步升型电源在为负载供电的同时也为电池充电 DESIGN SHOWCASE 1 ( P ) IC1 ( C ) IC1 IC1 R9 IC2 R13 V IN ( 5V ) SIGN Q4 5V IC2 Q5 R12 ( R9 CHARGE ON /OFF 5A R12 3V FAST/ TRICKLE CHARGE ) IC2 R9 ( 10-4 ( OUT ) Q3 Q4 ) A/D ……