EBDW020A0B Datasheet, PDF(9/32 Page) Lineage Power Corporation

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EBDW020A0B Datasheet, PDF (9/32 Pages) Lineage Power Corporation – BARRACUDA SERIES™

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Data Sheet

EBDW020A0B Barracudaâ¢ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 20.0A, 240W Output

Feature Descriptions

Overcurrent Protection

To provide protection in a fault output overload condition, the

EBDW020A0B 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 EBDW020A0B 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 ~25Â°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 EBDW020A0B 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 VIN(-) 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 VIN(-) terminal (Von/off). The switch can be an open collector

or equivalent (see Figure 16). A logic LO is Von/off = -0.3V to 0.8V.

The typical Ion/off during a logic LO (Vin=48V, On/Off

Terminal=0.3V) is 147ÂµA. The switch should maintain a logic-

low voltage while sinking 310ÂµA. During a logic HI, the

maximum Von/off generated by the power module is 8.2V. The

maximum allowable leakage current of the switch at Von/off =

2.0V is 10ÂµA. If using an external voltage source, the maximum

voltage Von/off on the pin is 14.5V with respect to the VIN(-)

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 VIN(-).

For positive logic: leave ON/OFF pin open.

Figure 16. Remote On/Off Implementation.

April 15, 2013

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