Output Voltage Sampling Circuit for Discontinuous Conduction Mode Flyback Pulse-Width Modulation Controller

被引：1
作者：
Shi, Ling-Feng [1 ]
Shi, Zhen-Bo [1 ]
Chen, Sen [1 ]
Xun, Jian-Hui [1 ]
机构：
[1] Xidian Univ, Sch Elect Engn, Inst Elect CAD, 2 South Tai Bai Rd, Xian 710071, Shaanxi, Peoples R China
来源：
JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS | 2016年 / 25卷 / 11期
关键词：
Pulse-width modulation; flyback converter; output voltage sampling circuit; rectifier diode current; secondary inductance discharge time; CONVERTER; IMPLEMENTATION;
D O I：
10.1142/S0218126616501401
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
Primary-side controlled pulse-width modulation (PWM) flyback converter has been widely used in low-power and low-voltage products for its simple structure and low cost. This paper presents a novel output voltage sampling circuit which considers the influence of the rectifier diode current on the output voltage sampling. The output voltage sampling circuit samples the output voltage at 85% of the secondary inductance discharge time T-dis of last cycle, which improves the accuracy of the output voltage sampling circuit. Besides, the circuit can also sample the secondary inductance discharge time T-dis. Finally, a chip has been fabricated in 0.6 mu m complementary metal-oxide semiconductor (CMOS) process, which is used in the presented output voltage sampling circuit in its internal circuit to simple output voltage and achieve constant output voltage.
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页数：15
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