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creepage and clearance basics: You also have to work on the maximum possible voltage NOT nominal figures. I would recomend using pollution degree 3, its better to be safe than sorry.
Calculating Creepage and Clearance Early Avoids
Calculating Creepage and Clearance Early Avoids
It is 70 °C, but we don't know the measuring cricumstances, so it is hard to judge whether that is too hot or still OK.
Hi!
Has carried on the destructive test to the LM3886 power amplifier!
a. 4 ohms loads.
b.Each LM3886 quiescent current is 100mA
c.The output is 60W.
d.The time is from the morning to 9 o'clock to 10:00 pm
e.Temperature control about 70 degree C, on highest to 72 degree C.
f.The indoor temperature is 26 degree C.
Test result:
LM3886 all normal, does not have any fluctuation.
My English is poor, I say it in Chinese.
我对LM3886 IC功放进行了破坏性的测试。
a.输出端加4欧假负载
b.每管的静态电流为100mA, 加起来在400mA左右
c.只安装了均热片（没有安装到机箱）
d.音源是CD，音量开到一半大
e.测试时间为早到9点到晚上10点
f.工作温度稳定在70度左右，最高上到72度。
g.测试环境温度为26度
在如此高温测试下，依然正常工作！！！
Has carried on the destructive test to the LM3886 power amplifier!
a. 4 ohms loads.
b.Each LM3886 quiescent current is 100mA
c.The output is 60W.
d.The time is from the morning to 9 o'clock to 10:00 pm
e.Temperature control about 70 degree C, on highest to 72 degree C.
f.The indoor temperature is 26 degree C.
Test result:
LM3886 all normal, does not have any fluctuation.
My English is poor, I say it in Chinese.
我对LM3886 IC功放进行了破坏性的测试。
a.输出端加4欧假负载
b.每管的静态电流为100mA, 加起来在400mA左右
c.只安装了均热片（没有安装到机箱）
d.音源是CD，音量开到一半大
e.测试时间为早到9点到晚上10点
f.工作温度稳定在70度左右，最高上到72度。
g.测试环境温度为26度
在如此高温测试下，依然正常工作！！！
Last edited:
This is English language site - Here is post #28 via Google Translate - 
LM3886 IC amplifier I had destructive testing.
a. outputs plus 4 Europe-load
b. The static current of each tube 100mA, 400mA or so together in the
c. only the installed heat spreader (not installed in the chassis)
d. the source is CD, open to half the size of the volume
e. testing time for the early 9 am to 10 pm
f. temperature stabilized at about 70 degrees, the maximum up to 72 degrees.
g. test environment temperature of 26 degrees
In such a high temperature test, it still works! ! !
LM3886 IC amplifier I had destructive testing.
a. outputs plus 4 Europe-load
b. The static current of each tube 100mA, 400mA or so together in the
c. only the installed heat spreader (not installed in the chassis)
d. the source is CD, open to half the size of the volume
e. testing time for the early 9 am to 10 pm
f. temperature stabilized at about 70 degrees, the maximum up to 72 degrees.
g. test environment temperature of 26 degrees
In such a high temperature test, it still works! ! !
This is English language site - Here is post #28 via Google Translate -
LM3886 IC amplifier I had destructive testing.
a. outputs plus 4 Europe-load
b. The static current of each tube 100mA, 400mA or so together in the
c. only the installed heat spreader (not installed in the chassis)
d. the source is CD, open to half the size of the volume
e. testing time for the early 9 am to 10 pm
f. temperature stabilized at about 70 degrees, the maximum up to 72 degrees.
g. test environment temperature of 26 degrees
In such a high temperature test, it still works! ! !
Thanks!
But google translates content nobody can understand!!!
After installing the outer covering, the temperature will drop, the outer covering will be a radiator.
Unless it has fins and is quite thick, it won't do as much as you think. It will just increase the thermal mass so it will be a little slower to heat up and radiate a small amount from the case but not enough IMO.
G²
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