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參數(shù)資料
| 型號： | NDT4812 |
| 廠商： | C |
| 元件分類： | DC/DC變換器 |
| 英文描述： | Isolated 3W Wide Input Dual Output DC-DC Converters |
| 中文描述： | 隔離3W寬輸入雙輸出DC - DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 1/2頁 |
| 文件大?。?/td> | 157K |
| 代理商： | NDT4812 |
SELECTION GUIDE
1
FEATURES
I
Industry Standard Footprint
I
1kVDC Isolation
I
Dual Isolated Output
I
Short Circuit Protection
I
Low Profile 24 Pin Case
I
Efficiency to 81%
I
Power Density 0.90W/cm
3
I
2:1 Wide Input Range
I
24V & 48V Input
I
12V & 15V Output
I
Footprint 4.73cm
2
I
UL 94V-0 Package Materials
I
Operating Temperature Range
–40°C to 85°C
I
Load and Line Regulation
<1% on Both Outputs
I
No Heatsink Required
I
Internal SMD Construction
I
Fully Encapsulated
I
Custom Solutions Available
DESCRIPTION
The NDT series is a range of low profile DC-
DC converters offering dual outputs over a
2:1 input voltage range. All parts deliver 3W
output power up to 85°C without heatsinking.
A flyback oscillator design with isolated
feedback is used to give regulation over the
full operating range of 25% to 100% of full
load. It is strongly recommended that external
capacitors be used on input and output to
guarantee performance over full load and
input voltage range (see application notes for
guidance). The plastic case is rated to UL
94V-0 and encapsulant to UL 94V-1and the
connection pins are formed from a tin plated
alloy 42 leadframe.
Nominal
Input
Voltage Voltage
(V)
24
24
48
48
Rated
Output
Input
Current
Full Load
(mA)
156
155
77
77
Output Current
Min Load
3
(mA)
±31
±25
±31
±25
Full Load
(mA)
±125
±100
±125
±100
MTTF
4
kHrs
2075
2080
2090
2045
Order Code
NDTD2412
NDTD2415
NDTD4812
NDTD4815
(V)
12
15
12
15
(%)
79
80
81
81
(pF)
30
30
30
30
Parameter
Conditions
24V input types
48V input types
MIN
18
36
TYP
24
48
200
125
MAX
36
75
250
150
Units
Voltage Range
VDC
Reflected Ripple 24V input types with 10μF at input
Current
48V input types with 10μF at input
mA p-p
Short circuit protection over temperature range and input voltage range
Input Voltage, 24V types
Input Voltage, 48V types
Lead temperature 1.5mm from case for 10 seconds
Minimum Load
continuous
40V
80V
300°C
25% of rated output
INPUT CHARACTERISTICS
1
OUTPUT CHARACTERISTICS
1
Parameter
Conditions
Rated Power
Voltage Set
With external input/output capacitors,
Point Accuracy
refer to recommended test circuit
Low line to high line,
Line Regulation
with external input/output capacitors,
refer to recommended test circuit
25% load to 100% load,
Load Regulation with external input/output capacitors,
refer to recommended test circuit
BW = 20Hz to 300kHz
Ripple
With external input/output capacitors,
refer to recommended test circuit
BW = DC to 20MHz
Ripple & Noise
With external input/output capacitors,
refer to recommended test circuit
Cross
Regulation
50% with negative load fixed at 50%
ABSOLUTE MAXIMUM RATINGS
1 Specifications typical at T
=25°C, nominal input voltage and rated output current unless otherwise specified.
2 Measured at full load with external input/output capacitors, refer to test circuit.
3 A lower load is entirely safe but higher levels of output ripple will be experienced.
4 Calculated using MIL-HDBK-217F with nominal input voltage at full load.
NDT SERIES
Isolated 3W Wide Input Dual Output DC-DC Converters
www.dc-dc.com
ISOLATION CHARACTERISTICS
1
Parameter
Isolation Test Voltage
Resistance
GENERAL CHARACTERISTICS
1
Parameter
ENVIRONMENTAL
1
Parameter
Operation
Storage
Case Temperature Above Ambient 100% Load
Conditions
Flash tested for 1 second
Viso=1KVDC
MIN
1000
1
TYP
MAX
Units
VDC
G
Conditions
100% load V
IN
nominal
25% load V
IN
nominal
MIN
100
410
TYP
125
500
MAX
150
590
Units
Switching Frequency
kHz
Conditions
MIN
–40
–50
TYP
MAX
85
130
Units
°C
°C
°C
28
MIN
TYP
MAX
3
Units
W
±1
±5
%
0.15
0.5
%
0.2
0.5
%
15
30
mV rms
90
150
mV p-p
% voltage change on negative output
2.1
3.0
%
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