quantumtangles
- Dec 19, 2012
- 153
- Joined
- Dec 19, 2012
- Messages
- 153
As I understand it, the essential requirements for a switching power supply are:
Gated oscillator (anywhere north of 100kHz) x 1
Operational amplifier x 1
Voltage reference
Resistors x 2 (voltage divider)
NPN (darlington pair) series pass transistors x 2
Filtering Caps x 2 for input and output
Catch diode x 1
Inductor x 1
Has anyone here actually built a switching power supply circuit using gated oscillators etc and if so, what is the trade off between using a super high frequency gated oscillator (to move packets around really quickly) and the downside of high frequency packet transference.
Is it simply the case that high frequency gated oscillators in the 'on' state result in fully saturated series pass transistor pairs where the respective bases are almost continually supplied with the required voltage to allow collector/emitter action (and therefore it consumes more electrical energy because it is in the 'on' state most of the time), or is it more subtle than this?
In other words, why not use a 1Ghz gated oscillator to move the packets around ever faster. Is there a downside to ever increasing packet speed, and if so, what is it?
Thanks in advance for any responses
Gated oscillator (anywhere north of 100kHz) x 1
Operational amplifier x 1
Voltage reference
Resistors x 2 (voltage divider)
NPN (darlington pair) series pass transistors x 2
Filtering Caps x 2 for input and output
Catch diode x 1
Inductor x 1
Has anyone here actually built a switching power supply circuit using gated oscillators etc and if so, what is the trade off between using a super high frequency gated oscillator (to move packets around really quickly) and the downside of high frequency packet transference.
Is it simply the case that high frequency gated oscillators in the 'on' state result in fully saturated series pass transistor pairs where the respective bases are almost continually supplied with the required voltage to allow collector/emitter action (and therefore it consumes more electrical energy because it is in the 'on' state most of the time), or is it more subtle than this?
In other words, why not use a 1Ghz gated oscillator to move the packets around ever faster. Is there a downside to ever increasing packet speed, and if so, what is it?
Thanks in advance for any responses
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