konrad_gom
Junior Member level 1
Hello,
I have two amplifiers:
https://www.skyworksinc.com/uploads/documents/SKY67100_396LF_201265I.pdf
https://www.asb.co.kr/datasheet/ASW114.pdf
1. Why thermal resistance differ so much? SKY67100_396LF - 80 0C/W; ASW114 - 321 0C/W.
2. According to calculations for 25 0C ambient temperature, Tj for
* SKY67100_396LF will be Tj=25 0C + 80 0C/W*4V*56mA=43 0C;
* ASW114 will be Tj=25 0C + 321 0C/W*3,2V*37mA=63 0C.
Do I understand proper, that in this case:
3. Tc (case temperature) will be about Tj?
4. just switched on ASW114 will be so hot (63 0C) even without any RF signal?
I have two amplifiers:
https://www.skyworksinc.com/uploads/documents/SKY67100_396LF_201265I.pdf
https://www.asb.co.kr/datasheet/ASW114.pdf
1. Why thermal resistance differ so much? SKY67100_396LF - 80 0C/W; ASW114 - 321 0C/W.
2. According to calculations for 25 0C ambient temperature, Tj for
* SKY67100_396LF will be Tj=25 0C + 80 0C/W*4V*56mA=43 0C;
* ASW114 will be Tj=25 0C + 321 0C/W*3,2V*37mA=63 0C.
Do I understand proper, that in this case:
3. Tc (case temperature) will be about Tj?
4. just switched on ASW114 will be so hot (63 0C) even without any RF signal?
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