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IR1155S Datasheet(PDF) 8 Page - International Rectifier

Part # IR1155S
Description  PROGRAMMABLE FREQUENCY, ONE CYCLE CONTROL PFC IC
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Manufacturer  IRF [International Rectifier]
Direct Link  http://www.irf.com
Logo IRF - International Rectifier

IR1155S Datasheet(HTML) 8 Page - International Rectifier

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IR1155S
www.irf.com
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© 2011 International Rectifier
Block Diagram
VREF
VFB
COMP
VCOMP Discharge
VOVP
VOLP
Q
S
R1
ISNS
Vm
OSCILLATOR
COM
VCC
GATE
RESET
OVP
V BIAS
V BIAS
V BIAS
V BIAS
V BIAS
VBIAS
MAX
DUTY CYCLE
LIMIT
Blanking
Pulse at Ton
V BIAS
V BIAS
VCC
Q
RQ
S1
250mV
VISNS(PK)
OVP
VSLEEP
Enable
Comparator
(SLEEP MODE)
VBIAS
FREQ
RAMP
+
-
VSUMMER
V BIAS
UVLO
VOVP = 106% VREF
VREF
VOLP = 19%VREF
Internal Rail
&
Precision
Reference
250mV
VSLEEP
VOUV = 50% VREF
80% VREF
OVP
VCC OK
PWM OFF
GATE OFF
GATE OFF
RESET
SET
MAX
DUTY
OCP
OSC
BLANK
0
VCOMP
Open Loop
Comparator
(Stand-By Mode)
SLEEP
(POWER
OFF)
UVLO/SLEEP
STNDBY
VCOMP Discharge
Threshold
Comparator
Overvoltage
Comparator
Peak
Overcurrent
Comparator
SLEEP


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