DocumentCode
15360
Title
Self-Calibrated Knee Voltage Detector With 99.65% High Accuracy for AC Charger System in 0.5 
500 V UHV Process
Author
Chao-Chang Chiu ; Lin, Man ; Chih-Wei Chang ; Che-Hao Meng ; Hsiang-An Yang ; Ke-Horng Chen
Author_Institution
Inst. of Electr. Control Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Volume
61
Issue
10
fYear
2014
fDate
Oct. 2014
Firstpage
2786
Lastpage
2795
Abstract
The self-calibrated knee voltage detector (SC-KVD) for electrical isolation primary side charger applications is proposed. The removal of the feedback network which is used in conventional designs and occupies at least 30 mm2 can save PCB area up to around 11%. Besides, the SC-KVD can dynamically adjust the detection point to improve the accuracy to 99.65% compared to the prior arts. The test chip fabricated in 0.5 μm 500 V UHV process can be powered on directly by the AC source owing to the 500 V ultra-high voltage device. Hence, the battery charger can be made more compact and portable than it was and the battery life can be prolonged and guaranteed.
Keywords
battery chargers; isolation technology; power semiconductor devices; printed circuits; self-adjusting systems; semiconductor device testing; voltage measurement; AC charger system; AC source; PCB area; SC-KVD; UHV process; battery charger; battery life; electrical isolation primary side charger applications; feedback network; self-calibrated knee voltage detector; size 0.5 mum; test chip; ultra-high voltage device; voltage 500 V; Accuracy; Batteries; Detectors; Light emitting diodes; Resistance; Timing; Voltage control; Charger; constant current (CC); constant voltage (CV); deep green mode (DG); discontinuous conduction mode (DCM); electrical isolation; self-calibrated knee voltage detection (SC-KVD); voltage accuracy;
fLanguage
English
Journal_Title
Circuits and Systems I: Regular Papers, IEEE Transactions on
Publisher
ieee
ISSN
1549-8328
Type
jour
DOI
10.1109/TCSI.2014.2333683
Filename
6872608
Link To Document