additional external load capacitance the rise time of the input voltage will determine the maximum external
capacitance value for guaranteed start up. The slower the rise time of the input voltage the greater the maximum value of the
additional external capacitance for reliable start up.
INPUT CHARACTERISTICS
Parameter
Voltage range
Reflected ripple current
Conditions
Continuous operation, 5V input types
Continuous operation, 2V input types
5V input types
2V input types
MIN.
4.5
0.8
TYP.
5
2
40
30
MAX.
5.5
3.2
Units
V
mA p-p
OUTPUT CHARACTERISTICS
Parameter
Rated power
3
Conditions
T
A
=-40°C to 85°C
NTHXX05, 0% to 00% load
All other variants, 0% to 00% load
High V
IN
to low V
IN
0% load to rated load, 5V output types
0% load to rated load, all other output types
BW=DC to 20MHz, 5V output types
BW=DC to 20MHz, 9V output types
BW=DC to 20MHz, 2V output types
BW=DC to 20MHz, 5V output types
MIN.
-5.0
-5.0
TYP.
MAX.
2.0
7.5
5.0
.2
0
0
200
50
50
50
Units
W
%
%/%
%
Voltage set point
accuracy
Line regulation
Load regulation
2
Ripple & noise
DESCRIPTION
The NTH series of miniature surface mounted
DC/DC converters employ leadframe technol-
ogy and transfer moulding techniques to bring
all of the benefits of IC style packaging to hybrid
circuitry. The component lead termination of this
product range is lead-free compatible, therefore
the converter can be soldered in a lead-free
soldering process. Co-planarity of the lead posi-
tions is based upon IEC 9-6:990. The devices
are suitable for all applications where high volume
production is envisaged.
Parameter
Isolation test voltage
Resistance
.0
5.0
3.0
50
00
80
70
mV p-p
ISOLATION CHARACTERISTICS
Conditions
Flash tested for second
Viso= 500VDC
MIN.
000
TYP.
0
MAX.
Units
VDC
GΩ
GENERAL CHARACTERISTICS
Parameter
Switching frequency
Conditions
All 5V input types
All 2V input types
MIN.
TYP.
95
90
MAX.
Units
kHz
ABSOLUTE MAXIMUM RATINGS
Short-circuit protection
4
Lead temperature .5mm from case for 0 seconds
Internal power dissipation
Input voltage V
IN
, NTH05 types
Input voltage V
IN
, NTH2 types
second
300°C
550mW
7V
5V
. If components are required in tape and reel format suffix order code code with -R, e.g. NTH0505MC-R.
2. Calculated using MIL-HDBK-27F with nominal input voltage at full load.
3. See derating graph.
4. Supply voltage must be discontinued at the end of the short circuit duration.
All specifications typical at T
A
=25°C, nominal input voltage and rated output current unless otherwise specified.
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KDC_NTHC.2
Page of 4
NTH SERIES
Isolated 2W Dual Output SM DC/DC Converters
TEMPERATURE CHARACTERISTICS
Parameter
Specification
Storage
Case temperature rise above
ambient
Cooling
Conditions
All output types
5V output types
All other output types
Free air convection
MIN.
-40
-55
TYP.
MAX.
85
25
Units
°C
30
25
TECHNICAL NOTES
ISOLATION VOLTAGE
‘Hi Pot Test’, ‘Flash Tested’, ‘Withstand Voltage’, ‘Proof Voltage’, ‘Dielectric Withstand Voltage’ & ‘Isolation Test Voltage’ are all terms that relate to the same thing, a test voltage,
applied for a specified time, across a component designed to provide electrical isolation, to verify the integrity of that isolation.
C&D Technologies NTH series of DC/DC converters are all 00% production tested at their stated isolation voltage. This is kVDC for second.
A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?”
For a part holding no specific agency approvals, such as the NTH series, both input and output should normally be maintained within SELV limits i.e. less than 42.4V peak, or
60VDC. The isolation test voltage represents a measure of immunity to transient voltages and the part should never be used as an element of a safety isolation system. The part
could be expected to function correctly with several hundred volts offset applied continuously across the isolation barrier; but then the circuitry on both sides of the barrier must
be regarded as operating at an unsafe voltage and further isolation/insulation systems must form a barrier between these circuits and any user-accessible circuitry according to
safety standard requirements.
REPEATED HIGH-VOLTAGE ISOLATION TESTING
It is well known that repeated high-voltage isolation testing of a barrier component can actually degrade isolation capability, to a lesser or greater degree depending on materials,
construction and environment. The NTH series has toroidal isolation transformers, with no additional insulation between primary and secondary windings of enameled wire. While
parts can be expected to withstand several times the stated test voltage, the isolation capability does depend on the wire insulation. Any material, including this enamel (typically
polyurethane) is susceptible to eventual chemical degradation when subject to very high applied voltages thus implying that the number of tests should be strictly limited. We
therefore strongly advise against repeated high voltage isolation testing, but if it is absolutely required, that the voltage be reduced by 20% from specified test voltage.
This consideration equally applies to agency recognized parts rated for better than functional isolation where the wire enamel insulation is always supplemented by a further
insulation system of physical spacing or barriers.
TOLERANCE ENVELOPE
5V output types
+7.5%
+3.75%
Typica
l
All other output types
+5%
Output Voltage
0%
Output Voltage
Load
Line
+2.5%
-.25%
+.5%
-2.0%
0
Typical L
o
ad Line
+2.0%
-.5%
0
75
50
25
Output Load Current (%)
-5.0%
00
75
50
25
Output Load Current (%)
-5.0%
00
RoHS COMPLIANCE INFORMATION
This series is compatible with RoHS soldering
systems with a peak reflow solder temperature
of 245ºC and time above liquidus of 27ºC
for 80 seconds. The pin termination finish on
this product series is Gold, plating thickness
0. microns minimum. The series is backward
compatible with Sn/Pb soldering systems.
TEMPERATURE DERATING GRAPH
3.0
Output Power (W)
2.0
.0
0
-40
85°C
Safe Operating Area
For further information, please visit www.cd4power.com/rohs
00
50
0
Ambient Temperature (°C)
50
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KDC_NTHC.2
Page 2 of 4
NTH SERIES
Isolated 2W Dual Output SM DC/DC Converters
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
PIN CONNECTIONS
Pin
3
5
9
Function
-V
IN
+V
IN
NA
-V
OUT
OV
3
4
6
8
22
24
26
+V
OUT
NA
NA
-V
OUT
NC
NA
NA
NA - Not available for electrical connection.
NC - No internal electrical connection.-
All dimensions in inches ±0.0 (mm ±0.25mm). All pins on a 0. (2.54) pitch.
Weight: 2.75g
RECOMMENDED FOOTPRINT DETAILS
TUBE OUTLINE DIMENSIONS
All dimensions in inches ±0.02 (mm±0.5)
All dimensions in inches ±0.02 (mm±0.5).
Tube length : 8.70±0.079 (475±2.0).
Tube Quantity : 25
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KDC_NTHC.2
Page 3 of 4
NTH SERIES
Isolated 2W Dual Output SM DC/DC Converters
TAPE & REEL SPECIFICATIONS
REEL OUTLINE DIMENSIONS
TAPE OUTLINE DIMENSIONS
All dimensions in inches ±0.02 (mm±0.5)
All dimensions in inches ±0.02 (mm±0.5)
REEL PACKAGING DETAILS
All dimensions in inches ±0.02 (mm±0.5)
Reel Quantity : 400
C&D Technologies (NCL) Limited reserves the right to alter or improve the specification, internal design or manufacturing
process at any time, without notice. Please check with your supplier or visit our website to ensure that you have the current
and complete specification for your product before use.
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