GE Industrial Solutions EBDW025A0B Barracuda Series - Manual (Page 9)

GE
Data Sheet
EBDW025A0B Barracuda™ Series; DC-DC Converter Power Modules
36-75Vdc Input; 12.0Vdc, 25.0A, 300W Output
April 15, 2013 ©2012 General Electric Company. All rights reserved. Page 9
Feature Descriptions
Overcurrent Protection
To provide protection in a fault output overload condition, the
EBDW025A0B module is equipped with internal current-
limiting circuitry and can endure current limiting continuously.
If the overcurrent condition causes the output voltage to fall
below 4.0V, the module will shut down. The module is factory
default configured for auto-restart operation. The auto-restart
feature continually attempts to restore the operation until fault
condition is cleared. If the output overload condition still exists
when the module restarts, it will shut down again. This
operation will continue indefinitely until the overcurrent
condition is corrected.
The IOUT_OC_WARN threshold level, IOUT_OC_FAULT
threshold level, and IOUT_OC_FAULT_RESPONSE can be
reconfigured via the PMBus interface. If the FAULT_RESPONSE
is reconfigured to remain latched off following an overcurrent
shutdown, the overcurrent latch is reset by either cycling the
input power, or by toggling the on/off pin for one millisecond.
Output Overvoltage Protection
The module contains circuitry to detect and respond to output
overvoltage conditions. If the overvoltage condition causes the
output voltage to rise above the limit in the Specifications
Table, the module will shut down. The EBDW025A0B module is
factory default configured for auto-restart operation. The
auto-restart feature continually attempts to restore the
operation until fault condition is cleared. If the output
overvoltage condition still exists when the module restarts, it
will shut down again. This operation will continue indefinitely
until the overvoltage condition is corrected.
The VOUT_OV_FAULT threshold level and VOUT_OV_FAULT
_RESPONSE can be reconfigured via the PMBus interface. If the
FAULT _RESPONSE is reconfigured to remain latched off
following an overvoltage shutdown, the overvoltage latch is
reset by either cycling the input power, or by toggling the
on/off pin for one millisecond.
Overtemperature Protection
The modules feature an overtemperature protection circuit to
safeguard against thermal damage. The circuit shuts down the
module when the default maximum device reference
temperature is exceeded. The module is factory default
configured to automatically restart once the reference
temperature cools by ~25°C.
The OT_WARNING and OT_FAULT threshold levels and
OT_FAULT_RESPONSE can be reconfigured via the PMBus
interface. If the FAULT _RESPONSE is reconfigured to remain
latched off following an overtemperature shutdown, the
overtemperature latch is reset by either cycling the input
power or by toggling the on/off pin for one millisecond.
Input Under Voltage Lockout
When Vin exceeds VIN_ON, the module output is enabled,
when Vin falls below VIN_OFF, the module output is disabled.
VIN_ON and VIN_OFF can be reconfigured via the PMBus
interface. A minimum 2V hysteresis between VIN_ON and
VIN_OFF is required.
Input Over Voltage Lockout
The EBDW025A0B module contains circuitry to detect and
respond to input overvoltage conditions. If the overvoltage
condition causes the input voltage to rise above the limit in the
Specifications Table, the module will shut down. The module is
factory default configured for auto-restart operation. The
auto-restart feature continually monitors the input voltage and
will restart the module when the level falls 7V below the
VIN_OV_FAULT level.
The VIN_OV_FAULT threshold level can be reconfigured via the
PMBus interface.
Remote On/Off (i)
The module contains a standard on/off control circuit
reference to the V
IN
(-) terminal. Two factory configured remote
on/off logic options are available. Positive logic remote on/off
turns the module on during a logic-high voltage on the
ON/OFF pin, and off during a logic LO. Negative logic remote
on/off turns the module off during a logic HI, and on during a
logic LO. Negative logic, device code suffix "1," is the factory-
preferred configuration. The On/Off circuit is powered from an
internal bias supply, derived from the input voltage terminals.
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 V
IN
(-) terminal (V
on/off
). The switch can be an open collector
or equivalent (see Figure 15). A logic LO is V
on/off
= -0.3V to 0.8V.
The typical I
on/off
during a logic LO (Vin=48V, On/Off
Terminal=0.3V) is 147µA. The switch should maintain a logic-
low voltage while sinking 310µA. During a logic HI, the
maximum V
on/off
generated by the power module is 8.2V. The
maximum allowable leakage current of the switch at V
on/off
=
2.0V is 10µA. If using an external voltage source, the maximum
voltage V
on/off
on the pin is 14.5V with respect to the V
IN
(-)
terminal.
If not using the remote on/off feature, perform one of the
following to turn the unit on:
For negative logic, short ON/OFF pin to V
IN
(-).
For positive logic: leave ON/OFF pin open.
Figure 15. Remote On/Off Implementation.