555 bipolar power conversion circuit

Published:2011/7/21 3:09:00 Author:Ecco | Keyword: 555, bipolar, power conversion | From:SeekIC

As shown in Figure 9-3, the conversion circuit includes the pulse oscillator and bipolar rectifier circuit. It is used to transfer a group of power supply into two groups of ± 12V DC voltage source in digital circuits and analog mixed circuit board with op amp. The circuit can no longer be set two voltage sources. 555 and R1, R2, C3 form a multivibrator which is in non-steady state, the oscillation frequency f = 1.44 / (R1 +2 R2) C3, the frequency of the icon parameter is about 100kHz, duty cycle is about 70%; the other way gets + 12V voltage. Load current can be up to tens of mA for 2 to 3 op amps.



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