NDT Datasheet, PDF (1/2 Pages) C&D Technologies – Isolated 3W Wide Input Dual Output DC-DC Converters

NDT SERIES
Isolated 3W Wide Input Dual Output DC-DC Converters
SELECTION GUIDE¹
FEATURES
s Industry Standard Footprint
s 1kVDC Isolation
s Dual Isolated Output
s Short Circuit Protection
s Low Profile 24 Pin Case
s Efficiency to 81%
s Power Density 0.90W/cm³
s 2:1 Wide Input Range
s 24V & 48V Input
s 12V & 15V Output
s Footprint 4.73cm²
s UL 94V-0 Package Materials
s Operating Temperature Range
–40°C to 85°C
s Load and Line Regulation
<1% on Both Outputs
s No Heatsink Required
s Internal SMD Construction
s Fully Encapsulated
s 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.
www.dc-dc.com
Nominal Rated
Input Output
Output Current
Voltage Voltage Min Load³ Full Load
Input
Current
Full Load
MTTF⁴
Order Code (V)
(V)
(mA)
(mA)
(mA)
(%) (pF) kHrs
NDTD2412
24
12
±31
±125
156
79 30 2075
NDTD2415
24
15
±25
±100
155
80 30 2080
NDTD4812
48
12
±31
±125
77
81 30 2090
NDTD4815
48
15
±25
±100
77
81 30 2045
INPUT CHARACTERISTICS¹
Parameter
Conditions
Voltage Range ^{24V input types}
48V input types
Reflected Ripple 24V input types with 10µF at input
Current
48V input types with 10µF at input
OUTPUT CHARACTERISTICS¹
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
Ripple
BW = 20Hz to 300kHz
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
% voltage change on negative output
when positive load varies from 12% to
50% with negative load fixed at 50%
MIN
18
36
MIN
TYP MAX Units
24
48
36
75
VDC
200 250 _{mA p-p}
125 150
TYP MAX Units
3
W
±1
±5
%
0.15 0.5
%
0.2 0.5
%
15
30 mV rms
90 150 mV p-p
2.1 3.0
%
ABSOLUTE MAXIMUM RATINGS
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
ISOLATION CHARACTERISTICS¹
Parameter
Isolation Test Voltage
Resistance
Conditions
Flash tested for 1 second
Viso=1KVDC
MIN TYP MAX Units
1000
VDC
1
GΩ
GENERAL CHARACTERISTICS¹
Parameter
Switching Frequency
Conditions
100% load V_IN nominal
25% load V_IN nominal
MIN TYP MAX Units
100 125 150 _kHz
410 500 590
ENVIRONMENTAL¹
Parameter
Conditions
Operation
Storage
Case Temperature Above Ambient 100% Load
MIN TYP MAX Units
– 40
85 °C
– 50
130 °C
28
°C
1 Specifications typical at T _A =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.