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Abstract Based on the AC/DC switching power supply PWM control chip operating principle, analysis of its major source of generated power, we propose two ways to reduce the chip power consumption, first, the use of current sources and current Shen way constitute a series of output driver circuits, CMOS circuits by eliminating the transient short-circuit turn-on phenomenon, reducing the power consumption of the circuit module second is the use of jump-week work pattern, so that the chip in the light load and no-load case, the lower the power switch switching losses.
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