GE Industrial Solutions JNC350R User Manual

Data Sheet
August 9, 2010

JNC350R Series Power Modules; DC-DC Converters

18-36 Vdc Input; 28Vdc Output; 350W Output

RoHS Compliant

Applications

 RF Power Amplifier

 Wireless Networks

 Switching Networks

Options

 Auto-restart after either output OCP or OVP

fault shutdown (“3” option code)

 Auto-restart only after output OCP fault

shutdown (“4” option code)

 Shorter pins (“6” or “8” option code)

 Unthreaded heatsink holes (-18 option code)

 Tunable Loop™ for transient response

optimization (-T option code)

Features

 Compliant to RoHS EU Directive 2002/95/EC (-Z

versions)

 Compliant to ROHS EU Directive 2002/95/EC with

lead solder exemption (non-Z versions)

 Compliant to IPC-9592, Class II, Category 2

 High power density: 129 W/in3

 Industry standard half-brick pin-out

 Industry standard half-brick footprint

57.7mm x 60.7mm x 12.7mm

(2.27” x 2.39” x 0.5”)

 2:1 input voltage range

 Low output ripple and noise

 Constant switching frequency

 Single tightly regulated output

 No minimum load required

 Remote Sense

 Output voltage adjustment trim, 16.8Vdc to 32.0Vdc

 Accepts transient overloads without shutdown

 Latch after output OVP/OCP fault shutdown

 Over temperature protection auto restart

 Wide operating case temperature range (-40°C to

100°C)

 CE mark meets 2006/95/EC directives§

 UL60950-1/CSA† C22.2 No. 60950-1-03 Certified

(CCSAUS) and VDE‡ 0805:2001-12 (EN60950-1)
Licensed

 ISO** 9001 and ISO 14001 certified manufacturing

facilities

Description

The JNC350R series of dc-dc converters are a new generation of isolated DC/DC power modules providing up to
350W output power in an industry standard half-brick size footprint, which makes it an ideal choice for high voltage
and high power applications. Threaded-through holes are provided to allow easy mounting or addition of a heat sink
for high-temperature applications. The output is fully isolated from the input, allowing versatile polarity configurations
and grounding connections. This module contains an optional new feature, the Tunable Loop
user to optimize the dynamic response of the converter to match the load with reduced amount of output
capacitance, leading to savings on cost and PWB area.

* UL is a re gistered trademark of Underwriters Laboratories, Inc.

†

CSA is a reg istered trademark of Canadian Standards Associat ion.

‡

VDE is a t rademark of Verband Deutscher Elektrotechniker e.V.

** ISO is a registered trademark of the International Orga nization of Standards

TM

, which allows the

Document No: DS10-002 ver 1.01

PDF name: JNC350R.pdf

:

Data Sheet
August 9, 2010

JNC350R Power Modules; DC-DC Converters

18 – 36 Vdc Input; 28Vdc Output; 350W Output

Absolute Maximum Ratings

Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are
absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in
excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for
extended periods can adversely affect the device reliability.

Parameter Device Symbol Min Max Unit

Input Voltage

Continuous All V

Transient, operational (100 ms) All V

Operating Ambient Temperature
Please contact your Lineage Power Sales representative

for information on thermal derating when using forced
airflow.

All Ta

IN

IN,trans

-0.3 40 Vdc

-0.3 50 Vdc

-40 85 °C

Operating Case Temperature
(See Thermal Considerations section, Figure 20)

Storage Temperature All T

I/O Isolation Voltage: Input to Case, Input to Output All

Output to Case All

All Tc -40 100 °C

stg

 
 

-55 125 °C

1500 Vdc

500 Vdc

Electrical Specifications

Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions.

Parameter Device Symbol Min Typ Max Unit

Operating Input Voltage
(see Figure 12 for V
Maximum Input Current

(VIN=18V to 36V, IO=I

Inrush Transient All I2t 2 A2s

Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 12H source impedance; V
I

= I

; see Figure 7)

O

Omax

when using trim-up feature)

IN, min

)

O, max

=0V to 36V,

IN

All V

All I

All 25 mA

CAUTION: This power module is not internally fused. An input line fuse must always be used.

This power module can be used in a wide variety of applications, ranging from simple standalone operation to being
an integrated part of complex power architecture. To preserve maximum flexibility, internal fusing is not included.
Always use an input line fuse, to achieve maximum safety and system protection. The safety agencies require a fast­acting fuse with a maximum rating of 30 A (see Safety Considerations section). Based on the information provided in
this data sheet on inrush energy and maximum dc input current, the same type of fuse with a lower rating can be
used. Refer to the fuse manufacturer’s data sheet for further information.

18 24 36 Vdc

IN

IN,max

25 A

dc

p-p

LINEAGE POWER 2

Data Sheet

g

)

August 9, 2010

JNC350R Power Modules; DC-DC Converters

18 – 36 Vdc Input; 28Vdc Output; 350W Output

Electrical Specifications (continued)

Parameter Device Symbol Min Typ Max Unit

Output Voltage Set-point
(V

Output Voltage

IN=VIN,nom

, IO=I

O, max

1

, Tc =25°C)

(Over all operating input voltage, resistive load,
and temperature conditions until end of life)

Output Regulation

Line (VIN=V

Load (IO=I

IN, min

O, min

to V

to I

) All  0.1 0.2 %V

IN, max

)1 All  0.1 0.2 %V

O, max

Temperature (Tc = -40ºC to +100ºC) All

Output Ripple and Noise on nominal output

(VIN=V

IN, nom

and IO=I

O, min

to I

)

O, max

RMS (5Hz to 20MHz bandwidth) All

Peak-to-Peak (5Hz to 20MHz bandwidth)2 All

External Capacitance (ESR

Without the Tunable Loop™ (ESR
With the Tunable Loop™ (ESR > 50 m)

> 50 m)

3

MAX

3

= 80m)

-T C

4

Output Current2 All I

Output Current Limit Inception All I

Output Short Circuit Current (VO 0.25Vdc) All I

Efficiency
V

IN=VIN, nom

, Tc=25°C IO=I

O, max , VO

= V

O,set

Switching Frequency f

Dynamic Load Response

(Io/t=1A/10s; Vin=Vin,
with a 470 F aluminum and a 10 µF ceramic

; Tc=25°C; Tested

nom

capacitor across the load.)

Load Change from Io= 50% to 75% of Io,max:

Peak Deviation

Settling Time (Vo<10% peak deviation)

Load Change from Io= 25% to 50% of Io,max:

Peak Deviation

Settlin

Time (Vo<10% peak deviation

1. For Vin  19V, and case temperatures  85°C, output voltage regulation is relaxed to -2.5%V

2. When operating at output current between 0A

3. Use a minimum 2 x 220uF output capacitor. Recommended capacitor is Nichicon CD series, 220uF/35V. If the ambient
temperature is less than 0°C, use 3x of the minimum C

4. External capacitors may require using the new Tunable Loop™ feature to ensure that the module is stable as well as getting the
best transient response. See the Tunable Loop™ section for details.

All

All

All, except

-T

-T C

V

O, set

V

C

o

O, lim

O, sc

O

O

O

O

All 

sw

All

and 1Adc, output ripple may exceed maximum pk-pk limits.

dc

.

O

V

pk

ts

V

pk

t

s

27.5 28 28.5 V

27.15








0.5 1.5 %V

45 55 mV

80 200 mV

440 6500 F

440 470 F
440 8,000 F

0 12.5 Adc

13.1



30 A





91

300







o,set

2

1.5

2

1.5
.

28.85 V

17.5 Adc











kHz

%V

ms

%V

ms

%

dc

dc

o,set

o,set

o,set

rms

pk-pk

rms

O, set

O, set

Isolation Specifications

Parameter Symbol Min Typ Max Unit

Isolation Capacitance C

Isolation Resistance R

iso

iso



10

15



 

nF

M

General Specifications

Parameter Device Symbol Min Typ Max Unit

Calculated Reliability based upon Telcordia SR­332 Issue 2: Method
T

=40°C, airflow = 200 lfm, 90% confidence)

A

I Case 3 (I

=80%I

O

O, max

,

All

Weight All

FIT

MTBF

341.8

2,925,365



2.8 oz.

78



LINEAGE POWER 3

109/Hours

Hours

g

Data Sheet
August 9, 2010

JNC350R Power Modules; DC-DC Converters

18 – 36 Vdc Input; 28Vdc Output; 350W Output

Feature Specifications

Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions. See Feature Descriptions for additional information.

Parameter Device Symbol Min Typ Max Unit

Remote On/Off Signal Interface

(VIN=V
Signal referenced to V

Negative Logic: device code suffix “1”
Logic Low = module On, Logic High = module Off

Positive Logic: No device code suffix required
Logic Low = module Off, Logic High = module On

Logic Low - Remote On/Off Current All I
Logic Low - On/Off Voltage All V
Logic High Voltage – (Typ = Open Collector) All V
Logic High maximum allowable leakage current All I

Turn-On Delay and Rise Times

(Vin=V

Case 1: T

application of V

Case 2: T
application of Remote On/Off from Off to On with V
already applied for at least one second.

T

rise

of V

Output Voltage Overshoot

(IO=80% of I

Output Voltage Adjustment
(See Feature Descriptions):

Output Voltage Remote-sense Range
(only for No Trim or Trim down application )

Output Voltage Set-point Adjustment Range (trim) All V

Output Overvoltage Protection

Over Temperature Protection

(See Feature Descriptions)

Input Under Voltage Lockout V

Input Over voltage Lockout V

IN, min

in,nom

to V

, IO=I

delay

delay

; open collector or equivalent,

IN, max

O, max

terminal)

IN-

, Tc=25C)

= Time until VO = 10% of V

with Remote On/Off set to ON,

in

= Time until VO = 10% of V

= time for VO to rise from 10% of V

.

O,set

, Tc =25°C)

O, max

Turn-on Threshold All

Turn-off Threshold All

Turn-on Threshold All

Turn-off Threshold All

from

O,set

O,set

O,set

to 90%

from

in

All T

All T

All T

All V

All V

All T

Hysteresis All

Hysteresis All

on/off

on/off

on/off

on/off

85 ms

delay

delay

rise

  1.0 mA

0



 





25 30 ms

25

5 V

1.2 Vdc

50 A



3 % V

sense

16.8

trim

O, limit

ref

IN, UVLO

IN, OVLO

__

34


17 18 Vdc

15 16 Vdc

1.5 Vdc



41 42

--- 2 --- Vdc

__

__



110

2 %V

32.0 Vdc

38 Vdc


39 41 V



dc

ms

o,nom

°C

dc

Vdc

O, set

LINEAGE POWER 4

Data Sheet

O

/Off

O

G

O

O

G

August 9, 2010

JNC350R Power Modules; DC-DC Converters

18 – 36 Vdc Input; 28Vdc Output; 350W Output

Characteristic Curves

The following figures provide typical characteristics for the JNC350R (28V, 12.5A) at 25ºC. The figures are identical
for either positive or negative Remote On/Off logic.

95

Vin=1 8V

90

85

80

75

EFFICIENCY (%)

70

0 2.5 5 7.5 10 12.5

Vin=2 4V

OUTPUT CURRENT, Io (A) TIME, t (20ms/div)

Vin=36V

Figure 1. Converter Efficiency versus Output
Current.

E

LTA

(V) (10V/div)

O

UTPUTV

E

LTA

(V) (2V/div) V

V

n

ON/OFF

V

Figure 4. Typical Start-Up Using negative Remote
On/Off; C

= 470µF.

o,ext

(V) (50mV/div)

O

V

OUTPUT VOLTAGE

TIME, t (1s/div)

Figure 2. Typical Output Ripple and Noise at Room
Temperature and 24Vin; I

(V) (200mV/div)

O

(A) (5A/div) V

O

I

OUTPUT CURRENT OUTPUT VOLTAGE

= I

o,max

; C

o

TIME, t (1ms/div)

= 470µF.

o,ext

Figure 3. Standard JNC350R Transient Response to
Dynamic Load Change from 25% to 50% to 25% of
Full Load at Room Temperature and 24 Vdc Input;

0.1A/uS, C

= 470µF

o,ext

(V) (10V/div)

O

(V) (10V/div) V

in

INPUT VOLTAGE OUTPUT VOLTAGE

V

TIME, t (20ms/div)

Figure 5. Typical Start-Up from V
prior to V

(V) (200mV/div)

(A) (5A/div) V

I

OUTPUT CURRENT OUTPUT VOLTAGE

step; C

IN

O

O

= 470µF.

o,ext

TIME, t (1ms/div)

, on/off enabled

IN

Figure 6. Standard JNC350R Transient Response to
Dynamic Load Change from 50% to 75% to 50% of
Full Load at Room Temperature and 24 Vdc Input;

0.1A/uS, C

= 470µF

o,ext

LINEAGE POWER 5

Data Sheet
August 9, 2010

18 – 36 Vdc Input; 28Vdc Output; 350W Output

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.

JNC350R Power Modules; DC-DC Converters

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
470F Low ESR aluminum capacitor, C
close to the power module helps ensure the stability
of the unit. Consult the factory for further application
guidelines

Output Capacitance

The JNC350R power module requires a minimum
output capacitance of 440µF Low ESR aluminum
capacitor, C
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.

to ensure stable operation over the full

out

, mounted

IN

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 Effici ency Tes t
Setup.

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. 60950-1­03, EN60950-1 and VDE 0805:2001-12.

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 V
are grounded simultaneously.

 All flammable materials used in the

manufacturing of these modules are rated 94V-0,
or tested to the UL60950 A.2 for reduced
thickness.

 The input to these units is to be provided with a

maximum 30 A fast-acting or fuse in the
unearthed lead.

(+) and VO(+)

I

LINEAGE POWER 6

Data Sheet
August 9, 2010

JNC350R Power Modules; DC-DC Converters

18 – 36 Vdc Input; 28Vdc Output; 350W Output

Feature Description

Remote On/Off

Two remote on/off options are available. Positive logic
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, device code suffix “1”, turns the
module off during a logic high and on during a logic
low.

To turn the power module on and off, the user must
supply a switch (open collector or equivalent) to
control the voltage (V
terminal and the V
low is 0V  V

 1.2V. The maximum I

on/off

logic low is 1mA, the switch should be maintain a
logic low level whilst sinking this current.

During a logic high, the typical maximum V
generated by the module is 5V, and the maximum
allowable leakage current at V

If not using the remote on/off feature:

For positive logic, leave the ON/OFF pin open.

For negative logic, short the ON/OFF pin to V

) between the ON/OFF

on/off

(-) terminal (see Figure 10). Logic

IN

= 5V is 50A.

on/off

on/off

on/off

during a

(-).

IN

An OCP auto-restart option (code = 3 or 4, see Table

2) is also available in a case where an auto recovery
is required. If over-current persists for few milli­seconds, the module will shut down and auto restart
until the fault condition is corrected. If the output
overload condition still exists when the module
restarts, it will shut down again. This operation will
continue indefinitely, until the over-current condition is
corrected.

Over-Voltage Protection (OVP)

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.

An OVP auto-restart option (code = 3, see Table 2) is
also available in a case where an auto recovery is
required. Once the module has shutdown, after a
period of approximately 4.5 seconds, the module will
restart. 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.

Remote sense

Remote sense minimizes the effects of distribution
losses by regulating the voltage at the remote-sense
connection (see Figure 11). For No Trim or Trim down
application, the voltage between the remote-sense pin
and the output terminal must not exceed the output
voltage sense range given in the Feature
Specifications table i.e.: SENSE(+)–Vo(+) 2% V

The voltage between the Vo(+) and Vo(-) terminals
must not exceed the minimum output overvoltage

Figure 10. Circuit configuration for using Remote
On/Off Implementation.

Over-Current Protection (OCP)

To provide protection in a fault output overload
condition, the module is equipped with internal current
limiting protection circuitry, and can endure over­current transient overloads depending upon the
duration and amplitude of the overload. An internal
buffer measures the relative product of the duration
and amplitude of the overload and allows operation
until a limit threshold is
overloads, the module
for a longer transient
amplitude is larger, the
a shorter period of time.

A latching shutdown option is standard. If over-current
persists for beyond the overload buffer, the module
will shut down and remain off until the module is reset
by either cycling the input power or by toggling the
on/off pin for one second.

LINEAGE POWER 7

reached. For lower amplitude

will operate without shutdown

overload. If the overload

module will reach shutdown in

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

11. Do not connect SENSE(-) to the Vo(-) or Rload(-)
as there is a 0 connection internal to the module. If
not using the remote-sense feature to regulate the
output at the point of load, then connect SENSE(+) to
Vo(+).

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.

o,nom

.

Data Sheet
August 9, 2010

18 – 36 Vdc Input; 28Vdc Output; 350W Output

Feature Description (continued)

Figure 11. Effective Circuit Configuration for
Single-Module Remote-Sense Operation Output
Voltage.

Output Voltage Programming

Trimming allows the user to increase or decrease the
output voltage set point of a module. The trim resistor
should be positioned close to the module. Certain
restrictions apply to the input voltage lower limit when
trimming the output voltage to the maximum. See
Figure 12 for the allowed input to output range when
using trim. If not using the trim down feature, leave
the TRIM pin open.

34

32
30

28
)
V

26
(

t
u

24
o
V

22

20

18

16

14

16 18 20 22 24 26 28 30 32 34 36 38

Figure 12. Output voltage trim limits vs. Input
Voltage.

Modules without the –T Option

Trim Down – Decrease Output Voltage

Trimming down is accomplished by connecting an
external resistor between the TRIM pin and the
SENSE(-) pin. With an external resistor (R
between the TRIM and SENSE(-) pins, the output
voltage set point (V
The following equation determines the required
external-resistor value to obtain a percentage output
voltage change of %.

For output voltages: 28V

Where,



= Desired output voltage set point (V).

V

desired

Upper Trim Limit

o,adj

100



 kR downadj 2

,







%



VV



desirednomo

,

nomo

V

Lower Trim Limit

Vin (V)

)

adj-down

) decreases (see Figure 13).








100%



JNC350R Power Modules; DC-DC Converters

Figure 13. Circuit Configuration to Decrease
Output Voltage, Standard JNC350R.

Trim Up – Increase Output Voltage

Trimming up is accomplished by connecting external
resistor between the SENSE(+) pin and TRIM
pin.With an external resistor

between the SENSE(+) and TRIM pins
voltage set point (

The following equation determines the required
external-resistor value to obtain a percentage output
voltage change of %.

For output voltages: 28V

 k

R

upadj



Where,



V

= Desired output voltage set point (V).

desired

Figure 14. Circuit Configuration to Increase
Output Voltage, Standard JNC350R.

V

o,adj

V



nomO

,




VV



,

nomo

V

(Radj-up) connected

, the output

) increases (see Figure 14).

%)100(





%225.1



,

nomodesired

100%



%



%)2(100(










LINEAGE POWER 8

Data Sheet
August 9, 2010

18 – 36 Vdc Input; 28Vdc Output; 350W Output

Feature Description (continued)

Examples:

To trim down the output of a nominal 28V module to

16.8V

8.1628



VV

% 



28

V

% = 40

100




40



R

To trim up the output of a nominal 28V module to

30.8V

% = 10

R

Modules with the –T Option

Trim Down – Decrease Output Voltage

With an external resistor (R
and SENSE(+) pins, the output voltage set point
(V
equation determines the required external-resistor
value to obtain a percentage output voltage change of
%.

For output voltages: 28V

= 0.5 k

adj - down

% 





kRupadj

= 239.4 k

adj - up

) decreases (see Figure 15). The following

o,adj



V

28










 kR downadj 2.111




Where,



VV

,



V

= Desired output voltage set point (V).

desired

,

nomo

V

100





 kR downadj 2




VV

288.30
100



)10100(28



10225.1

45.10631





%

desirednomo





)102(100(



10

adj-down




) between the TRIM








100%



JNC350R Power Modules; DC-DC Converters

Figure 15. Circuit Configuration to Decrease
Output Voltage, JNC350R-T option.

Trim Up – Increase Output Voltage

With an external resistor (Radj-up) connected between
the SENSE(-) and TRIM pins

V

point (

The following equation determines the required
external-resistor value to obtain a percentage output
voltage change of %.

For output voltages: 28V

Where,

V

desired

Figure 16. Circuit Configuration to Increase
Output Voltage, JNC350Rx-T option.

) increases (see Figure 16).

o,adj

5.488





 kR upadj






= Desired output voltage set point (V).






%





VV

,

nomo

V

, the output voltage set



,

nomodesired

100%



LINEAGE POWER 9

Data Sheet
August 9, 2010

18 – 36 Vdc Input; 28Vdc Output; 350W Output

Feature Description (continued)

Examples:

To trim down the output of a nominal 28V JNC350-T
module to 16.8V

8.1628



VV

% 



28

V

% = 40






R

To trim up the output of a nominal 28V JNC350-T
module to 30.8V

% = 10

R

Active Voltage Programming

For both the JNC350Rx and JNC350Rx-T, a Digital­Analog converter (DAC), capable of both sourcing
and sinking current, can be used to actively set the
output voltage, as shown in Figure 17. The value of
R
the DAC and the desired values for trim-up and trim­down
technical representative to obtain more details on the
selection for this resistor.

Figure 17. Circuit Configuration to Actively Adjust
the Output Voltage.

Tunable Loop™

The JNC350Rx-T modules have a new feature that
optimizes transient response of the module called
Tunable Loop™.

= 154.5 k

adj - down

% 



 kR upadj

= 48.8 k

adj - up

will be dependent on the voltage step and range of

G

%. Please contact your Lineage Power



28

V







10



100

45.10631

 kR downadj 2.111

40

288.30

VV

100

5.488
















JNC350R Power Modules; DC-DC Converters

External capacitors are usually added to the output of
the module for two reasons: to reduce output ripple
and noise and to reduce output voltage deviations
from the steady-state value in the presence of
dynamic load current changes. Adding external
capacitance however affects the voltage control loop
of the module, typically causing the loop to slow down
with sluggish response. Larger values of external
capacitance could also cause the module to become
unstable.

The Tunable Loop
adjust the voltage control loop to match the filter
network connected to the output of the module. The
Tunable Loop
series R-C between the SENSE(+) and TRIM pins of
the module, as shown in Figure 18. This R-C allows
the user to externally adjust the voltage loop feedback
compensation of the module.

Figure 18. Circuit diagram showing connection of

and C

R

TUNE

module.

Recommended values of R
output capacitor combinations are given in Tables 1
and 2. Table 1 shows the recommended values of
R

and C

TUNE

capacitors up to 8000F that might be needed for an
application to meet output ripple and noise
requirements. Selecting R
Table 2 will ensure stable operation of the module
In applications with tight output voltage limits in the
presence of dynamic current loading, additional
output capacitance will be required. Table 2 lists
recommended values of R
meet 2% output voltage deviation limits for some
common output voltages in the presence of a 6A to
12A step change (50% of full load), with an input
voltage of 24V.

Table 1. General recommended values of of R
and C

TUNE

ceramic capacitor combinations.

Cout(µF) 1320 2200 4400 6600 8000

R

(k

TUNE

C

(pF) 470 6800 10000 10000 10000

TUNE

TM

allows the user to externally

TM

is implemented by connecting a

to tune the control loop of the

TUNE

and C

TUNE

for different values of ceramic output

TUNE

and C

TUNE

and C

TUNE

for V

=28V and various external

out

1000 100 36.5 36.5 36.5

for different

TUNE

according to

TUNE

in order to

TUNE

TUNE

LINEAGE POWER 10

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.

Vo 32V 28V 25V 22V 19V 16.8V

Co(uF)

R

(k

TUNE

C

(pF) 470 1500 1500 2200 3300 6800

TUNE

V(mV)

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.

and C

TUNE

18 – 36 Vdc Input; 28Vdc Output; 350W Output

TUNE

1320 1320 1320 1320 1320 1540
1000 301 301 301 301 301

340 320 280 280 260 290

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.

) occurs at the position indicated in

REF

for cold plate. The output power

REF

temperature of the power

REF

JNC350R Power Modules; DC-DC Converters

Figure 19. Case (T

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.

375

350

325

300

Output Power (W)

275

250

20 30 40 50 60 70 80 90 100

Figure 20. Output Power Derating for JNC350R in
Conduction cooling (cold plate) applications;
T

<70ºC in vicinity of module interior; VIN = 24V.

a

) Temperature Measurement

REF

Baseplate Temperature (C)

LINEAGE POWER 11

Data Sheet
August 9, 2010

18 – 36 Vdc Input; 28Vdc Output; 350W Output

Layout Considerations

The JNC350R power module series are aluminum
base board packaged style, as such; component
clearance between the bottom of the power module
and the mounting (Host) board is limited. Avoid
placing copper areas on the outer layer directly
underneath the power module.

Post Solder Cleaning and Drying
Considerations

Post solder cleaning is usually the final circuit-board
assembly process prior to electrical board testing. The
result of inadequate cleaning and drying can affect
both the reliability of a power module and the
testability of the finished circuit-board assembly. For
guidance on appropriate soldering, cleaning and

drying procedures, refer to Lineage Power Board
Mounted Power Modules: Soldering and Cleaning

Application Note.

JNC350R Power Modules; DC-DC Converters

Through-Hole Lead-Free Soldering
Information

The RoHS-compliant through-hole products use the
SAC (Sn/Ag/Cu) Pb-free solder and RoHS-compliant
components. They are designed to be processed
through single or dual wave soldering machines. The
pins have an RoHS-compliant finish that is compatible
with both Pb and Pb-free wave soldering processes.
A maximum preheat rate of 3C/s is suggested. The
wave preheat process should be such that the
temperature of the power module board is kept below
210C. For Pb solder, the recommended pot
temperature is 260C, while the Pb-free solder pot is
270C max. Not all RoHS-compliant through-hole
products can be processed with paste-through-hole
Pb or Pb-free reflow process. Before attempting this
soldering process, please consult with your Lineage
Power representative for more details.

LINEAGE POWER 12

Data Sheet
August 9, 2010

JNC350R Power Modules; DC-DC Converters

18 – 36 Vdc Input; 28Vdc Output; 350W Output

EMC Considerations

The filter circuit schematic and plots in Figure 21 shows a suggested configuration as tested to meet the conducted
emission limits of EN55022 Class B.

Note: Customer is ultimately responsible for the proper selection, component rating and verification of the suggested
parts based on the end application.

Symbol Component Description
C1 – C5 SMD Ceramic Capacitor: 1000nF/100V/X7R/1210
C6 SMD Ceramic Capacitor : 100nF/100V/X7R/1206
L1, L2 CM inductor-single phase: 473uH-14A-R5K-1*25.4*12.7mm
C8 – C11 SMD Ceramic Capacitor: 0.22uF/630V/X7R/2220, meet 1kV endure voltage requirement.
C7 Electrolytic capacitor: 470uF, 100V
C12 Electrolytic capacitor: 470uF, 35V
L3 CM inductor-single phase core: 17uH- R7K-25*15*12; winding: 5TS

Vin+: Vin-:

Figure 21. EMC considerations .

For further information on designing for EMC compliance, please refer to the FLTR100V20 data sheet (FDS01­077EPS).

LINEAGE POWER 13

Data Sheet
August 9, 2010

JNC350R Power Modules; DC-DC Converters

18 – 36 Vdc Input; 28Vdc Output; 350W Output

Mechanical Outline for Through-Hole Module

Dimensions are in inches and [millimeters].
Tolerances: x.xx in.  0.02 in. [x.x mm  0.5 mm] (Unless otherwise indicated)
x.xxx in  0.010 in. [x.xx mm  0.25 mm]

TOP VIEW

SIDE VIEW

BOTTOM

VIEW

Pin Description Pin Description Pin Description

1 Vin (+) 4 Vin (–) 7 Trim
2 On/Off 5 Vout (–) 8 Sense (+)
3 Baseplate 6 Sense (-) 9 Vout (+)

LINEAGE POWER 14

Data Sheet
August 9, 2010

JNC350R Power Modules; DC-DC Converters

18 – 36 Vdc Input; 28Vdc Output; 350W Output

Recommended Pad Layout for Through Hole Module

Dimensions are in inches and [millimeters].
Tolerances: x.xx in.  0.02 in. [x.x mm  0.5 mm] (Unless otherwise indicated)
x.xxx in  0.010 in. [x.xx mm  0.25 mm]

LINEAGE POWER 15

Data Sheet

a

©

August 9, 2010

JNC350R Power Modules; DC-DC Converters

18 – 36 Vdc Input; 28Vdc Output; 350W Output

Ordering Information

Please contact your Lineage Power Sales Representative for pricing, availability and optional features.

Table 1. Device Code

Input Voltage

Output

Voltage

24V (18-36Vdc) 28V 12.5A 91% Through hole JNC350R41Z CC109154927

24V (18-36Vdc) 28V 12.5A 91% Through hole JNC350R641-18Z CC109161262

24V (18-36Vdc) 28V 12.5A 91% Through hole JNC350R41-TZ CC109158457

Table 2. Device Options

Output

Current

Efficiency

Connector

Type

Product codes Comcodes

Asia-Pacific Headquarters

Tel: [phone]

World Wide Headquarters
Lineage Power Corporation

601 Shiloh Road, Plano, TX 75074, USA
[phone]
(Outside U.S.A.: [phone])

www.lineagepower.com
e-mail: [e-mail]

Lineage Power reserves the right to make changes to the product(s) or information contained herein wi thout notice. No liability is assumed as a result of their use or

pplication. No rights under any patent accompany the sale of any such product(s) or information.

Lineage Power DC-DC products are protected under various patents. Information on these patents is available at www.lineagepower.com/patents.

2009 Lineage Power Corporation, (Plano, Texas) All International Rights Reserved.

Europe, Middle-East and Africa Headquarters

Tel: [phone]

India Headquar t er s

Tel: [phone]

Document No: DS10-002 ver 1.01

PDF name: JNC350R.pdf