IR2159 Datasheet, PDF (7/25 Pages) International Rectifier – DIMMING BALLAST CONTROL IC

IR2159/IR21591 ^(S)
State Diagram
Power Turned On
SD > 2.0V
(Lamp Removal)
or
VCC < 10.9V
(Power Turned Off)
FAULT Mode
Fault Latch Set
1_{/2-Bridge Off}
I_QCC ≅ 240µA
CPH = 0V
VCC = 15.6V
Oscillator Off
T_J > 175C
(Over-
Temperature)
CS > V_CSTH (1.6V)
(Failure to Strike Lamp
or Hard Switching)
or
T_J > 175C
(Over-Temperature)
UVLO Mode
1_{/2-Bridge Off}
I_QCC ≅ 200µA
CPH = 0V
Oscillator Off
VCC > 12.5V (UV+)
and
VDC > 5.1V (Bus OK)
and
SD < 1.7V (Lamp OK)
and
T_J < 175C (T_jmax )
PREHEAT Mode
1_{/2-Bridge Oscillator On}
V_CSPK=V_IPH (Peak Current Control)
CPH Charging @ I_PH = 1µA
DIM = Open Circuit
Over-Current Disabled
CPH > 5.1V
(End of PREHEAT Mode)
IGNITION Mode
f_PH ramps to f _MIN
CPH Charging @ I_PH = 1µA
DIM = Open Circuit
Over-Current Enabled
CS > V_CSTH (1.6V)
(Over-Current or Hard Switching)
or
T_J > 175C
(Over-Temperature)
VCO < V_DIMTH
(End of IGNITION Mode)
DIM Mode
Phase _CS = Phase_REF
DIM = CPH
Over-Current Enabled
VCC < 10.9V
(VCC Fault or
Power Down)
or
VDC < 3.0V
(dc Bus/ac Line Fault
or Power Down)
or
SD > 2.0V
(Lamp Fault or
Lamp Removal)
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