參數(shù)資料
型號(hào)： TC1220
廠商： Microchip Technology Inc.
元件分類(lèi)： 基準(zhǔn)電壓源/電流源
英文描述： Switched Capacitor Voltage Converters with Shutdown in SOT Packages
中文描述： 開(kāi)關(guān)電容電壓轉(zhuǎn)換器與關(guān)機(jī)采用SOT封裝
文件頁(yè)數(shù)： 7/16頁(yè)
文件大?。?/td> 482K
代理商： TC1220
2002 Microchip Technology Inc.
DS21366B-page 7
TC1219/TC1220
4.7
Cascading Devices
Two or more TC1219/TC1220 can be cascaded to
increase output voltage (Figure 4-4). If the output is
lightly loaded, it will be close to (-2 x V
IN
) but will droop
at least by R
OUT
of the first device multiplied by the I
Q
of the second. It can be seen that the output resistance
rises rapidly for multiple cascaded devices.
4.8
Paralleling Devices
To reduce the value of R
OUT
, multiple TC1219/
TC1220
’
s can be connected in parallel (Figure 4-5).
The output resistance will be reduced by a factor of N
where N is the number of TC1219/TC1220. Each
device will require its own pump capacitor (C1), but all
devices may share one reservoir capacitor (C2).
However, to preserve ripple performance the value of
C2 should be scaled according to the number of
paralleled TC1219/TC1220.
FIGURE 4-4:
CASCADING MULTIPLE DEVICES TO INCREASE OUTPUT VOLTAGE
FIGURE 4-5:
PARALLELING MULTIPLE DEVICES TO REDUCE OUTPUT RESISTANCE
C1
C1
C2
6
5
6
5
4
3
4
1
2
2
1
3
C2
V
IN
V
OUT
V
OUT
= -nV
IN
TC1219
TC1220
TC1219
TC1220
. . .
. . .
SHDN
SHDN
V
IN
"1"
"n"
+
+
+
+
C1
C1
6
5
5
4
3
4
1
2
2
1
3
C2
V
OUT
V
OUT
= -V
IN
R
OUT
= R
OUT
OF SINGLE DEVICE
NUMBER OF DEVICES
V
IN
TC1219
TC1220
TC1219
TC1220
. . .
. . .
SHDN
SHDN
Shutdown
Control
6
V
IN
+
+
+
"1"
"n"
相關(guān)PDF資料
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TC1221 制造商:MICROCHIP 制造商全稱(chēng):Microchip Technology 功能描述:High Frequency Switched Capacitor Voltage Converters with Shutdown in SOT Packages
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