
State Diagram
Power Off
VCC < 10.5V (VCCUV-)
or
LO > 8.75V (VLOSD+)
(Lamp Removed)
VCC > 0V
UVLO Mode
Half-Bridge Off
IQCCUV ≅ 250μA
VCO = 0V
HO Off
LO Open Circuit
VCC > 12.5V (VCCUV+)
and
LO < 8.5V (VLOSD-)
(Lamp Inserted)
FAULT Mode
Fault Latch Set
Half-Bridge Off
IQCCUV ≅ 250μA
HO Off
LO Open Circuit
VCO > 4.0V
(VVCOFLT+)
(Lamp non-strike)
PH/IGN Mode
Half-Bridge Oscillating
Freq ramps from fMAX to fMIN
VCO Charging (1μA)
non-ZVS Disabled
Crest Factor Disabled
Lamp Ignites
CF > 5.5 (lamp removal)
ZVS
freq = freq + df
non-ZVS
ZVS OK
DIM Mode
Half-Bridge Oscillating @fDIM
Dimming Loop Enabled
non-ZVS Enabled
Crest Factor Enabled
IRS2530D(S)
VCC < 10.5V (VCCUV-)
www.irf.com
© 2008 International Rectifier
11