IR2166
State Diagram
Power Turned On
UVLO Mode
1/2-Bridge Off
IQCC 400µA
CPH = 0V
CT = 0V (Oscillator Off)
VCC < 9.5V
VCC > 11.5V (UV+)
and
SD/EOL < 5.0V
(VCC Fault or Power Down)
or
SD/EOL > 5.0V
SD/EOL > 5.0V
(Lamp Removal)
or
(Lamp Fault or Lamp Removal)
VCC < 9.5V (UV-)
(Power Turned Off)
PREHEAT Mode
1/2-Bridge oscillating @ f PH
RPH // RT
CPH Charging @ I CPH = 5 µA
PFC Enabled (High Gain)
CS Enabled
FAULT Mode
Fault Latch Set
1/2-Bridge Off
IQCC 180µA
CPH = 0V
VCC = 15.6V
CS > 1.3V for 25
cycles
Fault Counter Enabled
CT = 0V (Oscillator Off)
CPH > 10V
(End of PREHEAT Mode)
Ignition Ramp
CS > 1.3V for 25 cycles
(Failure to Strike Lamp)
Mode
RPH!Open
PH ramps to fRUN
CPH charging
f
CPH > 12V
CS > 1.3V
(Lamp Fault)
or
RUN Mode
SD/EOL<1.0V or SD/EOL>3.0V
(End-of-Life)
RPH = Open
1/2-Bridge Oscillating @fRUN
EOL Thresholds Enabled
PFC = Low Gain Mode
VBUS UV Threshold Enabled
Fault Counter Disabled
Discharge
VCC
VBUS<3.0V
to UVLO-
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7
INFINEON [ Infineon ]
