KEPCO BOP 20-20DC Modification Sheet - Manual

The Kepco Models BOP 20-20MC and BOP 20-20DC have been modified from standard Kepco
Models BOP 20-20M and BOP 20-20D, respectively, to be stable handling capacitive loads up
to 10 mF.
INSTRUCTION MANUAL CORRECTIONS:
This modification makes the BOP more suitable for a wide variety of applications such as
solar cell/ solar panel testing, piezoelectric device driving/ testing, capacitor testing, capacitive
transducer driving/testing and powering industrial or lab-type applications for capacitive or
capacitive-resistive loads.
Static specifications representing the unit’s accuracy in Voltage mode are identical to the
standard BOP models, while the ripple and noise specifications are better (approximately 50%
lower) for MC and DC models than standard BOP models.
Specifications listed in Table 1 are for BOP 20-20MC and BOP 20-20DC in Voltage Mode.
In voltage mode the bandwidth of the BOP 20-20MC and DC models is higher than the stan-
dard BOP. Nonuniformities of the frequency response can be nearly eliminated by reducing the
bandwidth in Voltage mode. Bandwidth can be reduced in a predictable manner by increasing
the internal compensation capacitance by placing an external capacitor in parallel with C21 of
Assembly A1 (see Table 2 and Figure 1).
TABLE 1. BOP 20-20MC AND BOP 20-20DC SPECIFICATIONS
Bandwidth (DC to f-3dB)
Rise/Fall Time
(3)
Recovery at Step Load
(4)
Resistive Load, Nominal
(1)
Capacitive Load, 10 µF
(2)
4.8 KHz 5.3 KHz 75 µ S 225 µ S
NOTES:
(1) Bandwidth for this model with resistive load is larger than for standard BOP with resistive load.
(2) Nonuniformities of the frequency response for the standard 10
µF load create a larger 3-dB bandwidth than
for the resistive load.
(3) 10% to 90%, with nominal resistive load.
(4) Load between infinity and nominal resistive load values.
TABLE 2. BANDWIDTH CORRECTION
EXTERNAL CAPACITOR
(ACROSS A1C21, SEE FIGURE 1)
1 nF 2.2 nF 4.7 nF 15 nF 33 nF 47 nF 100 nF
CORRECTED BANDWIDTH 4.6 KHz 4.4 KHz 3.2 KHz 1.3 KHz 0.7KHz 0.6 KHz 0.5 KHz
NOTE: Listed bandwidth correction values are for Voltage mode, nominal resistive load.
KEPCO
®
THE POWER SUPPLIER™
MODIFICATION OF STANDARD
KEPCO MODEL BOP 20-20MC
KEPCO MODEL BOP 20-20DC
BOP 20-20MC/DC-r4/031512
KEPCO, INC. z 131-38 SANFORD AVENUE z FLUSHING, NY. 11355 U.S.A. z TEL (718) 461-7000 z FAX (718) 767-1102
email: [email protected] z World Wide Web: http://www.kepcopower.com