Abstract: A controller includes a ramp circuit and control logic. The ramp circuit includes: ramp generation circuitry having a first control input and a first current output; ramp adjustment circuitry having a second control input and a second current output; current scaling circuitry having a first current input, a current sense output and an offset current output, the first current input coupled to the first and second current outputs; and ramp completion circuitry having a current sense input and a completion output, the current sense input coupled to the current sense output. The control logic has a third control input and first and second control outputs. The third control input is coupled to the completion output. The first control output is coupled to the first control input. The second control output is coupled to the second control input.