QBK025A0B71-BPH datasheet(8/16 Pages) LINEAGEPOWER | 36-55Vdc Input; 12Vdc Output Voltage; 25A Output Current

부품명	QBK025A0B71-BPH

부품 상세설명	36-55Vdc Input; 12Vdc Output Voltage; 25A Output Current

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제조업체	LINEAGEPOWER [Lineage Power Corporation]

홈페이지	http://www.lineagepower.com

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8 / 16 page

Data Sheet

March 27, 2008

QBK025A0B DC-DC Power Modules:

36-55Vdc Input; 12Vdc Output Voltage; 25A Output Current

LINEAGE POWER

8

Feature Description

Remote On/Off

Two remote on/off 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 low.

Negative logic remote on/off turns the module off

during a logic high and on during a logic low. Negative

logic, device code suffix "1," is the factory-preferred

configuration. The on/off circuit is powered from an

internal bias supply. 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 Vi (-)

terminal (Von/off). The switch can be an open

collector or equivalent (see Figure 12). A logic low is

Von/off = 0.0V to 0.8V. The typical Ion/off during a

logic low is 10 µA. The switch should maintain a logic-

low voltage while sinking 10µA. During a logic high,

the maximum Von/off generated by the power module

is 5.0V. The maximum allowable leakage current of

the switch at Von/off = 2.0V is 6.0µA. If using an

external voltage source, the maximum voltage V on/off

on the pin is 14.0V with respect to the Vi (-) 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 VI(-).

For positive logic: leave ON/OFF pin open.

VO(+)

VO(–)

VI(–)

+

–

Ion/off

ON/OFF

VI(+)

LOAD

Von/off

Figure 10. Circuit configuration for using Remote

On/Off Implementation.

Over Current Protection

To provide protection in a fault output overload

condition, the module is equipped with internal

current-limiting circuitry and can endure current

limiting for a few mili-seconds. If the over current

condition persists beyond a few milliseconds, the

module will shut down and remain latched off. The

over current latch is reset by either cycling the input

power or by toggling the on/off pin for one second. If

the output overload condition still exists when the

module restarts, it will shut down again. This operation

will continue indefinitely until the over current condition

is corrected.

An auto-restart option is also available. An auto-restart

feature continually attempts to restore the operation

until fault condition is cleared.

Input Under/Over Voltage Lockout

At input voltages above or below the input under/over

voltage lockout limits, module operation is disabled.

The module will begin to operate when the input

voltage level changes to within the under and

overvoltage lockout limits.

Over Temperature Protection

These modules feature an over temperature

protection circuit to safeguard against thermal

damage. The circuit shuts down and latches off the

module when the maximum device reference

temperature is exceeded. The module can be

restarted by cycling the dc input power for at least one

second or by toggling the remote on/off signal for at

least one second.

Output Over Voltage Clamp

The output overvoltage clamp consists of a control

circuit, independent of the primary regulation loop, that

monitors the voltage on the output terminals and

clamps the voltage when it exceeds the overvoltage

set point. The control loop of the clamp has a higher

voltage set point than the primary loop. This provides

a redundant voltage control that reduces the risk of

output overvoltage.

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