JBW030F datasheet(10/16 Pages) LINEAGEPOWER

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Lineage Power

Data Sheet

March 27, 2008

36-75 Vdc Input; 3.3 Vdc and 5 Vdc Outputs; 30 W

JBW030-Series Power Module: dc-dc Converters

Feature Descriptions (continued)

Output Voltage Set-Point Adjustment

(Trim) (continued)

The combination of the output voltage adjustment and

sense range and the output voltage given in the Fea-

ture Specifications table cannot exceed 110% of the

nominal output voltage between the VO(+) and VO(–)

terminals.

The JBW030-Series Power Modules have a fixed cur-

rent-limit set point. Therefore, as the output voltage is

adjusted down, the available output power is reduced.

In addition, the minimum output current is a function of

the output voltage. As the output voltage is adjusted

down, the minimum required output current can

increase.

8-748(C)b

Figure 16. Circuit Configuration to Decrease

Output Voltage

8-715(C)b

Figure 17. Circuit Configuration to Increase Output

Voltage

Output Overvoltage Protection

The output overvoltage clamp consists of control cir-

cuitry, independent of the primary regulation loop, that

monitors the voltage on the output terminals. The con-

trol loop of the clamp has a higher voltage set point

than the primary loop (see Feature Specifications

table). This provides a redundant voltage-control that

reduces the risk of output overvoltage.

VI (+)

VI (–)

ON/OFF

CASE

VO (+)

VO(–)

SENSE(+)

TRIM

SENSE(–)

Radj-down

RLOAD

VI(+)

VI(–)

ON/OFF

CASE

VO(+)

VO(–)

SENSE(+)

TRIM

SENSE(–)

Radj-up

RLOAD

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