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參數(shù)資料
| 型號(hào)： | TC1121EUA |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 100mA Charge Pump Voltage Converter with Shutdown |
| 中文描述： | 100mA的電荷泵電壓轉(zhuǎn)換器，具有關(guān)斷 |
| 文件頁(yè)數(shù)： | 7/14頁(yè) |
| 文件大?。?/td> | 442K |
| 代理商： | TC1121EUA |
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2002 Microchip Technology Inc.
DS21358B-page 7
TC1121
3.6
Combined Positive Supply
Multiplication and Negative
Voltage Conversion
Figure 3-4 shows this dual function circuit, in which
capacitors C1 and C2 perform pump and reservoir
functions to generate negative voltage. Capacitors C3
and C4 are the respective capacitors for multiplied
positive voltage. This particular configuration leads to
higher source impedances of the generated supplies
due to the finite impedance of the common
charge-pump driver.
FIGURE 3-4:
COMBINED POSITIVE MULTIPLER AND NEGATIVE CONVERTER
1
1
2
1, D2 = 1N4148
2
4
3
V
IN
+
UT
= (
2V
IN
)
–
)
–
(V
FD2
)
V
C1121
ND
SC
AP
AP
C
HDN
UT
N
HDN*
UT
=
V
IN
–
SHDN should be tied to V
IN
if
not used.
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