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IP1202 데이터시트(PDF) 14 Page - International Rectifier

부품명 IP1202
상세설명  Dual Output Full Function 2 Phase Synchronous Buck Power Block Integrated Power Semiconductors, PWM Control & Passives
PDF  29 Pages
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제조업체  IRF [International Rectifier]
홈페이지  http://www.irf.com
Logo IRF - International Rectifier

IP1202 데이터시트(HTML) 14 Page - International Rectifier

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14
iP1202
Fig. 14: iP1202 Dual Output Simplified Schematic
VIN
SS1
VP-REF
FB1S
FB1
VSW1
HICCUP
CC1
PGOOD
SS2
VREF
RT
SYNC
VSW2
FB2
FB2S
CC2
OC2
ENABLE
OC1
iP1202
VIN
SS1
VP-REF
FB1S
FB1
VSW1
HICCUP
CC1
PGOOD
SS2
VREF
RT
SYNC
VSW2
FB2
FB2S
CC2
OC2
ENABLE
OC1
C8
0.1uF
L1
1.0uH
Cout1
470uF
R9
887
R7
1k
C9
0.018uF
R5
2.49k
L2
1.0uH
C11
0.012uF
R6
3.32k
C7
0.1uF
R3
30.9k
C10
100pF
R1
100k
R2
100k
0.8V
VOUT1
1.5V
Cin
22uF
PGND
VIN
12V
R10
2.15k
R8
1k
Cout2
470uF
VOUT2
2.5V
x6
x2
x2
ROC1
51.1k
ROC2
51.1k
PGOOD
This is an output voltage status signal that is open
collector and is pulled low when the output voltage
falls below 85% of the output voltage. High state in-
dicates that outputs are in regulation. There is only
one PGOOD for both outputs. The PGOOD pin can
be left floating if not used.
Thermal Shutdown
The iP1202 provides thermal shutdown. The thresh-
old typically is set to 140°C. When the trip threshold
is exceeded, thermal shutdown turns the outputs off.
Thermal shutdown is not latched and automatic re-
start is initiated when the sensed temperature drops
to the normal range.
Refer to iP1202 Design Procedure section on how
to set the OVP Trip threshold.



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