Off
PFC Off
CO
= 15.6V
≅ 400 µA
= 0 V
CS > 1.2 V (VCSTH+) for 65
events (nEVENTS)
SD/EOL < 1.0 V (V
SD/EOL > 3.0 V (V
current sink (IV
SD/EOL > 5.0 V (V
(Lamp Removal)
V
(Power Turned Off)
slightly with 0.6 mA
CC
VCO discharged
CS Regulation
or
or
< 10.5 V (V
or
Please refer to application diagram on page 1.
CS > 1. 2V (V
65 events (n
COIGN
CCUV-
EOLTH-
EOLTH+)
SDTH+
)
)
C
(V
for
CS>1.2 V
(V
S
)
)
CSTH+
<1.2 V
CSTH-)
EVENTS
CSTH+
)
All values are typical.
)
)
VCO ramping up through RPH
CPH charging through RCPH
CPH charging through RCPH
1/2-Bridge Oscillating @f
Power Turned On
Ignition Regulation Disabled
Ignition Regulation Enabled
CS Fault Counter Disabled
V
1
C
PREHEAT Mode
PFC Enabled (High Gain)
C
EOL Thresholds Enabled
/
IGNITION Mode
BUS UV
2
PFC = High Gain Mode
S
S
PFC = Low Gain Mode
-Bridge oscillating @ f
Fault Counter Enabled
Fault Counter Enabled
UVLO Mode
RUN Mode
f
CPH discharged
I
PH
QCCUV
1
RPH // R
to CPHSOI-
/
Threshold Enabled
VCO = 2 V
CPH = 0 V
VCO = 0 V
2
ramps to f
V
-Bridge Off
PFC Off
CO
≅ 250 µA
= 0 V
CPH > 9.3 V (V
(End of IGNITION Mode)
V
SD/EOL < 3.0 V (V
CPH > 9.3 V (V
(End of PREHEAT Mode)
CPH < 4.9 V (V
(Start of IGNITION Mode)
CC
FMIN
RUN
> 12.5 V (V
and
RUN
PH
CPHRUN
CCUV+
CPHEOP+
CPHSOI-
SD/EOL > 5.0 V (V
(Lamp Fault or Lamp Removal)
SDTH-
)
)
)
)
)
V
BUS
(V
BUSUV-
< 3.0 V
)
SDTH+
V
(V
CC
CC
)
Discharge V
to UVLO
IRS2168D(S)PbF
< 10.5V (V
Fault or Power Down)
CCUV-
CC
)
Page 8