step15 设计优化.
二、设计举例 ( DESIGN EXAMPLE )
Step0. 相关规格取得 (Specification)
例: 60watts ADAPTER POWER MAIN TRANSFORMER
INPUT: 90 ~ 264 Vac 47 ~ 63 Hz ;
OUTPUT: DC 19V 3.16A Vcc = 12 VDC 0.1A
η≧ 83% f s = 70KHz Duty cylce over 50%