服务器电源中的PFC控制芯片HA16141的应用
ADVANCED ENGINEERING TECHNOLOGY
ASTEC POWER
BAO’AN, CHINA
APPLYING PFC/PWM CHIP HA16141 TO SERVER PRODUCT
SS500
Prepared by : JieWu
Revised by : William Lee
Approved by :
Name Signature
PRE-xx
REV DATE Remark
Technical Report Page 1 07/14/03
ADVANCED ENGINEERING TECHNOLOGY
ASTEC POWER
BAO’AN, CHINA
REF. No. : Dxx-xxx
1 Schematics 3
1.1 Original Schematic With L4981 3
1.2 Updated Schematic With HA16141 4
1.3 Comparison Of Components Count 4
2 Power Factor And Efficiency About PFC 5
2.1 Power Factor Data 5
2.1.1 PFC Controlled by IC L4981 5
2.1.2 PFC Controlled by IC HA16141 5
2.1.3 Comparison of Power Factor 6
2.2 Efficiency Of PFC Stage 6
2.2.1 PFC Circuit Control By The PFC IC L4981 6
2.2.2 PFC Circuit Control By The PFC IC Of HA16141 7
2.2.3 Comparing Efficiency Of PFC Circuit 8
3 Functions Evaluation 8
3.1 PFC Start-Up Sequence With HA16141 8
3.2 Control Function 9
3.2.1 Supply Block 9
3.2.2 PWM Block 9
3.2.3 PFC Block 11
3.2.4 DC/DC Stage Enable 13
3.3 Protection Function 13
3.3.1 Auxiliary Overload Protection 14
3.3.2 PFC Overvoltage Protection 14
Technical Report Page 2 07/14/03
ADVANCED ENGINEERING TECHNOLOGY