JBW030-Series Power Module: dc-dc Converters
36-75 Vdc Input; 3.3 Vdc and 5 Vdc Outputs; 30 W
Data Sheet
March 27, 2008
Feature Descriptions (continued)
VI(+)
VO(+)
Output Voltage Set-Point Adjustment
(Trim) (continued)
ON/OFF
SENSE(+)
Radj-up
RLOAD
CASE
VI(–)
TRIM
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.
SENSE(–)
VO(–)
8-715(C)b
The JBW030-Series Power Modules have a fixed cur-
rent-limit set point. Therefore, as the output voltage is
Figure 17. Circuit Configuration to Increase Output
Voltage
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.
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(+)
VO(+)
ON/OFF
SENSE(+)
CASE
VI(–)
TRIM
RLOAD
Radj-down
SENSE(–)
VO(–)
8-748(C)b
Figure 16. Circuit Configuration to Decrease
Output Voltage
10
Lineage Power
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
