Power-based thermal limits for micro-speaker protection algorithms
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C. Peng, Y. Shi, B. Yan, L. Wu, Z. Chen, C. Salvador, and D. Liu, "Power-based thermal limits for micro-speaker protection algorithms," Engineering Brief 594, (2020 May.). doi:
C. Peng, Y. Shi, B. Yan, L. Wu, Z. Chen, C. Salvador, and D. Liu, "Power-based thermal limits for micro-speaker protection algorithms," Engineering Brief 594, (2020 May.). doi:
Abstract: The increasing demand for high-definition audio in mobile platforms is creating the necessity of adequate operation limits for smart amplifiers to safely maximize the power delivered to micro-speakers. The maximum voice-coil temperature (Tmax) is an important parameter for protection algorithms that prevent damage. Standard tests used by micro-speaker suppliers to specify Tmax provide a conservative estimate that depends on the voice-coil materials. Other tests consider the rated noise power, a specification obtained by rigorous lifetime tests. This paper investigates the thermal limits when micro-speakers operate at their specified rated power. These power-based thermal limits are contrasted with values of Tmax specified in datasheets. The evidence found is used to recommend procedures to measure power-based thermal limits that avoid over-protection.
@article{peng2020power-based,
author={peng, congcong and shi, yun and yan, bixiang and wu, lianjun and chen, zhipeng and salvador, césar and liu, deheng},
journal={journal of the audio engineering society},
title={power-based thermal limits for micro-speaker protection algorithms},
year={2020},
volume={},
number={},
pages={},
doi={},
month={may},}
@article{peng2020power-based,
author={peng, congcong and shi, yun and yan, bixiang and wu, lianjun and chen, zhipeng and salvador, césar and liu, deheng},
journal={journal of the audio engineering society},
title={power-based thermal limits for micro-speaker protection algorithms},
year={2020},
volume={},
number={},
pages={},
doi={},
month={may},
abstract={the increasing demand for high-definition audio in mobile platforms is creating the necessity of adequate operation limits for smart amplifiers to safely maximize the power delivered to micro-speakers. the maximum voice-coil temperature (tmax) is an important parameter for protection algorithms that prevent damage. standard tests used by micro-speaker suppliers to specify tmax provide a conservative estimate that depends on the voice-coil materials. other tests consider the rated noise power, a specification obtained by rigorous lifetime tests. this paper investigates the thermal limits when micro-speakers operate at their specified rated power. these power-based thermal limits are contrasted with values of tmax specified in datasheets. the evidence found is used to recommend procedures to measure power-based thermal limits that avoid over-protection.},}
TY - paper
TI - Power-based thermal limits for micro-speaker protection algorithms
SP -
EP -
AU - Peng, Congcong
AU - Shi, Yun
AU - Yan, Bixiang
AU - Wu, Lianjun
AU - Chen, Zhipeng
AU - Salvador, César
AU - Liu, Deheng
PY - 2020
JO - Journal of the Audio Engineering Society
IS -
VO -
VL -
Y1 - May 2020
TY - paper
TI - Power-based thermal limits for micro-speaker protection algorithms
SP -
EP -
AU - Peng, Congcong
AU - Shi, Yun
AU - Yan, Bixiang
AU - Wu, Lianjun
AU - Chen, Zhipeng
AU - Salvador, César
AU - Liu, Deheng
PY - 2020
JO - Journal of the Audio Engineering Society
IS -
VO -
VL -
Y1 - May 2020
AB - The increasing demand for high-definition audio in mobile platforms is creating the necessity of adequate operation limits for smart amplifiers to safely maximize the power delivered to micro-speakers. The maximum voice-coil temperature (Tmax) is an important parameter for protection algorithms that prevent damage. Standard tests used by micro-speaker suppliers to specify Tmax provide a conservative estimate that depends on the voice-coil materials. Other tests consider the rated noise power, a specification obtained by rigorous lifetime tests. This paper investigates the thermal limits when micro-speakers operate at their specified rated power. These power-based thermal limits are contrasted with values of Tmax specified in datasheets. The evidence found is used to recommend procedures to measure power-based thermal limits that avoid over-protection.
The increasing demand for high-definition audio in mobile platforms is creating the necessity of adequate operation limits for smart amplifiers to safely maximize the power delivered to micro-speakers. The maximum voice-coil temperature (Tmax) is an important parameter for protection algorithms that prevent damage. Standard tests used by micro-speaker suppliers to specify Tmax provide a conservative estimate that depends on the voice-coil materials. Other tests consider the rated noise power, a specification obtained by rigorous lifetime tests. This paper investigates the thermal limits when micro-speakers operate at their specified rated power. These power-based thermal limits are contrasted with values of Tmax specified in datasheets. The evidence found is used to recommend procedures to measure power-based thermal limits that avoid over-protection.
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