參數(shù)資料
型號(hào)： NMT1272S
廠商： CD TECHNOLOGIES INC
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： Triple Output 3W DC-DC Converters
中文描述： 3-OUTPUT 3 W DC-DC REG PWR SUPPLY MODULE
封裝： SIP-8/6
文件頁數(shù)： 1/2頁
文件大?。?/td> 143K
代理商： NMT1272S
SELECTION GUIDE
ISOLATION CHARACTERISTICS
Parameter
Isolation Voltage (V
ISOL
)
GENERAL CHARACTERISTICS
Parameter
Efficiency
Switching Frequency (f
OSC
)
1 Calculated using MIL-HDBK-217F with nominal input voltage at full load.
2 Assuming all 3 channels are equally loaded.
3 Assuming only 1 channel is loaded.
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.
FEATURES
I
Triple Outputs (–24V, –48V & –72V)
I
Toroidal Magnetics
I
Input/Output Isolation 1kVDC
I
Power Sharing on Outputs
I
Internal SMD Construction
I
Industrial Temperature Range
I
No External Components Required
I
Power Density 1.41W/cm
3
I
UL 94V-0 Package Material
DESCRIPTION
The NMT series is a range of DC-DC
converters 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.
Nominal
Input
Voltage
(V)
Rated
Output
Voltage
V
Output Current
2
MIN
Load
(mA)
Output Current
3
MIN
Load
(mA)
Full
Load
(mA)
Full
Load
(mA)
Output
MTTF
1
kHrs
Order Code
VO1
–24
1.4
42
4.2
126
NMT0572S
5
VO2
–48
0.7
21
2.1
63
145
VO3
–72
0.5
14
1.4
42
VO1
–24
1.4
42
4.2
126
NMT1272S
12
VO2
–48
0.7
21
2.1
63
145
VO3
–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.
Parameter
Voltage Range
(V
IN
)
Ripple Current
(I
RIPPLE
)
Zero Load Input NMT0572S, 0% output load
Current (I
CCZL
)
NMT1272S, 0% output load
OUTPUT CHARACTERISTICS
Conditions
NMT0572S
NMT1272S
NMT0572S
NMT1272S
MIN
4.5
10.8
TYP
5.0
12
85
66
50
27.5
MAX
5.5
13.2
Units
V
mA
80
50
mA
Parameter
Conditions
Total of all outputs or any
single output
P
OUT
= 100mW
P
OUT
= 3W
P
OUT
= 100mW
P
OUT
= 3W
P
OUT
= 100mW
P
OUT
= 3W
P
OUT
= 100mW
P
OUT
= 3W
VIN = 90% to 110%
of nominal
P
OUT
= 100mW to 3W
DC to 20MHz single
channel (24V)
MIN
TYP
MAX
Units
Total Rated Power (P
OUT
)
Single Channel Voltage
Setpoint Accuracy
0.1
0
–7.5
24.0
22.2
48.0
44.4
72.0
66.6
3.0
10
2.5
26.4
24.6
52.8
49.2
79.2
73.8
W
%
Output Voltage - VO1 (V
OUT
)
V
Output Voltage - VO2 (V
OUT
)
V
Output Voltage - VO3 (V
OUT
)
V
Line Regulation
Load Regulation
1.01
8
1.2
15
%
%
Ripple & Noise
0
220
400
mV
Conditions
Flash tested for 1 second
NMT0572S, 1MHz, 1V
NMT1272S, 1MHz, 1V
1000VDC test
MIN
1000
TYP
MAX
Units
VDC
Isolation Capacitance (C
ISOL
)
65
130
10
pF
Insulation Resistance
1
G
Conditions
All channels or any single channel
MIN
75
TYP
85
85
MAX
Units
%
kHz
Short-circuit duration
4
Lead temperature 1.5mm from case for 10 seconds
Input voltage V
IN
, NMT0572S
Input voltage V
IN
, NMT1272S
1 second
300°C
7V
15V
INPUT CHARACTERISTICS
ABSOLUTE MAXIMUM RATINGS
NMT SERIES
Triple Output 3W DC-DC Converters
www.dc-dc.com
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