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TC4627MJA 데이터시트(PDF) 6 Page - Microchip Technology |
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TC4627MJA 데이터시트(HTML) 6 Page - Microchip Technology |
6 / 18 page 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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