3842-series chip based PFM application circuit
A series, chip technology, applied in the field of PFM application circuit, can solve the problems of instability, instability, unstable work, etc., to achieve the effect of improving efficiency, working stability, and increasing work
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[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0025] See Figure 1-10 , A circuit based on the application of the controller chip 3842 series in the field of switching power supply technology, from the PWM working mode to the PFM working mode. See attached image 3 Circuit diagram, including 3842 integrated block IC1, resistor R4, resistor R14, capacitor C7, optocoupler U1. The internal circuit of the 3842 series is defined as a block diagram with 8 different function pins. The int...
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