Abstract
The conventional fixed-frequency pulse width modulated control scheme for power converters is commonly used with current-mode control circuit instead of voltage-mode control circuit. However, adaptive on-time control circuits can achieve a faster transient response than the pulse width modulated control scheme because the former uses a comparator to control the on-time generator without an error amplifier. Thus, adaptive on-time control circuits do not exhibit system loop delay from the error amplifier. However, adaptive on-time control circuits do not meet the requirements of output equipment or devices to achieve a faster transient response. This chapter shows that adaptive on-time control circuits with a quick dynamic response can achieve a faster transient response than those without a quick dynamic response for buck converters. Implementing a quick dynamic response with constant frequency on-time control circuit for buck converter is showed in this chapter. The concept uses the quick dynamic response to filter Vout at the load transient to change the on-time width dynamically, preventing Vout from dropping markedly. Finally, 12 V input voltage, 3.3 V output voltage, and 60 W output power with a quick dynamic response are implemented to achieve afast load transient response for the integrated circuit of the proposed constant frequency constant on-time control circuit for buck converter. Experimental and SIMPLIS simulation results are compared to verify the viability and superiority of the proposed approach
| Original language | English |
|---|---|
| Title of host publication | Power Systems |
| Publisher | Springer Verlag |
| Pages | 123-144 |
| Number of pages | 22 |
| Edition | 9789811070037 |
| DOIs | |
| Publication status | Published - 2018 Jan 1 |
Publication series
| Name | Power Systems |
|---|---|
| Number | 9789811070037 |
| ISSN (Print) | 1612-1287 |
| ISSN (Electronic) | 1860-4676 |
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All Science Journal Classification (ASJC) codes
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering
Cite this
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Adaptive On-time Control Circuit for Buck Converters. / Chen, Wen Wei; Chen, Jiann-Fuh.
Power Systems. 9789811070037. ed. Springer Verlag, 2018. p. 123-144 (Power Systems; No. 9789811070037).Research output: Chapter in Book/Report/Conference proceeding › Chapter
TY - CHAP
T1 - Adaptive On-time Control Circuit for Buck Converters
AU - Chen, Wen Wei
AU - Chen, Jiann-Fuh
PY - 2018/1/1
Y1 - 2018/1/1
N2 - The conventional fixed-frequency pulse width modulated control scheme for power converters is commonly used with current-mode control circuit instead of voltage-mode control circuit. However, adaptive on-time control circuits can achieve a faster transient response than the pulse width modulated control scheme because the former uses a comparator to control the on-time generator without an error amplifier. Thus, adaptive on-time control circuits do not exhibit system loop delay from the error amplifier. However, adaptive on-time control circuits do not meet the requirements of output equipment or devices to achieve a faster transient response. This chapter shows that adaptive on-time control circuits with a quick dynamic response can achieve a faster transient response than those without a quick dynamic response for buck converters. Implementing a quick dynamic response with constant frequency on-time control circuit for buck converter is showed in this chapter. The concept uses the quick dynamic response to filter Vout at the load transient to change the on-time width dynamically, preventing Vout from dropping markedly. Finally, 12 V input voltage, 3.3 V output voltage, and 60 W output power with a quick dynamic response are implemented to achieve afast load transient response for the integrated circuit of the proposed constant frequency constant on-time control circuit for buck converter. Experimental and SIMPLIS simulation results are compared to verify the viability and superiority of the proposed approach
AB - The conventional fixed-frequency pulse width modulated control scheme for power converters is commonly used with current-mode control circuit instead of voltage-mode control circuit. However, adaptive on-time control circuits can achieve a faster transient response than the pulse width modulated control scheme because the former uses a comparator to control the on-time generator without an error amplifier. Thus, adaptive on-time control circuits do not exhibit system loop delay from the error amplifier. However, adaptive on-time control circuits do not meet the requirements of output equipment or devices to achieve a faster transient response. This chapter shows that adaptive on-time control circuits with a quick dynamic response can achieve a faster transient response than those without a quick dynamic response for buck converters. Implementing a quick dynamic response with constant frequency on-time control circuit for buck converter is showed in this chapter. The concept uses the quick dynamic response to filter Vout at the load transient to change the on-time width dynamically, preventing Vout from dropping markedly. Finally, 12 V input voltage, 3.3 V output voltage, and 60 W output power with a quick dynamic response are implemented to achieve afast load transient response for the integrated circuit of the proposed constant frequency constant on-time control circuit for buck converter. Experimental and SIMPLIS simulation results are compared to verify the viability and superiority of the proposed approach
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U2 - 10.1007/978-981-10-7004-4_5
DO - 10.1007/978-981-10-7004-4_5
M3 - Chapter
AN - SCOPUS:85040013780
T3 - Power Systems
SP - 123
EP - 144
BT - Power Systems
PB - Springer Verlag
ER -