in power supply there are voltage mode and current mode and some has power mode ,my question is in power mode how the servo loop control the power,is he control the voltage and current in the same time or how ?
SO WHAT IS THE DIFFERENCE BETWEEN VOLTAGE MODE AND POWER MODEI assume it adjusts the voltage so that the product of the output voltage and current (power) stay constant (within the current and voltage limits of the supply). So it would have some type of multiplier to perform the multiplication of the output voltage and current.
"power mode" is when you use both current limit AND voltage limit at the same time on a power supply. It is not a fair/accurate description. I don't think good quality suppliers like Agilent, Tektronix use this term but I have seen it in the manuals of low-end power supplies.SO WHAT IS THE DIFFERENCE BETWEEN VOLTAGE MODE AND POWER MODE
If there is a true "Power Mode" in a supply it would adjust the voltage to keep the output power constant independent of load. The Voltage Mode keeps the output voltage constant independent of load.SO WHAT IS THE DIFFERENCE BETWEEN VOLTAGE MODE AND POWER MODE