I'm designing a system that will allow paralleling of power supplies to increase the max current from the system... Essentially the board takes VDC in and will give +1/2VDC, -1/2VCD and a virtual ground...
Right now i'm biasing VDC at 1/2VDC with a voltage divider, then feeding that into the non-inverting inputs of an opamp... the output of the opamp is fed into the base/base junction of two BJT transistors... the feedback is taken from the output of the two transistors in a totom-pole config... See picture (Left only)
This works fine... the transistor will run hot because they're dissipating lots of power (1/2Vcc * Ice)
If I was to put this system in parallel... I'm sure there would be problem, the outputs would have a slightly different potential and the PSUs would fight each other...
I'm thinking that if the system can be hardware configurable, one as a master and one as a slave... the master taking Vref from it's own voltage divider and the slave a taking its voltage reference from the masters voltage divider... this may work... as both op-amps will have the same voltage reference and ideally they will keep the output at the correct voltage... does this make any sense?
Right now i'm biasing VDC at 1/2VDC with a voltage divider, then feeding that into the non-inverting inputs of an opamp... the output of the opamp is fed into the base/base junction of two BJT transistors... the feedback is taken from the output of the two transistors in a totom-pole config... See picture (Left only)
This works fine... the transistor will run hot because they're dissipating lots of power (1/2Vcc * Ice)
If I was to put this system in parallel... I'm sure there would be problem, the outputs would have a slightly different potential and the PSUs would fight each other...
I'm thinking that if the system can be hardware configurable, one as a master and one as a slave... the master taking Vref from it's own voltage divider and the slave a taking its voltage reference from the masters voltage divider... this may work... as both op-amps will have the same voltage reference and ideally they will keep the output at the correct voltage... does this make any sense?