V29
1
︳
EC7B SERIES
20 WATT 2:1 INPUT RANGE
DC-DC CONVERTERS
FEATURES
* 20W Isolated Output
* Efficiency to 90%
* Fixed Switching Frequency
* 2:1 Input Range
* Regulated Outputs
* Continuous Short Circuit Protection
* Pi Input Filter
* CE Mark Meets 2004/108/EC
* UL60950-1 Approval
OUTPUT CURRENT INPUT CURRENT
MODEL
NUMBER
INPUT
VOLTAGE
OUTPUT
VOLTAGE
MIN. MAX. NO LOAD FULL LOAD
%
EFF.
CAPACITOR
LOAD MAX.
EC7B-12D12
9-18 VDC
±12 VDC 42 mA ±835 mA
40 mA 1856 mA 90 1000uF
EC7B-12D15
9-18 VDC
±15 VDC 33 mA ±670 mA
40 mA 1861 mA 90 800uF
EC7B-24S18
18-36 VDC
1.8 VDC 0 mA 6000 mA
30 mA 523 mA 86 6000uF
EC7B-24S25
18-36 VDC
2.5 VDC 0 mA 6000 mA
30 mA 710 mA 88 6000uF
EC7B-24S33
18-36 VDC
3.3 VDC 0 mA 5000 mA
40 mA 764 mA 90 5000uF
EC7B-24S05
18-36 VDC
5 VDC 0 mA 4000 mA
60 mA 926 mA 90 4000uF
EC7B-24S12
18-36 VDC
12 VDC 0 mA 1670 mA
20 mA 928 mA 90 2000uF
EC7B-24S15
18-36 VDC
15 VDC 0 mA 1330 mA
20 mA 924 mA 90 2000uF
EC7B-24D12
18-36 VDC
±12 VDC 42 mA ±835 mA
20 mA 928 mA 90 1000uF
EC7B-24D15
18-36 VDC
±15 VDC 33 mA ±670 mA
20 mA 930 mA 90 800uF
EC7B-48S18
36-75 VDC
1.8 VDC 0 mA 6000 mA
30 mA 262 mA 86 6000uF
EC7B-48S25
36-75 VDC
2.5 VDC 0 mA 6000 mA
30 mA 359 mA 87 6000uF
EC7B-48S33
36-75 VDC
3.3 VDC 0 mA 5000 mA
30 mA 386 mA 89 5000uF
EC7B-48S05
36-75 VDC
5 VDC 0 mA 4000 mA
40 mA 463 mA 90 4000uF
EC7B-48S12
36-75 VDC
12 VDC 0 mA 1670 mA
15 mA 469 mA 89 2000uF
EC7B-48S15
36-75 VDC
15 VDC 0 mA 1330 mA
15 mA 472 mA 88 2000uF
EC7B-48D12
36-75 VDC
±12 VDC 42 mA ±835 mA
10 mA 464 mA 90 1000uF
EC7B-48D15
36-75 VDC
±15 VDC 33 mA ±670 mA
10 mA 471 mA 89 800uF
NOTE: 1. Nominal Input Voltage 12, 24, 48VDC
V29
2
SPECIFICATIONS
All Specifications Typical At Nominal Line, Full Load, and 25 Unless Otherwise Noted℃
INPUT SPECIFICATIONS: GENERAL SPECIFICATIONS:
Input Voltage Range ....………………….....…. 12V .....................…… 9 - 18V
Efficiency .................................................................…..……... See Table
24V ……..…….…….. 18 - 36V
Isolation Voltage ............….. Input/Output .........……..…. 1500VDC max.
48V ……..…….….…. 36 - 75V
Isolation Resistance ............................…...............……. 10
8
ohm min.
Input Surge Voltage (100ms max.) …….…..… 12V ………............ 25Vdc max.
Isolation Capacitance …………………..……………….…… 1000pF typ.
24V ..................... 50Vdc max.
Switching Frequency .........................…….........………...... 350KHz typ.
48V ................... 100Vdc max.
EMI/RFI ……………………….……..…….. Six Sided Continuous Shield
Under Voltage Lockout ……….. 12Vin power up ……………..…..………. 8.8V
Operating Ambient Temperature ………………..…... -40 to +85℃ ℃
12Vin power down …….…...........……. 8.0V
De-rating, Above 71 ………………… Linearly to Zero power at 100℃ ℃
24Vin power up …………..…...………... 17V
Case Temperature (note6) ………………….……………….. 100 max.℃
24Vin power down …………............…. 16V
Cooling ………………………………………………… Natural Convection
48Vin power up ………….…………….. 34V
Storage Temperature ………………....….......……........ -55 to +125℃ ℃
48Vin power down ……..…..……....…. 33V
Humidity .................................................. 95% RH max. Non condensing
Positive Logic Remote ON/OFF (see note3&4)
MTBF …. MIL-STD-217F, GB, 25℃, Full Load …. Single … 900Khrs typ.
Input Filter ………………………………………………….……………… Pi Type
Dual ….. 740Khrs typ.
OUTPUT SPECIFICATIONS:
Dimensions ………........... 2.00x1.00x0.40 inches (50.8x25.4x10.2 mm)
Voltage Accuracy.....................................................………........… ±1.5% max.
Case Material ……..… Black Coated Copper with Non-Conductive Base
Voltage Balance (Dual) ……….………………………………….….±2.0% max.
Weight …………………………………………………………………... 35g
Transient Response: 75% - 100% Step Load Change
NOTE :
Error Band …….. ±5% Vout nominal, Recovery Time ….……….. <500us
1. Measured from high line to low line.
Ripple & Noise, 20MHz BW (Measured with 0.1uF MLCC) ……... 75mVpk-pk, max.
2. Measured from full load to 10% load.
Temperature Coefficient .……………………………………………. ±0.03%/°C
3. Logic compatibility …. CMOS or open collector TTL, ref. to -Vin
Line Regulation (note1) .…….……… Single. .......................…. ±0.2% max.
Module on …………..………………..… >5.5VDC or open circuit
Dual ………….….……….. ±0.5% max.
Module off ………………………….…………..…..……. <1.2VDC
Load Regulation (note2) …….……… Single/Dual …........…...... ±1.0% max.
4. Suffix "N" to the model number with negative logic remote on/off
Over Voltage Protection ……………………….………….. Zener or TVS Clamp
Module on ………………………………….…………... <1.2VDC
Output Short Circuit Protection .............................................….…. Continuous
Module off …………………………….. >5.5VDC or open circuit
External Trim Adj. Range ……….…… Single …………..……….…..…… ±10%
5. Suffix “S” to the model number with alternative pin configuration,
Start up time ……………………….… EC7B-24S12/15 ……...…... 13ms typ.
single output models only.
EC7B-48S12/15 …….….….. 22ms typ.
6. Maximum case temperature under any operating condition should
Other ……………….……...…. 5ms typ.
not be exceeded 100 .℃
Case B Dimensions:
1.0 0
[25.4]
0.10
[2.5]
1.800
[45.72]
2.00
[50.8]
0.800
[20.32]
2.00
[50.8]
BOTTOM
1.0 0
[25.4 ]
0.400
[10 .1 6]
5
0.22
[5.6]
0.04
[1.0]
0.400
[10.1 6]
3
4
VIEW
min
0.40
[10.2 ]
All Dimensions In Inches (mm)
Tolerances Inches: X.XX= ±.04 , X.XXX= ±.010
Millimeters: X.X= ±1.0 , X.XX= ±0.25
STANDARD PIN
CONFIGURATION
0.300
[7.62]
0.60
[15.2]
6
0.200
[5.08 ]
0.4 0
[10.2 ]
1
2
BOTTOM VIEW
0.22
[5.6]
0.04
1.0]
621
0.200
[5.08 ]
0.600
[15.2 4]
0.20
[5.1] 0.40
[10.2 ]
min
SUFFIX"S"PIN
0.1 0
[2.5]
35 4
CONFIGURATION
0.400
[10.16]
0.400
[10.16]
+V Input
-V Input
+V Output
-V Output
Single
Trim
PIN CONNECTION
2
5
6
4
3
1
Pin
Remote ON/OFF
Common
Dual
NOTE: Pin Size is 0.04±0.004 Inch (1.0±0.1 mm)DIA
+V Input
-V Input
+V Output
-V Output
EXTERNAL OUTPUT TRIM
10K Ohms
+Vout
TRIM
-Vout
+Vout
TRIM
-Vout
TRIMPOT
TRIM UP
TRIM DOWN
Typical Derating curve for Natural Convection
100
-40 71
0%
20%
40%
60%
80%
100%
120%
-40 -20 0 20 40 60 80 100
Ambient Temperature(
o
C)
LOAD(%)
Natural
Convection
