S T A N D A R D D C / D C C O N V E R T E R S
68
Input Characteristics
Input Voltage Range:
9-18, 36-75 VDC
Input Under Voltage Shutdown
8V (9-18), 33V (36-75) VDC
Input Filtering:
Pi filter
Efficiency:
See Available Models Chart
No Load Input Current:
25mA typical
Output Characteristics
Output Voltage Accuracy:
+/-1%
Output Voltage Adjustment:
V1 Fixed, V2 adjustable +10% and -30% of nominal
Total Error Band:
+/-2% Max.
Minimum Load Requirements:
None
Line Regulation:
+/-0.5% Low Line - High Line
Load Regulation:
+/-0.5% Min Load - Full Load
Ripple and Noise:
50mV or 1% pk-pk, 20MHz Bandwidth
Transient Response/Recovery Time:
200uS Typ., 25% Load Step
Temperature Coefficient:
+/-0.02% / C
Short Circuit Protection:
Continuous (Hiccup Mode)
Over Voltage Protection:
Standard
Environmental Characteristics
Operating Temperature Range (Ambient):
-40C to +85C, See 2700HN Series Data
Sheet for Derating curves.
Storage Temperature Range:
-55C to +125C
Maximum Case Temperature:
105C Baseplate
Thermal Shutdown:
115C Baseplate
Humidity:
Up to 95%, Non-condensing
Vibration
5Grms, 5Hz to 2KHz
Reliability (MTBF per Mil-HDBK-217):
>800,000 hours, +25C, Ground Benign
General Characteristics
Switching Frequency:
400KHz, Fixed
Isolation (Input to Output):
1500VDC minimum (1 minute)
Isolation Capacitance:
1200pF
Weight:
1.2oz (34g)
Case Material:
Aluminum baseplate with black anodized
aluminum case
Agency Approvals
UL, CSA, TUV and CE (LVD, 48 Vin Models)
Key Features:
Dual, independantly
controlled output
channels
Unencapsulated
construction
Industry Standard 2.0"
x 2.0" x .40" Footprint
Switching frequencies
synchronized at 400kHz
Ideally Suited For:
Mixed analog/digital
subsystems
Telecom equipment
Distributed power
networks
2700HN series
27 watts
All specifications are typical at 25 degrees C with nominal input voltage and full output unless
otherwise noted. Specifications are subject to change without notice. All dimensions are typical.
69
Available Models
Input
Nominal
Voltage
Output
Max. Output
Model
Input Voltage
Range
Voltage
Current
Efficiency @
(VDC)
(VDC)
(VDC)
(A)
Full-Load (%)
2705/3P12HN
12
9-18
+5.0 / +3.3
2.5 / 4.0
79
2703/2P12HN
12
9-18
+3.3 / +2.5
2.5 / 4.0
78
2705/3P48HN
48
36-75
+5.0 / +3.5
3.0 / 5.0
82
2703/2P48HN
48
36-75
+3.3 / +2.5
3.0 / 5.0
80
2705/3N12HN
12
9-18
+5.0 / -3.3
2.5 / 4.0
79
2703/2N12HN
12
9-18
+3.3 / -2.5
2.5 / 4.0
78
2705/3N48HN
48
36-75
+5.0 / -3.3
3.0 / 5.0
82
2703/2N48HN
48
36-75
+3.3 / -2.5
3.0 / 5.0
80
*Total output power not to exceed 27W (22W for 12Vin models.)
Outline Drawing
Pinout Chart
Pin
Function
1
Remote On/Off
2
No Pin
3
- Input
4
+ Input
5
Trim
6
V2 Output
7
Common
8
V1 Output
0.60
15.24
2.00 SQUARE
50.80
1.80
45.72
0.50
12.70
0.40
10.16
0.30
7.62
1.10
27.94
.70
17.78
0.10
2.54
0.64
16.26
0.02 TYP
0.51
0.40
10.20
0.13
3.18
HEATSINK IS OPTIONAL
0.10
2.50
PIN DIA 0.04 (1.02) (TYP 7 PLCS
4
8
3
7
1
6
5
VENT SLOTS ARE TYPE FOR
TWO LONG SIDES ONLY.
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