Pulse modulation control in a dc-dc converter circuit

A device, comprising:

• a pulse modulation switching logic configured to generate switching signals of a pulse modulator so as to generate a pulse modulated signal with the duty cycle of a next pulse period of the pulse modulated signal being controlled on the basis of a duty cycle control signal and the duration of an ongoing pulse of the pulse modulated signal being controlled on the basis of an interrupt signal;
• a first control loop configured to generate the duty cycle control signal on the basis of an output signal derived from the pulse modulated signal;
• and
• a second control loop configured to generate the interrupt signal in response to detecting a transient in the output signal, the duration of the ongoing pulse being adjusted by an adjustment value in response to the interrupt signal indicating the detected transient.

A device, comprising:

• a pulse modulation switching logic configured to generate switching signals of a pulse modulator so as to generate a pulse modulated signal with the pulse duration of the pulse modulated signal being controlled on the basis of a pulse duration control signal and the frequency of the pulse modulated signal being controlled on the basis of a frequency control signal;
• a first control loop configured to generate the pulse duration control signal on the basis of an output signal derived from the pulse modulated signal;
• and
• a second control loop configured to generate the frequency control signal on the basis of the output signal to control the frequency of the pulse modulated signal concurrently with the pulse duration of the pulse modulated signal.

A DC-DC converter circuit, comprising:

• a pulse modulator configured to generate, from a DC input signal, a pulse modulated signal with a first pulse modulation control parameter being controlled on the basis of a first control signal and a second pulse modulation control parameter being controlled on the basis of a second control signal;
• an output filter configured to generate a DC output signal from the pulse modulated signal;
• a first control loop configured to generate, on the basis of the output signal, the first control signal to control the first pulse modulation control parameter;
• and
• a second control loop configured to generate, on the basis of the output signal, the second control signal to control the second pulse modulation control parameter concurrently with the first pulse modulation control parameter.

A method, comprising:

• generating a pulse modulated signal with a first pulse modulation control parameter being controlled on the basis of a first control signal and a second pulse modulation control parameter being controlled on the basis of a second control signal;
• filtering the pulse modulated signal to generate an output signal;
• generating the first control signal on the basis of the output signal;
• generating the second control signal on the basis of the output signal;
• and
• applying the first control signal and the second control signal to concurrently control the first pulse modulation control parameter and the second pulse modulation control parameter.