GE
JNC350R Power Modules; DC-DC Converters
18 – 36 Vdc Input; 28Vdc Output; 350W Output
Features
Data Sheet
Compliant to RoHS EU Directive 2011/65/EU (Z versions)
Compliant to RoHS EU Directive 2011/65/EU under
exemption 7b (Lead solder exemption). Exemption 7b
will expire after June 1, 2016 at which time this produc
twill no longer be RoHS compliant (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”)
RoHS Compliant
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
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)
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
TM
, which allows the 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.
October 5, 2015
©2012 General Electric Company. All rights reserved.
GE
JNC350R Power Modules; DC-DC Converters
18 – 36 Vdc Input; 28Vdc Output; 350W Output
Absolute Maximum Ratings
Data Sheet
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
Input Voltage
Continuous
Transient, operational (≤100 ms)
Operating Ambient Temperature
Please contact your GE Sales representative for information
on thermal derating when using forced airflow.
Operating Case Temperature
(See Thermal Considerations section, Figure 20)
Storage Temperature
I/O Isolation Voltage: Input to Case, Input to Output
Output to Case
All
All
V
IN
V
IN,trans
-0.3
-0.3
40
50
V
dc
V
dc
Device
Symbol
Min
Max
Unit
All
Ta
-40
85
°C
All
All
All
All
Tc
T
stg
-40
-55
100
125
1500
500
°C
°C
V
dc
V
dc
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
Parameter
Operating Input Voltage
(see Figure 12 for V
IN, min
when using trim-up feature)
Maximum Input Current
(V
IN
=18V to 36V, I
O
=I
O, max
)
Inrush Transient
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 12μH source impedance; V
IN
=0V to 36V, I
O
=
I
Omax
; see Figure 7)
Device
All
All
All
All
Symbol
V
IN
I
IN,max
I
2
t
Min
18
Typ
24
Max
36
25
2
25
Unit
V
dc
A
dc
A
2
s
mA
p-p
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 fast-acting 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.
October 5, 2015
©2012 General Electric Company. All rights reserved.
Page 2
GE
JNC350R Power Modules; DC-DC Converters
18 – 36 Vdc Input; 28Vdc Output; 350W Output
Electrical Specifications
(continued)
Parameter
Output Voltage Set-point
(V
IN
=V
IN,nom
, I
O
=I
O, max
, T
c
=25°C)
Output Voltage
1
(Over all operating input voltage, resistive load, and
temperature conditions until end of life)
Output Regulation
Line (V
IN
=V
IN, min
to V
IN, max
)
Load (I
O
=I
O, min
to I
O, max
)
1
Temperature (T
c
= -40ºC to +100ºC)
Output Ripple and Noise on nominal output
(V
IN
=V
IN, nom
and I
O
=I
O, min
to I
O, max
)
RMS (5Hz to 20MHz bandwidth)
Peak-to-Peak (5Hz to 20MHz bandwidth)
2
External Capacitance
(ESR > 50 mΩ)
3
Without the Tunable Loop™
(ESR
MAX
= 80mΩ)
3
With the Tunable Loop™
(ESR > 50 mΩ)
4
Output Current
2
Output Current Limit Inception
Output Short Circuit Current (V
O
≤
0.25V
dc
)
Efficiency
V
IN
=V
IN, nom
, T
c
=25°C I
O
=I
O, max ,
V
O
= V
O,set
Switching Frequency
Dynamic Load Response
All
All
All, except -
T
-T
-T
All
All
All
All
C
O
C
O
C
O
I
o
I
O, lim
I
O, sc
η
f
sw
440
440
440
0
13.1
All
All
All
Device
All
Symbol
V
O, set
Min
27.5
Data Sheet
Typ
28
Max
28.5
Unit
V
dc
All
V
O
27.15
28.85
V
dc
0.1
0.1
0.5
0.2
0.2
1.5
%V
o,set
%V
o,set
%V
o,set
45
80
55
200
6500
470
8,000
12.5
mV
rms
mV
pk-pk
μF
μF
μF
A
dc
A
dc
A
rms
%
kHz
17.5
30
91
300
(Io/t=1A/10s; V
in
=V
in
,
nom
; T
c
=25°C; Tested with
a 470
μF
aluminum and a 10 µF ceramic
capacitor across the load.)
Load Change from Io= 50% to 75% of Io,max:
Peak Deviation
All
%V
O, set
V
pk
2
Settling Time (Vo<10% peak deviation)
t
s
1.5
ms
Load Change from Io= 25% to 50% of Io,max:
%V
O, set
V
pk
2
Peak Deviation
t
s
1.5
ms
Settling Time (Vo<10% peak deviation)
1. For Vin
≤
19V, and case temperatures
≥
85°C, output voltage regulation is relaxed to -2
.
5%V
o,set
.
2. When operating at output current between 0A
dc
and 1A
dc
, output ripple may exceed maximum pk-pk limits.
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
O
.
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.
Isolation Specifications
Parameter
Isolation Capacitance
Isolation Resistance
Symbol
C
iso
R
iso
Min
10
Typ
15
Max
Unit
nF
MΩ
General Specifications
Parameter
Calculated Reliability based upon Telcordia SR-332
Issue 2: Method
I
Case 3 (I
O
=80%I
O, max
, T
A
=40°C,
airflow = 200 lfm, 90% confidence)
Weight
Device
All
Symbol
FIT
MTBF
All
Min
Typ
Max
Unit
10
9
/Hours
Hours
g
oz.
341.8
2,925,365
78
2.8
October 5, 2015
©2012 General Electric Company. All rights reserved.
Page 3
GE
JNC350R Power Modules; DC-DC Converters
18 – 36 Vdc Input; 28Vdc Output; 350W Output
Feature Specifications
Data Sheet
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
See Feature Descriptions for additional information.
Parameter
Remote On/Off Signal Interface
(V
IN
=V
IN, min
to V
IN, max
; open collector or equivalent,
Signal referenced to V
IN-
terminal)
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
Logic Low - On/Off Voltage
Logic High Voltage – (Typ = Open Collector)
Logic High maximum allowable leakage current
Turn-On Delay and Rise Times
(V
in
=V
in,nom
, I
O
=I
O, max
, T
c
=25C)
Case 1: T
delay
= Time until V
O
= 10% of V
O,set
from
application of V
in
with Remote On/Off set to ON,
Case 2: T
delay
= Time until V
O
= 10% of V
O,set
from
application of Remote On/Off from Off to On with V
in
already applied for at least one second.
T
rise
= time for V
O
to rise from 10% of V
O,set
to 90% of
V
O,set
.
Output Voltage Overshoot
(I
O
=80% of I
O, max
, T
c
=25°C)
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)
Output Overvoltage Protection
Over Temperature Protection
(See Feature Descriptions)
Input Under Voltage Lockout
Turn-on Threshold
Turn-off Threshold
Hysteresis
Input Over voltage Lockout
Turn-on Threshold
Turn-off Threshold
Hysteresis
All
All
All
All
All
All
V
IN, OVLO
41
---
39
42
2
41
---
V
dc
V
dc
V
dc
15
V
IN, UVLO
17
16
1.5
18
V
dc
V
dc
V
dc
All
All
All
All
V
sense
V
trim
V
O, limit
T
ref
__
16.8
34
__
__
110
All
All
All
All
I
on/off
V
on/off
V
on/off
I
on/off
0
1.0
1.2
5
50
mA
V
dc
V
dc
μA
Device
Symbol
Min
Typ
Max
Unit
All
All
All
T
delay
T
delay
T
rise
85
25
25
30
3
ms
ms
ms
% V
O, set
2
32.0
38
%V
o,nom
V
dc
V
dc
°C
October 5, 2015
©2012 General Electric Company. All rights reserved.
Page 4
GE
JNC350R Power Modules; DC-DC Converters
18 – 36 Vdc Input; 28Vdc Output; 350W Output
Characteristic Curves
Data Sheet
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=18V
90
Vin=36V
85
80
75
70
0
2.5
5
7.5
10
12.5
Vin=24V
OUTPUT CURRENT, I
o
(A)
On/Off VOLTAGE OUTPUTVOLTAGE
V
O
(V) (10V/div)
V
ON/OFF
(V) (2V/div)
EFFICIENCY (%)
TIME, t (20ms/div)
Figure 1. Converter Efficiency versus Output Current.
Figure 4. Typical Start-Up Using negative Remote On/Off;
C
o,ext
= 470µF.
INPUT VOLTAGE OUTPUT VOLTAGE
V
O
(V) (10V/div)
V
in
(V) (10V/div)
OUTPUT VOLTAGE
V
O
(V) (50mV/div)
TIME, t (1s/div)
TIME, t (20ms/div)
Figure 2. Typical Output Ripple and Noise at Room
Temperature and 24Vin; I
o
= I
o,max
; C
o,ext
= 470µF.
Figure 5. Typical Start-Up from V
IN
, on/off enabled prior to
V
IN
step; C
o,ext
= 470µF.
TIME, t (1ms/div)
OUTPUT CURRENT OUTPUT VOLTAGE
V
O
(V) (200mV/div)
I
O
(A) (5A/div)
OUTPUT CURRENT OUTPUT VOLTAGE
I
O
(A) (5A/div) V
O
(V) (200mV/div)
TIME, t (1ms/div)
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
o,ext
= 470µF
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
o,ext
= 470µF
October 5, 2015
©2012 General Electric Company. All rights reserved.
Page 5
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