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4. O
PERATION
F
4.1.
UNCTIONAL
The M3628UCT is a digitally controlled DC supply capable of sourcing and sinking 1
to 30 amps between 2 and 20VDC. The unit is powered by standard 50-60 Hz
120VAC/240VAC. The output voltage and current is set by the digital interface panel
on the front of the unit. The unit is capable of safely charging and discharging
connected capacitors with a constant current as well as running a complete
charge/hold/discharge test cycle appropriate for ultra-capacitors. When a capacitor is
discharged, the unit will calculate and display the capacitance and ESR of the
capacitor.
A
4.2.
RCHITECTURE AND
Electrically, the M3628UCT is a current and voltage regulated, bi-directional DC-DC
converter with response times on the order of milliseconds. Additionally, in order to
manage the flow of power into the system during discharge operations, the M3628UCT
includes an integrated resistor bank and regulating chopper capable of dissipating
600W continuously.
CB1
DC
SUPPLY
H
4.3.
ARDWARE
AC P
4.3.1.
The M3628UCT is equipped with a standard IEC C14 connector for input
power. This connector mates with a standard C13 cable, commonly used with
desktop computers, to provide power to the unit.
D
ESCRIPTION
C
IRCUIT
Figure 4-1: M3628UCT Schematic
R1
D1
Q1
V
F
EATURES
I
C
OWER
NPUT
ONNECTOR
S
CHEMATIC
Q3
L1
C1
Q2
User's Manual
F1
A
V
C2
15
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