DocumentCode :
3154936
Title :
Over-Temperature Protection by Adaptive Output Power Control
Author :
van Bezooijen, A. ; van Straten, F. ; Mahmoudi, Reza ; van Roermund, Arthur H. M.
Author_Institution :
Philips Semiconduct., Nijmegen
fYear :
2006
fDate :
10-12 Sept. 2006
Firstpage :
350
Lastpage :
352
Abstract :
Power amplifier transistors suffer from overheating when they operate under extreme conditions. To prevent destructive breakdown an adaptive output power control concept is proposed that makes use of the detected die temperature to limit the output power once a threshold level is crossed. Output power is limited by reducing the effective power control voltage and thereby avoids opposite actuation of the protection loop and that of the power control loop. For a supply voltage of 3.5 V and a nominal output power of 1.8 W the maximum die temperature is reduced from 143 degC to 112 degC when the output power is adaptively reduced from 32.1 dBm to 27.7 dBm for a VSWR of 4 and worst case mismatch phase
Keywords :
adaptive control; power amplifiers; power control; power transistors; 1.8 W; 143 to 112 degC; 3.5 V; adaptive output power control; destructive breakdown; over-temperature protection; power amplifier transistor; protection loop; Adaptive control; Detectors; Electric breakdown; Power amplifiers; Power control; Power generation; Programmable control; Protection; Temperature; Voltage; Adaptive control; power amplifiers; protection; temperature;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Technology, 2006. The 9th European Conference on
Conference_Location :
Manchester
Print_ISBN :
2-9600551-5-2
Type :
conf
DOI :
10.1109/ECWT.2006.280509
Filename :
4057512
Link To Document :
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