參數(shù)資料
型號： TC1121EOAG
元件分類： 穩(wěn)壓器
英文描述： SWITCHED CAPACITOR CONVERTER, 200 kHz SWITCHING FREQ-MAX, PDSO8
封裝： SOIC-8
文件頁數(shù)： 12/14頁
文件大?。?/td> 497K
代理商： TC1121EOAG
2006 Microchip Technology Inc.
DS21358C-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 Multiplier and Negative Converter
C1
D1
D2
D1, D2 = 1N4148
4
3
6
8
5
2
C2
C4
C3
VIN
+
VOUT = (2VIN) –
(VFD1) – (VFD2)
TC1121
GND
OSC
CAP+
CAP–
FC
SHDN
VOUT
VIN
SHDN*
VOUT = VIN
–
*SHDN should be tied to VIN if not used.
+
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