Chapter 7 Tutorial
Reliability
148
Reliability
Reliability of electronic semiconductor equipment depends heavily on the
temperature of the components. The lower the temperature of the
components, the better the reliability . The Ag ilent E3633A and Ag ilent E3634A
power supplies incorporate circuitry to reduce the int ernal power dissipation
of the power supply and therefore reduce t he internal heat of the power supply .
Maximum internal power dissipation occurs at maximum current. The internal
power dissipation further increases as the output voltage is lowered. A fan
internal to the power supply is essential t o keep internal temperatures low. To
assist in cooling the power supply, the sides and rear of the power supply
should be kept clear.
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