초록 ▼

A DC-to-DC switching power supply (12) receives a DC biased power signal at a first input (14), a control signal at its control input (16) and produces an output DC voltage at its output terminal (20). A power supply controller (30) compares the produced output signal Vout with an input reference si

A DC-to-DC switching power supply (12) receives a DC biased power signal at a first input (14), a control signal at its control input (16) and produces an output DC voltage at its output terminal (20). A power supply controller (30) compares the produced output signal Vout with an input reference signal Vref. The reference signal is an analog signal which may be produced via digital-to-analog converter (34) which converts a digital input command into a corresponding analog signal Vref. The resulting error signal is then passed through a proportional gain block 36 and an integral gain block (38). A signal proportional to the differential of the output voltage is passed through a differential gain block (44). The outputs from the proportional gain block (36) integrator gain block (38) differential gain block (44) are summed in the second summer (40) and applied as the input to a delta-sigma converter (42). The output from delta-sigma (42) then constitutes a fixed-width pulse stream of predetermined sequence such that, when applied to the control input (16) of the switching power supply (12), the power supply produces a DC output signal Vout at its output terminal (20) which is determined by the reference signal Vref.

대표청구항 ▼

A DC-to-DC converter comprising: a switching power supply having a power input terminal adapted to connect to a source of DC power, a control terminal for receiving a control input signal and an output terminal for producing a controlled output DC signal having a value which is controlled by the con

A DC-to-DC converter comprising: a switching power supply having a power input terminal adapted to connect to a source of DC power, a control terminal for receiving a control input signal and an output terminal for producing a controlled output DC signal having a value which is controlled by the control signal received at said control terminal; and a controller having a first input coupled to said switching power supply output terminal, a second input adapted to receive a reference signal, and an output coupled to said switching power supply control terminal, said controller producing fixed width output pulses as a function of the relationship between the signals at its first and second inputs, such that the switching power supply produced controlled output DC signal is maintained at a value determined by said received reference signal, said controller further comprising: first summing means for producing an output error signal representative of the difference between said switching power supply produced controlled output DC signal and said received reference signal; proportional gain means for scaling said error signal by a proportional gain factor to produce a proportional feedback signal; integrating means for integrating and scaling said error signal by an integral gain factor to produce an integrated feedback signal; second summing means for summing said proportional feedback signal and said integrated feedback signal; and said controller including means for producing said fixed width output pulses as a function of both of said feedback signals.