Rohm TO-247-4L, Руководство по эксплуатации

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TO-247-4L Half-Bridge Evaluation Board
User’s Guide
©
2019 ROHM Co., Ltd.
No. 61UG047E Rev.001
August.2019
6
．
1 Positive Bias (VCC2) Adjustment
Isolated Flyback power supply transformers (TX1, TX101) are used to generate both positive and negative voltages. The MOSFET
drive voltage (positive bias) VCC2 is generated through a LDO Regulator
from the transformer’s positive output. The LDO Output
voltage is adjustable by adjusting the RV51 and RV151 resistor values. Turning the adjustable resistor in the clockwise direction
increases the output voltage. Please note that the setting range is from 10.35V to 20.56V, but the UVLO of the VCC2 operates at
11.5V (typical), therefore pay attention when reducing the voltage.
HS
LS
4
7
kΩ
1
/8
W
R
B1
6
8
VAM1
5
0
T
R
1
5
0
V
1
A
10uF
50V
3216
4
.7
u
F
35V
2012
R65
1
5
kΩ
22uF
50V
3216
0Ω
150Ω
3
/4
W
10uF
50V
3216
4.7uF
3
5
V
,2
0
1
2
T
F
Z
V
T
R2.
0
B
2
0
m
A
0
.5
W
150Ω
3
/4
W
1.
5kΩ
R7
D
58
4.7 kΩ,1 /8W
R57
C61
Z
D51
R6
8
R11
R60
R61
R12
C12
R13
C13
D1
D59
C63
R62
R58
TP
54
C64
0.4
7Ω
3
/4
W
A
GND
S
DX
/E
N
COM
P
RE
F
SW
P
GND
FB
V
IN
B
D7F
2
0
0
E
F
J
-L
B
E
2
05 08
01 04
U1
TF ZV TR15 B
20 mA 0 .5W
09
F
IN
1
5
kΩ
V
IN
S
E
NS
E
V
DD
CS
O
V
A
DJ
VSS
ON/O
F
F
V
O
UT
S
-1
9
7
0
0
A
0
0
A
-E8
05 08
01 04
U51
N
O
P
10
k
Ω
RV
5
1
1
3
2
R
B1
6
0
VAM
ｰ
6
0
T
R
6
0
V
1
A
R59
0
.4
7
u
F
16V
1608
10
0Ω
1/8
W
4.
7kΩ
1
/4
W
R
B1
6
0
MM
-40
4
0
V
1
A
R64
C60
C11
C6
2
1000pF
1608
2
.2
k
Ω
V
cc
C10
R8
33
kΩ
1
/1
0
W
15
k Ω
3.9
k Ω
R10
R9
0
Ω
0
.1
u
F
0
.1
u
F
Z
D1
C14
0
.1
u
F
4
.7
k
Ω
R63
1
/1
0
W
1
/8
W
NOP
C65 C66
10uF
50V
3216
N
O
P
N
O
P
10uF
50V
3216
6 5 3 2
10
13
9
E
E
2
2
2
5
04398
-T
2
5
6
8T
8T
6T
12
11
4
32T
TX1
1 7
8
14
L
ED
5
1
SML -D
12
P
8W
H
S
VE
E
Sele
c
t
1
p
in
側
:
0V
3
p
in
側
::
-2V
J
P
5
1
3 1
JP
5
2
TP
53
TP
52
V
CC2
G
N
D2
VEE2
Figure 9. Gate Drive Power Supply Circuit (HS side)