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