the charger/ adapter application includes the two functional sections of "primary side switch" and “secondary side synchronous rectification"
● primary side switch:
1)common charger: drive by high voltage dmos
2)quick charger: the main switch below 18w adopts planar mos, and that over 18w adopts sj mos
● synchronous rectification:driven by medium and low voltage mos, sgt mos is preferred
secondary side sampling function of the charger/ adaptor: driven by reference power supply circuit
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