KDC_NMT Datasheet, PDF (1/4 Pages) Murata Manufacturing Co., Ltd. – Triple Output 3W DC/DC Converters

NMT Series
Triple Output 3W DC/DC Converters
FEATURES
RoHS compliant
Triple outputs (-24V, -48V & -72V)
Input/output isolation 1kVDC
Power sharing on outputs
Industrial temperature range
UL 94V-0 package material
Internal SMD construction
Toroidal magnetics
No external components required
Power density 1.65W/cm³
DESCRIPTION
The NMT series is a range of DC/DC convert-
ers offering three output voltages of -24V, -48V
and -72V from a single isolated 5V or 12V input
voltage. The product is designed for use with
telecommunications circuits requiring an on board
supply for the -72V RING-TIP connection service
generated from a nominal 5V or 12V DC input
supply rail. The device also offers battery level
voltages of -24V and -48V for access control and
data pump IC’s. The product is packaged in an
8 pin SIP case for minimum PCB footprint. The
rated power may be shared or drawn from any
one output providing the total output load does not
exceed 3W.
SELECTION GUIDE
Order Code
Nominal
Input
Voltage
Output
Rated
Output
Current
Output Current¹ Output Current²
MTTF³
Min. Load Full Load Min. Load Full Load
V
V
mA
mA
mA
mA kHrs
-VOUT1
-24
1.4
42
4.2
126
NMT0572SC
5
-VOUT2
-48
0.7
21
2.1
63
145
-VOUT3
-72
0.5
14
1.4
42
-VOUT1
-24
1.4
42
4.2
126
NMT1272SC
12
-VOUT2
-48
0.7
21
2.1
63
145
-VOUT3
-72
0.5
14
1.4
42
When operated with 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
Conditions
Voltage range
NMT0572SC
NMT1272SC
Ripple current (IRIPPLE)
NMT0572SC
NMT1272SC
Zero load input current
NMT0572SC, 0% output load
(ICCZL)
NMT1272SC, 0% output load
Min. Typ. Max. Units
4.5
5.0
5.5
V
10.8 12 13.2
85
mA
66
50
80
mA
27.5 50
OUTPUT CHARACTERISTICS
Parameter
Conditions
Total Rated Power (POUT) Total of all outputs or any single output
Single Channel Voltage Set POUT = 100mW
Point Accuracy
POUT = 3W
Output Voltage - VOUT1
POUT = 100mW
POUT = 3W
Output Voltage - VOUT2
POUT = 100mW
POUT = 3W
Output Voltage - VOUT3
POUT = 100mW
POUT = 3W
Line regulation
VIN = 90% to 110% of nominal
Load regulation
POUT = 100mW to 3W
Ripple & Noise
DC to 20MHz single channel (24V)
Min. Typ. Max. Units
0.1
3.0
W
0
10
%
-7.5
2.5
24
26.4
22.2
24.6
48
52.8
V
44.4
49.2
72
79.2
66.6
73.8
1.01 1.2
%
8
15
220 400 mV
ISOLATION CHARACTERISTICS
Parameter
Conditions
Isolation test voltage
Flash tested for 1 second
Isolation Capacitance
NMT0572SC, 1MHz, 1V
NMT1272SC, 1MHz, 1V
Insulation Resistance
1000VDC
Min. Typ. Max. Units
1000
VDC
65
pF
130
1
10
GΩ
Ḥ
For full details go to
www.murata-ps.com/rohs
ABSOLUTE MAXIMUM RATINGS
Short-circuit protection⁴
Lead temperature 1.5mm from case for 10 seconds
Input Voltage VIN, NMT0572SC
Input voltage VIN, NMT1272SC
1 second
300°C
7V
15V
1. Assuming all 3 channels are equally loaded.
2. Assuming only 1 channel is loaded.
3. Calculated using MIL-HDBK-217F with nominal input voltage at full load.
4. Supply voltage must be disconnected at the end of the short circuit duration.
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
www.murata-ps.com
Technical enquiries - email: [e-mail], tel: [phone]
KDC_NMTC.E02 Page 1 of 4