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參數(shù)資料
| 型號(hào)： | APW34063K |
| 廠商： | Anpec Electronics Corporation |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | 抗輻射高效，5安培開(kāi)關(guān)穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 8/13頁(yè) |
| 文件大小： | 949K |
| 代理商： | APW34063K |
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Copyright
ANPEC Electronics Corp.
Rev. A.3 - May., 2005
APW 34063
www.anpec.com.tw
8
Calculation
Set-Up
Step-Down
V
out
+ V
F
V
in(min)
- V
sat
- V
out
Voltage-Inverting
Iv
out
I + V
F
V
in
- V
sat
1
f
t
on
/ t
off
V
out
+ V
F
- V
in(min)
V
in(min)
- V
sat
1
f
t
on
+ t
off
t
off
t
on
C
T
(t
on
+ t
off
) - t
off
4.0 x 10
-5
t
on
2I
out(max)
(
t
on
(t
on
+ t
off
) - t
off
4.0 x 10
-5
t
on
(t
on
+ t
off
) - t
off
4.0 x 10
-5
t
on
2I
out(max)
(
t
on
I
pk(switch)
2I
out(max)
R
sc
0.3 / I
pk(switch)
0.3 / I
pk(switch)
0.3 / I
pk(switch)
L
(min)
V
in(min)
- V
Sat
I
pk(switch)
V
in(min)
- V
Sat
- V
out
I
pk(switch)
I
pk(switch)
(t
on
+ t
off
)
8V
ripple(pp)
V
in(min)
- V
Sat
I
pk(switch)
C
O
I
out
t
on
V
ripple(pp)
I
out
t
on
V
ripple(pp)
t
on
+ t
off
t
on
t
off
+1
t
on
+ t
off
t
on
t
off
+1
t
on
+ t
off
t
on
t
off
+1
)
t
on(max)
)
t
on(max)
)
t
on(max)
t
off
+1
)
t
off
+1
)
1
f
9
9
Design Formula Table
V
sat
= Saturation voltage of the output switch.
V
F
= Forward voltage drop of the output rectifier.
The following power supply characteristics must be chosen :
V
in
- Nominal input voltage.
V
out
- Desired output voltage, IV
out
I = 1.25
I
out
- Desired output current.
f
min
- Minimum desired output switching frequency at the selected values of Vin and Io.
V
ripple(pp)
- Desired peak-to-peak output ripple voltage. In practice, the calculated capacitor value will need
to be increased due to its equivalent series resistance and board layout. The ripple voltage should
be kept to a low value since it will directly affect the line and load regulation.
+
1
2
R
R
1
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