The temperature coefficients of voltage reference and current reference circuits are 18ppm / and 36 . 2ppm / respectively . the combination of current - limited comparator and current - limited statemachine reduces the noises generated by transformer . the leading edge circuit could avoid ldmos premature shutdown 论文着重介绍了该单片开关电源电路中部分子模块:基准源电路、电流极限比较器电路、电流极限状态机电路、前沿闭锁电路和调节电路。