1Getting Started
Output Connections
24 E364xA User’s and Service Guide
Voltage drops
The load wires must also be large enough to avoid excessive
voltage drops due to the impedance of the wires. In general,
if the wires are heavy enough to carry the maximum short
circuit current without overheating, excessive voltage drops
will not be a problem. The voltage drops across the load
wires should be limited to less than two volts. Refer to
Table 1- 7 to calculate the voltage drop for some commonly
used AWG copper wires.
Load consideration
Capacitive loading
The power supply will be stable for almost any size load
capacitance. However, large load capacitors may cause
transient response ringing. Certain combinations of load
capacitance, equivalent series resistance, and load lead
inductance may result in instability (oscillation). If this
occurs, the problem may often be solved by either increasing
or decreasing the size of the capacitive load.
A large load capacitor may cause the power supply to cross
into CC or unregulated mode momentarily when the output
voltage is reprogrammed. The slew rate of the output voltage
will be limited to the current setting divided by the total
load capacitance (internal and external).
To satisfy safety requirements, load wires must be heavy enough not to
overheat when carrying the maximum short-circuit output current of the
power supply. If there is more than one load, then any pair of load wires
must be capable of safely carrying the full-rated current of the
power supply.
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