MAX1720 查看數據表（PDF） - ON Semiconductor
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MAX1720 Datasheet PDF : 18 Pages
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MAX1720
1
6
OSC
+
+
Vin
+
2
5
+
3
4
Capacitors = 10 mF
Figure 28. Positive Output Voltage Tripler
Vout
+
A single device can be used to construct a positive voltage tripler. The output voltage is approximately equal to 3Vin minus
the forward voltage drop of each external diode. The performance characteristics for the above converter are shown below.
Note that curves A and C show the circuit performance with economical 1N4148 diodes, while curves B and D are with lower
loss MBRA120E Schottky diodes.
14.0
D
12.0
Curve
A
10.0
C
B
8.0
C
6.0
B
D
4.0
2.0
TA = 25°C
A
0
0
10
20
30
40
Iout, OUTPUT CURRENT (mA)
Figure 29. Tripler Load Regulation, Output Voltage vs. Output Current
Vin (V)
3.0
3.0
5.0
5.0
All Diodes
1N4148
Rout (W)
111
MBRA120E
97
1N4148
85
MBRA120E
75
+
1
6
OSC
Vin
+
2
3
5
+
100 k
4
−Vout
Capacitors = 10 mF
Figure 30. Load Regulated Negative Output Voltage
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