JW050C Lineage Power, JW050C Datasheet - Page 12

• Manufacturer Part Number: JW050C
• Manufacturer: Lineage Power

dc-dc Converters; 36 to 75 Vdc Input, 15 Vdc Output; 50 W to 150 W
Feature Descriptions
Output Voltage Set-Point Adjustment
(Trim)
Figure 24. Circuit Configuration to Increase
Figure 25. Resistor Selection for Increased Output
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.
12
12
100M
100k
10M
1M
(continued)
V
ON/OFF
CASE
V
0
I
I
(+)
(–)
Output Voltage
Voltage
% CHANGE IN OUTPUT VOLTAGE (•%)
0.6
SENSE(+)
SENSE (–)
V
TRIM
V
O
O
(+)
(–)
1.2
(continued)
1.8
R
adj-up
2.4
R
8-715 (C).b
LOAD
8-2092 (C)
3
Overtemperature Protection
The 100 W and 150 W modules feature an overtemper-
ature protection circuit to safeguard against thermal
damage.
The circuit shuts down the module when the maximum
case temperature is exceeded. The module restarts
automatically after cooling.
Thermal Considerations
Introduction
The power modules operate in a variety of thermal
environments; however, sufficient cooling should be
provided to help ensure reliable operation of the unit.
Heat-dissipating components inside the unit are ther-
mally coupled to the case. Heat is removed by conduc-
tion, convection, and radiation to the surrounding
environment. Proper cooling can be verified by mea-
suring the case temperature. Peak temperature (T
occurs at the position indicated in Figure 26.
Note: Top view, pin locations are for reference only.
Figure 26. Case Temperature Measurement
The temperature at this location should not exceed
100 °C. The output power of the module should not
exceed the rated power for the module as listed in the
Ordering Information table.
Measurements shown in millimeters and (inches).
7.6 (0.3)
Location
V
ON/OFF
CASE
V
I
I
38.0 (1.50)
(+)
(–)
+ SEN
– SEN
V
V
TRIM
O
O
(–)
(+)
MEASURE CASE
TEMPERATURE HERE
Lineage Power
April 2008
8-716 (C).f
C
)