Output Characteristic; Specifications And Supplemental Characteristics - HP 654 A Series Operating Manual

Output Characteristic
General
The power supply can operate in either CV (constant voltage) or CC (constant current)
over its voltage and current ratings (see "Performance Specifications"). The operating
locus is shown by the Output Characteristic Curve in "Supplemental Characteristics". The
operating point is determined by the voltage setting (Vg), the current setting
(Is),
and the
load impedance. Two operating points are shown. Point 1 is defined by the load line cutting
the operating locus in the constant-voltage region. This region defines the CV mode. Point
2 is defined by the load line cutting the operating locus in the constant-current region. This
region defines the CC mode.
Downprogramming
The power supply can sink current for more rapid down programming in the CV mode. For
Series 654xA and 655xA supplies, this capability is defined by the second quadrant area (-!«)
of the Output Characteristic Curve. These supplies can sink about 20% of their maximum
rated positive output current. For Series 657xA , this is an uncharacterized current-sinking
area that provides a limited downprogramming capability.
SPECIFICATIONS AND SUPPLEMENTAL CHARACTERISTICS
Table 1-1 lists the specifications and supplemental characteristics of the Series 654xA and
655xA power supplies. Table 1-2 lists the specifications and supplemental characteristics for
the Series 657xA power supplies. Specifications are warranted over the specified temperature
range. Supplemental characteristics are not warranted but are descriptions of performance
determined either by design or type testing.
Output Characteristic
General Information 1-3