JNC350R41-TZ Lineage Power, JNC350R41-TZ Datasheet - Page 11

• Manufacturer Part Number: JNC350R41-TZ
• Description: DC/DC Converters & Regulators 350W 24V-28V 12.5A NegLogic TunableLoop
• Manufacturer: Lineage Power

Specifications of JNC350R41-TZ

• Output Power: 350 W
• Input Voltage Range: 18 V to 36 V
• Input Voltage (nominal): 24 V
• Output Voltage (channel 1): 28 V
• Output Current (channel 1): 12.5 A
• Package / Case Size: Half Brick
• Output Voltage: 28 V
• Product: Isolated
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: CC109158457

Data Sheet
August 9, 2010
Table 2. Recommended values of R
to obtain transient deviation of 2% of Vout for a
6A step load with Vin=24V.
Please contact your Lineage Power technical
representative to obtain more details of this feature as
well as for guidelines on how to select the right value
of external R-C to tune the module for best transient
performance and stable operation for other output
capacitance values.
Over Temperature Protection
The JNC350R module provides with non-latching over
temperature protection. A temperature sensor
monitors the operating temperature of the converter. If
the reference temperature exceeds a threshold of
110ºC (typical) at the center of the baseplate, the
converter will shut down and disable the output. When
the baseplate temperature has decreased by
approximately 20 ºC the converter will automatically
restart.
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.
Thermal Considerations
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
thermally coupled to the case. Heat is removed by
conduction, convection, and radiation to the
surrounding environment. Proper cooling can be
verified by measuring the case temperature. Peak
temperature (T
Figure 19.
Considerations include ambient temperature, airflow,
module power dissipation, and the need for increased
reliability. A reduction in the operating temperature of
the module will result in an increase in reliability. The
thermal data presented here is based on physical
measurements taken in a wind tunnel.
For reliable operation this temperature should not
exceed 100ºC at T
of the module should not exceed the rated power for
the module as listed in the ordering Information table.
Although the maximum T
modules is discussed above, you can limit this
temperature to a lower value for extremely high
reliability.
LINEAGE
R
C
V(mV)
C
TUNE
TUNE
o
Vo
(uF)
(k 1000
(pF)
POWER
1320 1320 1320 1320 1320 1540
32V
470
340
REF
) occurs at the position indicated in
REF
1500 1500 2200 3300 6800
28V
301
320
for cold plate. The output power
REF
25V
301
280
temperature of the power
22V
301
280
TUNE
19V 16.8V
301
260
and C
TUNE
301
290
18 – 36 Vdc Input; 28Vdc Output; 350W Output
JNC350R Power Modules; DC-DC Converters
Figure 19.
Location (top view).
Thermal Derating
The thermal derating presented in Figure 20 has the
JNC350R module thermally coupled to a cold plate
inside a sealed clamshell chassis, without any internal
air circulation. Please contact your Lineage Power
sales representative for information regarding
applications where the module is cooled by heat
removal into a forced airflow that passes through the
interior of the module and over the top baseplate
and/or attached heatsink.
Figure 20. Output Power Derating for JNC350R in
Conduction cooling (cold plate) applications;
T
a
<70ºC in vicinity of module interior; V
375
350
325
300
275
250
20
Case (T
30
REF
40
Baseplate Temperature (C)
) Temperature Measurement
50
60
70
80
IN
= 24V.
90
100
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