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参数资料
| 型号： | A8483EEKTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 8/10页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 0.35A 5MLP |
| 标准包装： | 1 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 可调至 35V |
| 输入电压： | 2.5 V ~ 10 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1.2MHz |
| 电流 - 输出： | 350mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 5-WDFN 裸露焊盘 |
| 包装： | 剪切带 (CT) |
| 供应商设备封装： | 5-MLP/TDFN（3x3） |
| 其它名称： | 620-1101-1 |
A8483
I OUT1 + I OUT2 = 15 mA
1.2 MHz Step-up Converter
for Display Bias Supply
5
VIN
L1
10 μH
1
SW
D1
V OUT1
+12 V
13.0
12.8
Line Regulation
V SUPPLY
C1
1 μF
A8483
R1
732 k Ω
C2
0.47 μF
C3
0.47 μF
12.6
12.4
12.2
V OUT1
EN
GND
FB
12.0
Li-ion
2.5 V to
5.5 V
4
Enable
2
3
R2
39 k Ω
D2
V OUT2
–12 V
C4
0.47 μF
11.8
11.6
11.4
11.2
11.0
V OUT2
2.5
3.5
4.5
5.5
V IN (V)
Figure 17. Line Regulation Perfomance for Small LCD Bias Supply, I OUT1 = I OUT2 = 7.5 mA (circuit also shown in figure 2)
32 V, 18 mA
V OUT
25 V, 25 mA
Load Regulation
V SUPPLY C1
1 μF
5V
5
VIN
EN
4
L1
10 μH
A8483
GND
2
1
SW
FB
3
D1
R1
768 k Ω for
V OUT = 32 V
604 k Ω for
V OUT = 25 V
C2
1 μ μF / 50 V
34
32
30
28
26
24
V OUT = 32 V
V OUT = 25 V
Enable
R2
15 k Ω
22
20
0
10
20
30
40
I OUT (mA)
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)
32 V, 40 mA
Connect either V Z or V BIAS
L1
V OUT
25 V, 80 mA
34
Load Regulation
V SUPPLY
12 V
C1
1 μF
V Z
7.5 V
V BIAS
5
VIN
EN
4
22 μH
A8483
GND
2
1
SW
FB
3
D1
R1
768 k Ω for
V OUT = 32 V
604 k Ω for
V OUT = 25 V
C2
1 μ μF / 50 V
32
30
28
26
24
V OUT = 32 V
V OUT = 25 V
5V
Enable
22
C3
0.1 μF
R2
15 k Ω
20
0
20
40
60
80
100
I OUT (mA)
Figure 19. Load Regulation for LCD TV, Plasma TV Bias, FED Display, Varactor Diode Bias; V SUPPLY = 12 V (circuit also shown in figure 4). The A8483
can operate with a V SUPPLY 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.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
7
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