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參數(shù)資料
| 型號： | MC34063A |
| 廠商： | Analog Integrations Corporation |
| 英文描述： | Processor Supervisory Circuits with Power-Fail 8-MSOP-PowerPAD -40 to 85 |
| 中文描述： | 直流/直流轉(zhuǎn)換器控制電路 |
| 文件頁數(shù)： | 9/15頁 |
| 文件大?。?/td> | 1483K |
| 代理商： | MC34063A |
Calculation
Parameter
Step-Up
(Discontinuos mode)
V
out
+
V
F
V
in
(
min
)
V
in
(
min
)
V
sat
Step-Down
(Continuos mode)
V
out
+
V
F
V
in
(
min
)
V
sat
V
out
Voltage Inverting
(Discontinuos mode)
|
V
out
|
+
V
F
V
in
V
sat
t
on
/t
off
(t
on
+ t
off
)max
C
T
I
PK(switch)
R
SC
C
O
1/f
min
1/f
min
1/f
min
4.5x10
-5
t
on
2I
out(max)
[(t
on
/t
off
)+1]
0.3/I
PK(switch)
I
out
t
on
V
ripple
(
p
p
)
V
in
(
min
)
V
sat
I
PK
(
switch
)
4.5x10
-5
t
on
2I
out(max)
0.3/I
PK(switch)
I
PK
(
switch
)
(
t
on
+
t
off
)
8V
ripple
(
p
p
)
V
in
(
min
)
V
sat
V
out
I
PK
(
switch
)
4.5x10
-5
t
on
2I
out(max)
[(t
on
/t
off
)+1]
0.3/I
PK(switch)
I
out
t
on
V
ripple
(
p
p
)
V
in
(
min
)
V
sat
I
PK
(
switch
)
L(min)
t
on
(
max
)
t
on
(
max
)
t
on
(
max
)
NOTES:
V
sat
= Saturation voltage of the output switch
V
F
= Foward voltage drop of the output rectifier
THE FOLLOWING POWER SUPPLY CHARACTERISTICS MUST BE CHOSEN:
V
in
= Nominal input voltage
V
out
= Desired output voltage, |V
out
| = 1.25(1+R
2
/R
1
)
I
out
= Desired output current
f
min
= Minimum desired output switching frequency at the selected values of Vin and Io
V
ripple
= Desired peak to peak output ripple voltage. In practice, the calculaed capacitor value will and 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.
Step-up With External NPN Switch
MC34063A/E
9/15
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|---|---|
| MC34063A_02 | 制造商:AIC 制造商全稱:Analog Intergrations Corporation 功能描述:Industrial Standard, Universal DC/DC Converter |
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| MC34063A_10 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:1.5 A, Step−Up/Down/ Inverting Switching Regulators |
| MC34063A_12 | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:DC TO DC CONVERTER CONTROLLER |
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