Load driving circuit, integrated circuit, DC-DC converter, and load driving method

A load driving circuit, comprising:

• switching circuits configured to carry out pulse-width modulation (PWM) control by turning currents of respective series circuits connected in parallel on or off, each of the series circuits including a plurality of loads connected in series, the switching circuits configured to turn a current of any one of the series circuits on or off according to a first timing and to turn a current of at least a different one of the series circuits on or off according to a second timing, the first timing being different from the second timing;
• and
• D flip-flops corresponding to respective series circuits in which currents are turned on or off at same timing,
• wherein a first D flip-flop of the D flip-flops is configured to receive a PWM signal,
• each of the D flip-flops are configured to receive a clock signal with a frequency N times greater than a frequency of the PWM signal, N being an integer greater than 1;
• D flip-flops of the D flip-flops following the first D flip-flop are configured to sequentially receive an output signal of the first D flip-flop;
• the switching circuits are configured to control the currents of the respective series circuits to be turned on or off based on output signals of the D flip-flops corresponding to the respective series circuits.

A load driving circuit, comprising:

• switching circuits configured to carry out pulse-width modulation (PWM) control by turning currents of respective series circuits connected in parallel on or off, each of the series circuits including a plurality of loads connected in series,
• wherein the load driving circuit is configured to receive a PWM signal, and a clock signal with an arbitrary frequency times greater than a frequency of the PWM signal, N being an integer,
• the “N” is greater than a number of the series circuits, and
• the switching circuits are configured to turn the currents of all the respective series circuits on or off according to different timings.