| Citation: |
Ye Qiang, Lai Xinquan, Li Yanming, Yuan Bing, Chen Fuji. A Piecewise Linear Slope Compensation Circuit for DC-DC Converters[J]. Journal of Semiconductors, 2008, 29(2): 281-287.
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Ye Q, Lai X Q, Li Y M, Yuan B, Chen F J. A Piecewise Linear Slope Compensation Circuit for DC-DC Converters[J]. J. Semicond., 2008, 29(2): 281.
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A Piecewise Linear Slope Compensation Circuit for DC-DC Converters
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Abstract
To prevent sub-harmonic oscillation and improve the stability and load capacity of the system, a piecewise linear slope compensation circuit is designed.Compared with the traditional design, this circuit provides a compensation signal whose slope varies from different duty cycles at -40～85℃, and reduces the negative effect of slope compensation on the system’s load capacity and transient response.A current mode PWM Boost DC-DC converter employing this slope compensation circuit is implemented in a UMC 0.6μm-BCD process.The results indicate that the circuit works well and effectively, and the load capacity is increased by 20%.The chip area of the piecewise linear slope compensation circuit is 0.01mm2, which consumes only 8μA quiescent current, and the efficiency ranges up to 93%.-
Keywords:
- DC-DC converter,
- slope compensation,
- piecewise linear,
- duty cycle
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References
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Proportional views
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