JRW065A0Y1 Datasheet JRW017A0B1, JRW040A0A41, JRW060A0F1 | P13-P15

Data Sheet

July 21, 2008

JRW017-070 Series Power Modules DC-DC Converters

36-75Vdc Input; 1.2Vdc to 12Vdc Output

LINEAGE POWER 13

Test Configurations

Note: Measure input reflected-ripple current with a simulated source

inductance (LTEST) of 12 µH. Capacitor CS offsets possible battery

impedance. Measure current as shown above.

Figure 43. Input Reflected Ripple Current Test

Setup.

Note: Use a 1.0 µF ceramic capacitor and a 10 µF aluminum or

tantalum capacitor. 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 44. 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 45. 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 43, a

100μF electrolytic capacitor (ESR< 0.7Ω at 100kHz),

mounted close to the power module helps ensure the

stability of the unit. Consult the factory for further

application guidelines.

Output Capacitance

High output current transient rate of change (high

di/dt) loads may require high values of output

capacitance to supply the instantaneous energy

requirement to the load. To minimize the output

voltage transient drop during this transient, low E.S.R.

(equivalent series resistance) capacitors may be

required, since a high E.S.R. will produce a

correspondingly higher voltage drop during the

current transient.

Output capacitance and load impedance interact with

the power module’s output voltage regulation control

system and may produce an ’unstable’ output

condition for the required values of capacitance and

E.S.R.. Minimum and maximum values of output

capacitance and of the capacitor’s associated E.S.R.

may be dictated, depending on the module’s control

system.

The process of determining the acceptable values of

capacitance and E.S.R. is complex and is load-

dependant. Lineage Power provides Web-based tools

to assist the power module end-user in appraising

and adjusting the effect of various load conditions and

output capacitances on specific power modules for

various load conditions.

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., UL* 60950-1 Recognized, CSA

†

C22.2

No. 60950-3-01 Certified, and EN 60950-1 (VDE

‡

0805): 2001-12 Licensed.

These converters have been evaluated to the spacing

requirements for Basic Insulation per the above safety

standards. For Basic Insulation models (“-B” Suffix),

1500 Vdc is applied from Vi to Vo to 100% of outgoing

production.

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.

Data Sheet

July 21, 2008

JRW017-070 Series Power Modules DC-DC Converters

36-75Vdc Input; 1.2Vdc to 12Vdc Output

LINEAGE POWER 14

Safety Considerations (continued)

*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.

For all input sources, other than DC MAINS, where

the input voltage is between 60 and 75V dc

(Classified as TNV-2 in Europe), the following must

be meet, if the converter’s output is to be evaluated

for SELV:

 The input source is to be provided with

reinforced insulation from any hazardous voltage,

including the ac mains.

 One Vi pin and one Vo pin are to be reliably

earthed, or both the input and output pins are to

be kept floating.

 Another SELV reliability test is conducted on

the whole system, as required by the safety

agencies, on the combination of supply source

and the subject module to verify that under a

single fault, hazardous voltages do not appear at

the module’s output.

The power module has ELV (extra-low voltage)

outputs when all inputs are ELV.

All flammable materials used in the manufacturing of

these modules are rated 94V-0.

The input to these units is to be provided with a

maximum 20A fast-acting (or time-delay) fuse in the

unearthed lead.

Data Sheet

July 21, 2008

JRW017-070 Series Power Modules DC-DC Converters

36-75Vdc Input; 1.2Vdc to 12Vdc Output

LINEAGE POWER 15

Feature Descriptions

Remote On/Off

Two remote on/off options are available. Positive logic

remote on/off turns the module on during a logic-high

voltage on the ON/OFF pin, and off during a logic low.

Negative logic remote on/off turns the module off

during a logic high and on during a logic low. Negative

logic, device code suffix "1," is the factory-preferred

configuration. To turn the power module on and off,

the user must supply a switch to control the voltage

between the on/off terminal and the VI (-) terminal

(Von/off). The switch can be an open collector or

equivalent (see Figure 46). A logic low is Von/off = 0

V to I.2 V. The maximum Ion/off during a logic low is 1

mA. The switch should maintain a logic-low voltage

while sinking 1 mA. During a logic high, the maximum

Von/off generated by the power module is 15 V. The

maximum allowable leakage current of the switch at

Von/off = 15V is 50 µA. If not using the remote on/off

feature, perform one of the following to turn the unit

on:

For negative logic, short ON/OFF pin to VI(-).

For positive logic: leave ON/OFF pin open.

Figure 46. Remote On/Off Implementation.

Overcurrent Protection

To provide protection in a fault output overload

condition, the module is equipped with internal

current-limiting circuitry and can endure current limit

for few seconds. If overcurrent persists for few

seconds, the module will shut down and remain latch-

off. The overcurrent latch is reset by either cycling the

input power or by toggling the on/off pin for one

second. If the output overload condition still exists

when the module restarts, it will shut down again. This

operation will continue indefinitely until the

overcurrent condition is corrected.

An auto-restart option is also available.

Input Undervoltage Lockout

At input voltages below the input undervoltage lockout

limit, the module operation is disabled. The module

will begin to operate at an input voltage above the

undervoltage lockout turn-on threshold.

Overtemperature Protection

These modules feature an overtemperature protection

circuit to safeguard against thermal damage. The

circuit shuts down and latches off the module when

the maximum device reference temperature is

exceeded. 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.

Over Voltage Protection

The output overvoltage protection consists of circuitry

that monitors the voltage on the output terminals. If

the voltage on the output terminals exceeds the over

voltage protection threshold, then the module will

shutdown and latch off. The overvoltage latch is reset

by either cycling the input power for one second or by

toggling the on/off signal for one second. The

protection mechanism is such that the unit can

continue in this condition until the fault is cleared.

Remote sense

Remote sense minimizes the effects of distribution

losses by regulating the voltage at the remote-sense

connections. The voltage between the remote-sense

pins and the output terminals must not exceed the

output voltage sense range given in the Feature

Specifications table i.e.:

[Vo(+) – Vo(-)] – [SENSE(+) – SENSE(-)] ≤ 10% of

o,nom

The voltage between the Vo(+) and Vo(-) terminals

must not exceed the minimum output overvoltage

shut-down value indicated in the Feature

Specifications table. This limit includes any increase

in voltage due to remote-sense compensation and

output voltage set-point adjustment (trim). See Figure

47. If not using the remote-sense feature to regulate

the output at the point of load, then connect

SENSE(+) to Vo(+) and SENSE(-) to Vo(-) at the

module.

Although the output voltage can be increased by both

the remote sense and by the trim, the maximum

increase for the output voltage is not the sum of both.

The maximum increase is the larger of either the

remote sense or the trim. The amount of power

delivered by the module is defined as the voltage at

the output terminals multiplied by the output current.

When using remote sense and trim: the output

voltage of the module can be increased, which at the

same output current would increase the power output

of the module. Care should be taken to ensure that

the maximum output power of the module remains at

or below the maximum rated power.

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