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TC4627 データシート(PDF) 6 Page - Microchip Technology

部品番号 TC4627
部品情報  Power CMOS Drivers With Voltage Tripler
PDF  18 Pages
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メーカー  MICROCHIP [Microchip Technology]
ホームページ  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC4627 データシート(HTML) 6 Page - Microchip Technology

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TC4626/TC4627
DS21426C-page 6
 2001-2012 Microchip Technology Inc.
3.1
BOOSTER FUNCTION
The voltage booster is an unregulated voltage tripler
circuit. The tripler consists of three sets of internal
switches and three external capacitors. S1a and S1b
charge capacitor C1 to VDD potential. S2a and S2b add
C1 potential to VDD input to charge C2 to 2 x VDD. S3a
and S3b add C1 potential to C2 to charge C3 to 3 x
VDD. The position of the switches is controlled by the
internal 4 phase clock.
FIGURE 3-3:
VOLTAGE BOOSTER
FIGURE 3-4:
POSITION OF SWITCHES
C3
C2
6
3
8
2
C1
S1a
S1b
GND
4
S2a
S2b
2 x VDD
3 x VDD, VBOOST
6
S3b
S3a
1
(4 to 6V)
VDD
+
+
+
Pin 2
Voltage
Pin 1
Voltage
3 x VDD
2 x VDD
VDD
2 x VDD
VDD
0
On
Off
S1
On
Off
S2
On
Off
S3
Pin 1 & 2 Waveforms



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