Atec Chroma-63600 Series - Manual (Page 5)

Figure 3 :
Parallel synchronous dynamic loading Figure 4 :
Parallel non-synchronous dynamic loading
The 63600 offers a digitizing function that makes the load very convenient for recording
transients in both voltage and current waveforms. The following are the specifications of setting
parameters :
Sampling Time : 2µs to 40ms / R : 2µs (Setting the interval of sampling time)
Sampling Point : 1 to 4096 (Setting the total sampling points)
dIgITIZINg FuNCTION
SINE WAVE dyNAmIC FuNCTION
The 63600 has a unique sine wave loading function which allows setting of a current bias (I_DC),
a loading sine wave (I_AC) and sine wave frequency without the need for an external function
generator. As see in the figure right, CH1 is the actual load current and CH2 is the voltage
waveform of the UUT. This function can be used in D2D/ATX Power supplies for sine wave dynamic
testing.
According to Intel’s Design Guide for ATX 12V Power Supplies, measurement of output transient response requires simultaneous load steps when testing
the power supply’s +12VDC, +5VDC and +3VDC outputs (all steps must occur at the same time). The 63600 provides a dynamic synchronous function
that can be used to perform this test on up to 10 outputs within each mainframe. The total dynamic synchronous channels can up to 40 when using 4
mainframes providing higher flexible and increased utility.
In addition to the dynamic loading function the
63600 provides Master/Slave (parallel) operation of
individual loads. This capability provides for up to
2,000W per mainframe. Figure 3 shows the parallel
synchronous dynamic loading and Figure 4 shows
the parallel non-synchronous dynamic loading
of previous designs. As show, the Vpeak value is
significantly reduced and incorrect when using
non-synchronous loading.
When the need is for increased power, paralleling two or more loads can be done to achieve the desired load current. The 63600 provides the user with
smart Master/Slave mode controls which enables the user to program the load currents of the Master and have them automatically calculated and
downloaded to the slave modules. Using several loads in parallel to emulate a single load dramatically simplifies operation and allows the 63600 to be
used for both multiple output power supplies and larger single output supplies. The 63600 can controlled and reconfigured with USB, Ethernet, and GPIB
interfaces for automated testing applications.
mASTEr / SlAVE PArAllEl CONTrOl
USB
Ethernet
GPIB
63600 Series
Master Slave
Front Panel Control
Application for High Power
Master Slave
UUT (Server Power) +48V +5V +12V
None