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參數(shù)資料
| 型號(hào)： | A8483 |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | 1.2 MHz Step-up Converter for Display Bias Supply |
| 中文描述： | 1.2 MHz的升壓轉(zhuǎn)換器，用于顯示偏壓電源 |
| 文件頁數(shù)： | 7/9頁 |
| 文件大?。?/td> | 328K |
| 代理商： | A8483 |
A8483-DS, Rev. 1
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
1.2 MHz Step-up Converter for Display Bias Supply
A8483
7
V
O
11.0
11.2
11.4
11.6
11.8
12.0
12.2
12.4
12.6
12.8
13.0
2.5
3.5
4.5
5.5
V
IN
(V)
Line Regulation
V
OUT1
V
OUT2
I
OUT
(mA)
V
O
20
22
24
26
28
30
32
34
0
10
20
30
40
Load Regulation
V
OUT
= 32 V
V
OUT
= 25 V
20
22
24
26
28
30
32
34
0
20
40
60
80
100
I
OUT
(mA)
V
O
Load Regulation
V
OUT
= 32 V
V
OUT
= 25 V
A8483
SW
EN
4
GND
2
VIN
5
FB
3
C1
1 μF
L1
10 μH
1
D1
5 V
V
OUT
C2
1 μF / 50 V
R2
15 k
Ω
R1
768 k
Ω
for
V
OUT
=
32 V
604 k
Ω
for
V
OUT
=
25 V
Enable
32 V, 18 mA
25 V, 25 mA
V
SUPPLY
A8483
VIN
SW
EN
4
GND
2
FB
3
7.5 V
V
Z
C1
1 μF
C3
0.1 μF
L1
22 μH
1
5
D1
12 V
V
OUT
C2
1 μF / 50 V
R2
15 k
Ω
R1
768 k
Ω
for
V
OUT
=
32 V
604 k
Ω
for
V
OUT
=
25 V
Enable
32 V, 40 mA
25 V, 80 mA
Connect either V
Z
or V
BIAS
V
SUPPLY
5 V
V
BIAS
A8483
VIN
SW
EN
4
GND
2
FB
3
C1
1 μF
1
5
L1
10 μH
D1
D2
V
OUT1
+12 V
I
OUT1
+ I
OUT2
= 15 mA
V
OUT2
–12 V
C2
0.47 μF
C3
0.47 μF
C4
0.47 μF
R2
39 k
Ω
R1
732 k
Ω
Enable
Li-ion
2.5 Vto
5.5 V
V
SUPPLY
Figure 19. Load Regulation for LCD TV, Plasma TV Bias, FED Display, Varactor Diode Bias; V
= 12 V (circuit also shown in figure 4). The A8483
can operate with a V
from 0.9 to 18 V with a separate bias supply to operate the A8483 in the normal V
IN
range. The bias voltage can be supplied
by an external power supply, such as 3.3 or 5 V, or by using a suitable Zener diode, V
Z
, for V
SUPPLY
> 10 V.
Figure 17. Line Regulation Perfomance for Small LCD Bias Supply, I
OUT1
= I
OUT2
= 7.5 mA (circuit also shown in figure 2)
Figure 18.Load Regulation for LCD TV, Plasma TV Bias, FED Display, Varactor Diode Bias; V
SUPPLY
= 5 V (circuit also shown in figure 3)
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