Hello. I have an LM317 in this configuration:
I have a superficial description of what this circuit, but my intension is to better understand and perhaps be able to explain the problem analytically.
By reading the datasheet I have seen that this requires an integrated voltage-Vout Vadj to 1.25V. Also attempts to minimize the output current from the ADJ pin. But how can I analyze everything?
Here is the description that I have the circuit:
"Regulator LM317 is configured as a constant current regulator. MOSFET Q3 hanges the current from LM317 to a voltage, which in turn sets a bias voltage at the gate of another MOSFET equal to Q3. The advantage here is that Q2 will automatically adjust the gate bias to the other MOSFET as needed to correct for ambient temperature effects."
Thanks
I have a superficial description of what this circuit, but my intension is to better understand and perhaps be able to explain the problem analytically.
By reading the datasheet I have seen that this requires an integrated voltage-Vout Vadj to 1.25V. Also attempts to minimize the output current from the ADJ pin. But how can I analyze everything?
Here is the description that I have the circuit:
"Regulator LM317 is configured as a constant current regulator. MOSFET Q3 hanges the current from LM317 to a voltage, which in turn sets a bias voltage at the gate of another MOSFET equal to Q3. The advantage here is that Q2 will automatically adjust the gate bias to the other MOSFET as needed to correct for ambient temperature effects."
Thanks