JNW350R64-18 datasheet(6/15 Pages) LINEAGEPOWER

Part #	JNW350R64-18

Description	36 - 75 Vdc Input; 28Vdc Output; 350W Output

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Manufacturer	LINEAGEPOWER [Lineage Power Corporation]

Direct Link	http://www.lineagepower.com

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6 / 15 page

Data Sheet

July 27, 2009

JNW350R Power Modules; DC-DC Converters

36 – 75 Vdc Input; 28Vdc Output; 350W Output

LINEAGE POWER

6

Test Configurations

Note: Measure the input reflected-ripple current with a

simulated source inductance (LTEST) of 12 µH. Capacitor

CS offsets possible battery impedance. Measure the current,

as shown above.

Figure 7. Input Reflected Ripple Current Test

Setup.

Note: Use a Cout (470 µF Low ESR aluminum or tantalum

capacitor typical), a 0.1 µF ceramic capacitor and a 10 µF

ceramic capacitor, and Scope measurement should be made

using a BNC socket. Position the load between 51 mm and

76 mm (2 in. and 3 in.) from the module.

Figure 8. Output Ripple and Noise Test Setup.

Note: All measurements are taken at the module terminals.

When socketing, place Kelvin connections at module

terminals to avoid measurement errors due to socket contact

resistance.

Figure 9. Output Voltage and Efficiency Test

Setup.

Design Considerations

Input Source Impedance

The power module should be connected to a low

ac-impedance source. A highly inductive source

impedance can affect the stability of the power

module. For the test configuration in Figure 7, a

470μF Low ESR aluminum capacitor, CIN , mounted

close to the power module helps ensure the stability

of the unit. Consult the factory for further application

guidelines

Output Capacitance

The JNW350R power module requires a minimum

output capacitance of 440µF Low ESR aluminum

capacitor, Cout to ensure stable operation over the full

range of load and line conditions, see Figure 8. If the

ambient temperature is under -20C, it is required to

use at least 3 pcs of minimum capacitors in parallel.

In general, the process of determining the acceptable

values of output capacitance and ESR is complex and

is load-dependant.

Safety Considerations

For safety-agency approval of the system in which the

power module is used, the power module must be

installed in compliance with the spacing and

separation requirements of the end-use safety agency

standard, i.e., UL60950-1, CSA C22.2 No. 60950-1-

03, EN60950-1 and VDE 0805:2001-12.

For end products connected to –48V dc, or –60Vdc

nominal DC MAINS (i.e. central office dc battery

plant), no further fault testing is required. *Note: -60V

dc nominal battery plants are not available in the U.S.

or Canada.

For all input voltages, other than DC MAINS, where

the input voltage is less than 60V dc, if the input

meets all of the requirements for SELV, then:

The output may be considered SELV. Output

voltages will remain within SELV limits even with

internally-generated non-SELV voltages. Single

component failure and fault tests were performed

in the power converters.

One pole of the input and one pole of the output

are to be grounded, or both circuits are to be kept

floating, to maintain the output voltage to ground

voltage within ELV or SELV limits. However,

SELV will not be maintained if VI(+) and VO(+)

are grounded simultaneously.

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