CG Series
Single Output
2:1 Input Voltage Range
30 Watt DC/DC Converter
Rev B
DESIGN & FEATURE CONSIDERATIONS
Remote On/Off
Positive logic remote on/off turns the module on during a logic high voltage on the remote on/off pin and
off during a logic low. Negative logic remote on/off turns the module off during a logic low and on during
a logic high. To turn the power module on and off, the user must supply a switch to control the voltage
between the on/off terminal and the -Vin terminal. The switch can be an open collector or equivalent.
A logic low is -0.7V to 1.0V.
A logic high is 2.5V to 100V.
The maximum sink current at the On/Off terminal (Pin 3) during a logic low is 100 mA. The maximum
allowable leakage current of a switch connected to the On/Off terminal (Pin 3) at logic high (2.5V to
100V) is 5uA.
Output Voltage Trim
Output voltage trim allows the user to increase or decrease the output voltage set point of a module.
The output voltage can be adjusted by placing an external resistor (Radj) between the Trim and +Vout
or -Vout terminals. By adjusting Radj, the output voltage can be changed by ±10% of the nominal output
voltage.
A 10K, 1 or 10 Turn trimpot is usually specified for continuous trimming. Trim pin may be safely left
floating if it is not used.
Connecting the external resistor (Radj (up)) between the Trim and -Vout pins increases the output voltage
set point as defined by the following equation:
(33∗Vout) − (30 ∗Vadj
)
Radj(up)
=
Vadj −Vout
Connecting the external resistor (Radj (down)) between the Trim and +Vout pins decreases the output
voltage set point as defined by the following equation:
(36.667 ∗Vadj) − (33∗Vout
)
Radj(down)
=
Vout −Vadj
Vout:
Vadj:
Units:
Nominal Output Voltage
Adjusted Output Voltage
VDC/KΩ
Wall Industries, Inc. • Tel: 603-778-2300 • Toll Free: 888-597-9255 •
website: www.wallindustries.com • e-mail: sales@wallindustries.com
5/15/2019
Page 5 of 9
WALL [ WALL INDUSTRIES,INC. ]
