Chanrong Jiang, Changchun Chai, Chenxi Han, Yintang Yang. A high performance adaptive on-time controlled valley-current-mode DC–DC buck converter[J]. Journal of Semiconductors, 2020, 41(6): 062402
- Journal of Semiconductors
- Vol. 41, Issue 6, 062402 (2020)
Fig. 1. Schematic of the AOT controlled buck converter.
Fig. 2. The adaptive on-time controller.
Fig. 3. Bode plot of closed loop after compensation.
Fig. 4. Structure diagram of the zero crossing detection module.
Fig. 5. The threshold voltage comparator.
Fig. 6. (Color online) Simulation results of constant frequency. (a) Varying load current. (b) Varying input voltage. (c) Varying output voltage.
Fig. 7. (Color online) The relationship of T s between traditional COT and AOT structure proposed in this paper. (a) Variable input voltage. (b) Variable output voltage.
Fig. 8. (Color online) Simulated load transient response (V o: 1.2 V, I L: 0.4 →1.2→0.4 A).
Fig. 9. (Color online) Output variation curve caused by load current variation.
Fig. 10. (Color online) Conversion efficiency versus load current at different output voltages.
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Table 1. Comparison results of transient performance between COT, PWM and AOT.
|
Table 2. Comparison results of different control methods.
|
Table 3. Performance summary.
Set citation alerts for the article
Please enter your email address
© Copyright 2018-2021 | Chinese Laser Press. All Rights Reserved 沪ICP备15018463号-20