IR3871MPBF Просмотр технического описания (PDF) - International Rectifier
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производитель
IR3871MPBF
International Rectifier
IR3871MPBF Datasheet PDF : 21 Pages
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IR3871MPBF
TYPICAL APPLICATION CIRCUIT
Demoboard Schematic: VOUT = 1.05V, Fs = 300kHz
V CC
R2
10 K
T P4
EN
SW1
E N / FCCM
+3 .3V
T P3
FCCM
R1
op en
EN
FCCM
V SW
R4
10 .5K
ISE T
+3 .3V
R5
10 K
T P11
P GOOD
C5
op en
P GOOD
T P13
SS
FB
SS
C20
0.1uF
V IN
R3
20 0K
+V i n1s
T P20
+V i n1s
C4
0.22u F
U1
IR3 871
V SW
L1
1.5uH
1
NC
2
ISE T
3
P GOOD
4
GND1
IR3871
5
FB
6
SS
7
NC1
12
P HA SE
R6
op en
C13
op en
T P22
+V sws
2
5
T P12
V SWS
T P21
-Vs ws
T P14
+3 .3V
+3 .3V
T P26
A GND
T P16
V CC
T P17
P GND
V CC
C23
op en
+V dd2 s
-Vd d2s
C21
1u F
C25
1u F
-Vo ut1 s
+V dd1 s
C22
op en
-Vd d1s
T P15
-Vo ut1 s
T P25
-Vi n1s
C14
op en
T P19
FB
+V i ns
T P1
V INS
T P2
V IN
C1
C2
+ C3
1u F
22 uF
68 uF
V OUT
T P9
+V out1s
-Vi ns
T P6
P GNDS
T P5
P GND
C6
op en
C7
op en
C8
op en
C9
33 0uF
C10
47 uF
C11
op en
T P23
+V sws
T P7
V OUT
2
C12
0.1uF
5 T P8
V OUTS
T P24
+V sws
T P10
P GND
C15
op en
C16
op en
C17
op en
C18
op en
C19
op en
C26
op en
C27
op en
R7
2.80K
C24
op en
R11
op en
R12
op en
T P18
V OLT A GE S E NS E
R8
R13
R14
2.55K
op en
op en
R9
0
R10
op en
Figure 7. Typical Application Circuit for VOUT = 1.05V, Fs = 300kHz
Demoboard Bill of Materials
Quantity Reference
1 C4
3 C1, C21, C25
1 C2
1 C3
1 C9
1 C10
2 C12, C20
1 L1
2 R2, R5
1 R9
1 R3
1 R4
1 R7
1 R8
1 SW1
1 U1
Value
0.22uF
1uF
22uF
68uF
330uF
47uF
0.1uF
1.5uH
10K
0
200K
10.5K
2.8K
2.55K
SPST
IR3871
Description
CAP,CER,0.22uF,50V,10%,X7R,0603
CAP,CER,1.0uF,25V,X7R,0603
CAP,22uF,25V,CERAMIC,X5R,1210
CAP,68uF,25V,ELECT,FK,SMD
POSCAP, 330uF, 2.5V, SMD
CAP,CER,47uF,6.3V,X5R,0805
CAP,CER,0.1uF,50V,10%,X7R,0603
INDUCTOR, 1.5uH, 11A, 6.7mOhm,SMD
RES,10.0K,OHM,1/10W,1%,0603,SMD
RES,0.0,OHM,1/10W,1%,0603,SMD
RES,200K,OHM,1/10W,1%,0603,SMD
RES,10.5K,OHM,1/10W,1%,0603,SMD
RES,2.8K,OHM,1/10W,1%,0603,SMD
RES,2.55K,OHM,1/10W,1%,0603,SMD
SWITCH, DIP, SPST, SMT
5mm x 6mm QFN
Manufacturer
Murata Electronics
Murata Electronics
Panasonic
Panasonic
Sanyo
TDK
TDK
CYNTEC
Vishay/Dale
Vishay/Dale
Vishay/Dale
Vishay/Dale
Vishay/Dale
Vishay/Dale
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IR
Part-Number
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SD02H0SK
IR3871MPBF
8
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