NMT0572SC 데이터 시트보기 (PDF) - Murata Manufacturing

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NMT0572SC

Triple Output 3W DC/DC Converters

Murata Manufacturing 

www.murata-ps.com

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

Nominal

Output

Voltage

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

　

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/support

KDC_NMT.E04 Page 1 of 4

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