TC4627EOE データシートの表示（PDF） - TelCom Semiconductor, Inc
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TC4627EOE Datasheet PDF : 7 Pages
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POWER CMOS DRIVERS WITH VOLTAGE TRIPLER
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 capaci-
tor 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.
6
3 x VDD, VBOOST
C3
3
2 x VDD
C2
S2a
6
S3a
S3b
Pin 1 & 2 Waveforms
3 x VDD
PIN 2
VOLTAGE
2 x VDD
VDD
2 x VDD
PIN 1
VOLTAGE
VDD
0
8
(4 To 6V)
VDD
S1a
S2b
2
C1
1
S1b
GND
4
ON
S1
OFF
ON
S2
OFF
ON
S3
OFF
Voltage Booster
Position of Switches
1
TC4626
TC4627
2
3
4
5
6
7
TELCOM SEMICONDUCTOR, INC.
8
4-275
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