Configuration method for a power supply controller and a controller employing same

A DC-DC switching power converter controller for controlling a controller, the controller being packaged within an integrated circuit, the integrated circuit comprising a plurality of pins making external connections from the integrated circuit, the plurality of pins comprising:

• a voltage sense pin sensing the output voltage of the DC-DC switching power converter;
• a configuration pin and a first pulse width modulator (PWM) pin;
• the integrated circuit further comprising:
• an analog to digital converter converting the voltage sensed at the voltage sense pin to a digital sensed voltage;
• a first controller providing an output control signal in responsive to the digital sensed voltage;
• a first pulse width modulator responsive to the output control signal to provide a first PWM output signal at the first PWM pin;
• a non-volatile memory (NVM) storing at least four configuration tables, each configuration table in turn comprising values for at least four parameters employed by the first controller;
• a configuration pin connecting to a first end of a single configuration resistor, the second end of the configuration resistor being connectable to a ground voltage;
• a measurement circuit making a measurement of the resistance of the single configuration resistor at the configuration pin;
• a second controller using the resistance measurement of the single configuration resistor as a sole input to select a configuration table to be employed by the integrated circuit.