QBDW033A0B41Z Datasheet, PDF(8/17 Page) Lineage Power Corporation – QBDW033A0B Series Power Modules; DC-DC Converters

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QBDW033A0B41Z Datasheet, PDF (8/17 Pages) Lineage Power Corporation – QBDW033A0B Series Power Modules; DC-DC Converters

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Advanced Data Sheet

February 10, 2011

QBDW033A0B Series Power Modules; DC-DC Converters

36-75Vdc Input; 9.6-12Vdc Output; 33A Output Current

Feature Descriptions

OverCurrent Protection

To provide protection in a fault output overload condition,

the module is equipped with internal current-limiting circuitry

and can endure current limiting continuously. If the

OverCurrent (IOUT_OC) condition causes the output

voltage to fall below tbdV , the module will shut down and

remain latched off. The overcurrent 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 overcurrent condition is

corrected.

A factory configured auto-restart option is also available. An

auto-restart feature continually attempts to restore the

operation until fault condition is cleared.

The IOUT_OC _WARNing and FAULT threshold levels, and

IOUT_OC_FAULT_RESPONSE can be reconfigured via

the PMBus interface.

Remote On/Off [CONTROL](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(i) 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(i) 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(i) terminal and the VIN(-)

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

equivalent (see Figure 13). A logic low is Von/off(i) = -0.3V to

0.8V. The typical Ion/off(i) during a logic low is TBDÂµA. The

switch should maintain a logic-low voltage while sinking

TBDÂµA. During a logic high, the maximum Von/off(i)

generated by the power module is TBDV. The maximum

allowable leakage current of the switch at Von/off(i)= 2.0V is

TBDÂµA. If using an external voltage source, the maximum

voltage Von/off(i) on the pin is TBDV 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(i) pin to VIN(-).

For positive logic: leave ON/OFF(i) pin open.

Remote On/Off [CONTROL](o)

The module contains an configurable on/off control circuit

reference to the VO(-) 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 low.

Negative logic remote on/off turns the module off during a

logic high, and on during a logic low. The logic of the

ON/OFF(o) pin shall match the logic of the ON/OFF(i) pin.

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

preferred configuration. The On/Off(o) circuit is powered

from an internal bias supply, derived from the output bias

voltage. To turn the power module on and off, the user must

supply a switch to control the voltage between the On/Off

(o) terminal and the VO(-) terminal (Von/off(o)). The switch

can be an open collector or equivalent (see Figure 13). A

logic low is Von/off(o) = -0.3V to 0.8V. The typical Ion/off(o)

during a logic low is TBDÂµA. The switch should maintain a

logic-low voltage while sinking TBDÂµA. During a logic high,

the maximum Von/off(o) generated by the power module is

TBDV. The maximum allowable leakage current of the

switch at Von/off(o) = 2.0V is TBDÂµA. If using an external

voltage source, the maximum voltage Von/off on the pin is

TBDV 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(o) pin to Vi(-).

For positive logic: leave ON/OFF(o) pin open.

When both On/Off(i) and On/Off(o) are present, the module

shall operate if either is asserted. Using Mfgr_Specif

commands, it shall be possible to reconfigure the On/Off

logic between positive and negative via PMBus, and it shall

also be possible to reconfigure the combination of On/Off(i)

and On/Off(o) from OR to AND for module operation.

Output Overvoltage Protection

The output overvoltage protection 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.

Overtemperature Protection

These modules feature an overtemperature 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.

Figure 13. Remote On/Off Implementation.

LINEAGE POWER

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.

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