I am looking for Biasing circuits which can provide gate voltage in the range of -4V to -0.5V.
In the application note of AMPLEON AN-11130, there is a table mentioning the specifications of the circuit.
It is mentioned that "gate voltage adjustment" range is 700mV typical. As per note1, "Resistor values may have to be changed for part of range."
In the "6.4 Gate voltage adjustment" by adjusting resistor values of R13 and R14 the gate voltage can be trimmed.
Is it possible to get my gate voltage requirements by using this circuit?
"R21 determines the supply voltage at which operating VGS is applied" What is the meaning of this? I know that these resitors are being used for setting threshold voltage for the "FB" pin. When there is transition from low to high on FB pin thresold voltages, PGOOD generates high signal. How this will control VGS generation?