Datasheet

IR2161(
S
) & (PbF)
6 www.irf.com
NOTE: If the IR2161 die temperature exceeds 135
o
at any time the system will enter FAULT Mode. At a typical frequency of
40kHz, the die temperature is approximately 12
o
C above the ambient air temperature
UVLO Mode
I
QCC
≅
300
μA
Oscillator Off
SOFTSTART
Mode
RUN Mode
Fault Timing Mode
VCC > 12.1V (VCCUV+)
VCSD > 5.2V
(End of SOFTSTART Mode)
CSD discharged to 0V
Power Turned On
SHUTDOWN Mode
(Over-Temperature)
(Phase Cut Dimming)
- Bridge On
CSD charged from Isource
Initial frequency 130kHz
Frequency ramps down to
f
(min)
-Bridge Off
1
/
2
1
/
2
CSD switched to Comp function
CSD varies between
V
CSD (min) = 0 for f(min)
to VCSD(max) = 5.5V for f(max)
Fault Detected (Vpk at VCS > 0.56V (V ))
CSD switched to Shutdown Circuit
Frequency defaults to f(min)
- Bridge On
1
/
2
VCS >0.56V(VCSOL)=Overload:CSD slow charge
V
CS > 1.2V (VCSSC) = Short Circuit : CSD
fast charge
Fault Removed
CSD switched to
run mode
(Vpk at V
CS < 0.5V)
Fault Confirmed
(V
CSD > 12V)
CSD is slowly discharged
Auto-Restart Timeout
(V
CSD < 2.4V) (VCSDRS)
CSD switched to run mode
Oscillator On
CSD initialized to 5V (VCSDOL)
CSD is slowly
discharged to 2.4V
(V
CSDRS)
Delay
STANDBY Mode
I
QCC
≅
300
μ
A
Oscillator Off
-Bridge Off
1
/
2
VCC < 5.5V (VCCUVL-)
(Power Turned Off)
VCC > 12.1V(VCCUV+)
Oscillator On
FAULT Mode
Oscillator Off
-Bridge Off
1
/
2
VCC < 5.5V (VCCUVL-)
(Power Turned Off)
Fault Detected
(Vpk at V
CS > 0.56V)(V )
CSD = 0V
(Over-Temperature)
Voltage compensation active
(Phase Cut Dimming)
T
J
(T
jmax
)
T
J
(T
jmax
)
T
J
(T
jmax
)
T
J
(T
jmax
)
-Bridge Off
1
/
2
(VCSLATCH)
Fault Detected
(Vpk at V
CS > 9V)
(V )
(V
CSDSD)
<135 C
o
<135 C
o
<135 C
o
<135 C
o
CSOL
VCC < 10.5V (V )
CCUV-
VCC < 10.5V (V )
CCUV-
CSOL
CSOL
All values are typical