Constant Current Mode
The E3614A/15A/16A/17A may be programmed for constant current with an analog voltage or current. Constant current with analog voltage programming can only be achieved with a voltage source that is common with the positive output terminal.
Constant Current with Voltage Programming
Figure 5
Set the CC switch down the rear panel, and all others up.
Vin = 1/A x Iout
Iout = A x Vin |
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Where | Iout is the power supply output current. | |||
| Vin is the programming voltage. |
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| A is the transconductance in Amp/Volt and the values of each | |||
| model are as below. |
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| Model | A (A/V) | 1/A (V/A) |
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| E3614A | 0.6 | 1.67 |
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| E3515A | 0.3 | 3.33 |
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| E3616A | 0.17 | 6.0 |
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| E3617A | 0.1 | 10 |
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Constant Current with Current Programming
When using current to program the power supply, the source must have a dynamic range of 10 volts when the programming source is common to the plus output and 10 volts plus the maximum output voltage expected when the programming source is common to the minus output of the power supply.
The load to the power supply must be stable for the constant current output to be accurate. Current transient response is not specified, and depends on the change of the output voltage of the power supply.
