International Rectifier IRDC3847-P1V2, User Manual, Page: 4 / 12

IRDC3847-P1V2
Confidential
This evaluation board is a preliminary version meant for the engineering evaluation of the IR3847. Based on the results of the
continuing evaluation, this board can evolve and change without notice
2/13/2012
4
Fig.
1:
Schematic
of
the
IR3847
evaluation
board
Single
point
of
c
onne
c
tion
b
e
tw
e
e
n
Po
w
e
r
Ground
a
n
d
S
igna
l
(
“a
na
log”
)
G
round
Vp
C2
1
N/
S
C2
2
N/
S
C1
4
0.
1u
F
Vre
f
R4
0
N/
S
PG
D
Vo Vo
M3
N/
S
R4
1
N/
S
BO
D
E
J
U
M
PER
2
L1
150nH
P
C
D
C
1
0
08-
R
15E
M
O
R1
4
N/
S
R4
4
0
Vo
u
t+
1
Vre
f
C5
0
N/
S
R1
0
0
Op
ti
on
al
"
1-b
it
V
I
D
"
ci
rc
ui
t
OC
S
e
le
c
t
4p
in jum
p
er
1
2
3
4
Fb
Vre
f
1
Vo
u
t
PG
D
P
U
Op
ti
on
al
Pr
e-
Bi
as
t
e
s
t
ci
rcu
it
C3
8
N/
S
Sc
tr
l
1
C5
4
N/
S
Sy
n
c
C4
0
N/
S
C4
1
N/
S
C2
5
0.
1u
F
C4
2
N/
S
C4
3
N/
S
Vp
R2
8
0
C2
6
10
nF
VPB
1
R2
1
N/
S
R1
9
39
.2
K
C4
4
N/
S
C4
5
N/
S
SW
s
1
C6
6
10
uF
C5 22
uF
R1
1K
C3 22
uF
R1
6 N/S
R4 84.
5
R2 2.
67K
C4 22
uF
C1
5
22
uF
R6
20
C1
6
22
uF
R3
1
0 oh
m
R8
0
C1
7
22u
F
+
C3
5
N/
S
C1
8
22
uF
R3
0
0 oh
m
C1
9
22
uF
PG
D
U1
IR
38
47
Vin
17
LGnd
11
Rt
/S
y
n
c
4
SW
22
Vc
c
18
Co
m
p
8
Vs
n
s
6
PG
n
d
26
OC
S
e
le
c
t
5
FB
7
Bo
o
t
2
PG
D
16
PVin
1
PGn d
10
RS-
12
RS
+
13
RS
o
9
SW
21
SW
23
SW
20
SW
24
SW
32
Vre f
14
Vp
15
Ena ble
3
PGn d
27
PGn d
29
SW
25
C2
0
22
uF
Sc
tr
l
C3
1
N/
S
C5
5
N/
S
Vs
n
s
C3
2
N/
S
C5
6
N/
S
C3
9
1u
F
C1
0
N/
S
C6 N/
S
Ceramic ca
p 16V 5X22uF 1206
6X22uF/805/6.3V
+1X22uF/805/6.3V (tra
nsient schematic)
25
V 330uF
PG
D
J
U
M
PER
2
R3
5
N/
S
R32 23
.2
K
Vc
c
-
1
+
C3
6
N/
S
R2
9
N/S
+
C3
4
N/
S
N/
S
Vo
D2
N/
S
1
2
+
C5
1
N/
S
Vr
e
f
D3 N/
S
1 2
PVin
Vs
n
s
R1
8
49
.9
K
+
C1 33
0uF
R3
3
0
C2
7
N/
S
C8
22
00p
F
R3
4
0
C2
4
0.
1u
F
C5
3
N/
S
Rt
/S
y
n
c
R9 23.
2K
C2 22
uF
C9
100
n
R1
5
23.
2K
Ag
n
d
1
C2
8
N/
S
Vo
u
t
R1
1
0
C2
9
N/
S
PG
D
P
U
PG
D
P
U
1
C3
0
N/
S
Rt
/S
y
n
c
V
o
_R
_P
R3 2.
61K
R4
3
N/
S
VC
C
Vo
u
t-
1
V
cc+
1
Fb
SW
PG
o
o
d
1
V
o
ut
_A
dj
1
C1
1
1
50p
F
R2
6
N/
S
R2
7
N/
S
V
o
_R
_N
C5
2
N/
S
C6
8
N/
S
Vin
1
C7 N/
S
R2
0
N/
S
Vo
u
t
Sy
n
c
1
En
a
b
le
1
R1
7
10K
VC
C
C3
7
0.
1u
F
Vp
PVin
+
1
PVin
-
1
Vp
1
VD
D
Q
1
C5
7
22
uF
C3
3
0.
1u
F