Agilent Technologies E3616A Constant Current Mode, Constant Current with Voltage Programming

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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
Where	Iout is the power supply output current.
	Vin is the programming voltage.
	A is the transconductance in Amp/Volt and the values of each
	model are as below.

	Model	A (A/V)	1/A (V/A)

	E3614A	0.6	1.67

	E3515A	0.3	3.33

	E3616A	0.17	6.0

	E3617A	0.1	10

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.

1-10-4

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Contents Agilent E361xA 60W Bench Series DC Power Supplies AprilSafety Summary Operating Instructions General Information Temperature Coefficient Operating Temperature RangeMeter Programming Resolution Line FuseInput Power Requirements InstallationInstallation Data Initial InspectionTURN-ON Checkout Procedure Power CordOperating Instructions Operating Modes Local Operating ModeConnecting Loads Operation Beyond Rated OutputRemote Operating Modes Remote Voltage SensingRemote Analog Voltage Programming MULTIPLE-SUPPLY Operation Normal Parallel OperationAUTO-PARALLEL Operation Normal Series Operation Gramming according to the remote-programming instructionsAUTO-SERIES Operation Total output voltage to ground must not exceed 240 VdcAUTO-TRACKING Operaton = slave output voltageLoad Considerations Service Information Maintenance Test Equipment RequiredOperation Verification Tests Type Required Characteristics USE Recommended Model Performance TestsMeasurement Techniques Line Regulation Source Effect Constant Voltage CV TestsLoad Regulation Load Effect Load Transient Response TimePARDRipple and Noise Pardrms MeasurementPARDPeak-to-Peak Measurement Constant Current CC Tests CV Drift StabilityAdjustment and Calibration Procedure CC Drift StabilityReference and Bias Circuit TroubleshootingOverall Troubleshooting Procedure Regulating Loop TroublesSymptom Checks and Probable Causes Overvoltage Protection Circuit TroublesStep Action Response Probable Cause Step Measure Response Probable Cause Replaceable Parts Table A-10. Replaceable Parts List Table A-10. Replaceable Parts List Contd R28,111 0698-3228 Resistor 49.9K +-1% .125W TF TC=0+-100 RESISTOR-VAR 10K +-10% ALL IC V RGLTR-FXD-POS 4.8/5.2V TO-220 PKG ALL DIODE-GEN PRP 180V 200MA DO-35 ALL Table A-11. Component Value Model Page Page Page Page Manual Supplement Constant Voltage Mode T EAlternative Voltage Programming Using Resistors Programming Voltage Common to the Minus OutputProgramming Voltage Common to the Minus Output Constant Current Mode Constant Current with Voltage ProgrammingCurrent Monitoring Remote Resistor Programming Connections Remote Resistor Programming, Constant VoltageRemote Resistor Programming, Constant Current Certification Declaration of Conformity