Features
Regulated
Converters
Description
•
•
•
•
•
•
•
•
6-Side Shielding
External ON/OFF control
1.6kVDC Isolation
UL/CSA/EN-60950-1 Certified
2:1 Input Voltage Range
Continuous Short Circuit Protection
Efficiency up to 90.5%
Fixed Switching Frequency
DC/DC Converter
REC20
20 Watt
3
2“ x 1“
Single and Dual
Output
3Y
EAR
wa
The REC20-xxxxS_D-series offer single and dual regulated outputs in a 2”x1” package with 1.6kVDC
isolation and are suitable for higher power industrial applications. Remote on/off control is standard.
The higher current outputs have raised output voltages to compensate for track losses as standard. The
converter is fully certified to UL/EN/IEC safety standards.
rranty
Selection Guide
Part
Number
REC20-123.4S
REC20-125.1S
REC20-1212S
REC20-1215S
REC20-1212D
REC20-1215D
REC20-243.4S
REC20-245.1S
REC20-2412S
REC20-2415S
REC20-2412D
REC20-2415D
REC20-483.4S
REC20-485.1S
REC20-4812S
REC20-4815S
REC20-4812D
REC20-4815D
Input
Voltage Range
[VDC]
9-18
9-18
9-18
9-18
9-18
9-18
18-36
18-36
18-36
18-36
18-36
18-36
36-75
36-75
36-75
36-75
36-75
36-75
Output
Voltage
[VDC]
3.4
5.1
12
15
±12
±15
3.4
5.1
12
15
±12
±15
3.4
5.1
12
15
±12
±15
Output
Current
[mA]
5000
4000
1670
1340
±835
±670
5000
4000
1670
1340
±835
±670
5000
4000
1670
1340
±835
±670
Efficiency
typ.
[%]
85
89
88.5
88.5
89
89
86
90
89
90
89.5
89.5
86.5
89
89
90
89.5
90.5
max. Capacitive
Load
[µF]
10000
6800
1800
1000
±800
±500
10000
6800
1800
1000
±800
±500
10000
6800
1800
1000
±800
±500
E224736
IEC/EN60950-1 Certified
UL60950-1 Certified
CSA C22.2 NO. 60950 Certified
EN55022 Certified
Model Numbering
REC20-__ __ _
nom. Input Voltage
Output Voltage
Ordering Examples:
REC20-4812S, Single Output, 36-75Vin and 12Vout
REC20-2412D, Dual Output, 18-36Vin and ±12Vout
Single
or
Dual
www.recom-power.com
REV.: 3/2017
ECO-1
REC20
DC/DC Converter
Specifications
(measured @ ta= 25°C, nominal input voltage, full load and after warm up unless otherwise specified)
BASIC CHARACTERISTICS
Parameter
Input Voltage Range
Start/up Time
nom. Vin= 12V
Under Voltage Lockout (UVLO)
nom. Vin= 24V
nom. Vin= 48V
Output Voltage Trimming
CTRL ON/OFF
Internal Operating Frequency
Minimum Load
Output Ripple and Noise
(1)
0%
100mVp-p
Notes:
Note1: Ripple and Noise is measured with a 20MHz bandwidth and a 0.1µF ceramic capacitor.
DC-DC ON
DC-DC OFF
DC-DC ON
DC-DC OFF
DC-DC ON
DC-DC OFF
Series
Condition
nom. Vin= 12V
nom. Vin= 24V
nom. Vin= 48V
Min.
9VDC
18VDC
36VDC
Typ.
Max.
18VDC
36VDC
75VDC
10ms
8.6VDC
7.8VDC
17.6VDC
16.8VDC
34.6VDC
33.8VDC
±10%
Open or 3V<Vr<12V
Short or 0V<Vr<1.2V
350kHz
see calculation below
DC-DC ON
DC-DC OFF
Output Voltage Trimming
Trim UP
R1
Vref
R3
R2
Trim DOWN
+Vout
R1
Trim
Vref
R
down
Trim
R3
Vout
R1
R2
R3
Vref
3.4V
2.1 kΩ
Vref
1.2 kΩ
4.7 kΩ
1.24 V
R1
5.1V
12V
15V
6.04 kΩ
1.2 kΩ
9.76 kΩ
R
up
R
up
-Vout
R2
2.21 kΩ 8.87 kΩ
Trim
2.1 kΩ
R3
2.4 kΩ
7.32 kΩ 15.0 kΩ
R2
2.5 V
-Vout
Trim Calculation
Vout
R
up
a
b
Trim Up:
Vout = 5.1V,
DVout
= 0.51V (10%), Vref= 2.5V
a=
q
Trim down:
Vout = 5.1V,
DVout
= -0.51V (-10%), Vref= 2.5V
b=
q
[5.1V + (-0.51V)] - 2.5V
2.5V
r
* 2.1kΩ =
1.756kΩ
R
down
=
q
1.756kΩ * 2.21kΩ
2.21kΩ - 1.756Ω
r
- 7.32kΩ =
1.219kΩ
2.5V
(5.1V + 0.51V) - 2.5V
r
* 2.21kΩ =
1.771kΩ
R
up
=
q
1.771kΩ * 2.1kΩ
2.1kΩ - 1.771kΩ
r
- 7.32 =
3.977kΩ
= nom. output voltage
= trim up resistor
= trim up factor
= trim down factor
R
down
=
q
b*R1
R1 - b
r
- R3 = kΩ
b=
q
(Vout +
DVout)
- Vref
Vref
r
* R2 = kΩ
DVout
= Vout - Vout
trimmed
R
up
=
q
a*R2
R2 - a
r
- R3 = kΩ
a=
q
Vref
(Vout +
DVout)
- Vref
r
* R1 = kΩ
DVout
= output voltage trim
R
down
= trim down resistor
continued on next page
ECO-2
REV.: 3/2017
www.recom-power.com
REC20
DC/DC Converter
Specifications
(measured @ ta= 25°C, nominal input voltage, full load and after warm up unless otherwise specified)
Efficiency vs. Load
Series
REC20-2415S
95
90
REC20-485.1S
95
90
85
Efficiency [%]
80
75
70
65
60
55
0
0.5
1
1.5
2
2.5
3
36V
54V
75V
3.5
6
Efficiency [%]
85
80
75
70
18V
24V
36V
0
0.13 0.27 0.40 0.54 0.67 0.80 0.94 1.07 1.21 1.34
Output Current [A]
Output Current [A]
REGULATIONS
Parameter
Output Accuracy
Line Regulation
Load Regulation
Cross Regulation
Transient Response Recovery Time
low line to high line, full load
10% to 100% load
25% to 100% load
25% load step change
dual output
Condition
Type
Values
±1.0% typ. / ±1.5% max.
±0.2% max.
±0.5% max.
±5.0% max.
250µS typ.
Deviation vs. Load
REC20-485.1S
0.70
0.60
0.50
36V
48V
75V
0.40
0.35
0.30
REC20-2415S
18V
24V
36V
Deviation [%]
Deviation [%]
0
0.40
0.30
0.20
0.10
0
1
2
2
3
4
5
5
6
0.25
0.20
0.15
0.10
0.05
0
0
0.13 0.27 0.40 0.54 0.67 0.80 0.94 1.07 1.21 1.34
Output Current [A]
www.recom-power.com
REV.: 3/2017
Output Current [A]
ECO-3
REC20
DC/DC Converter
Specifications
(measured @ ta= 25°C, nominal input voltage, full load and after warm up unless otherwise specified)
PROTECTIONS
Parameter
Short Circuit Protection (SCP)
Over Voltage Protection (OVP)
Over Load Protection (OLP)
Isolation Voltage
Isolation Capacitance
Isolation Resistance
I/P to O/P
tested for 1 minute
Series
Condition
below 100mΩ
Zerner Diode Clamp
3.4Vout
5.1Vout
12Vout
15Vout
Value
continuous, automatic recovery
3.9VDC typ.
6.2VDC typ.
15VDC typ.
18VDC typ.
140% typ.
1.6kVDC
1000pF typ.
1GΩ min.
ENVIRONMENTAL
Parameter
Operating Temperature Range
Maximum Case Temperature
Temperatur Coefficient
Thermal Impedance
Operating Altitude
Operating Humidity
Vibration
MTBF
according to MIL-HDBK-217F G.B., +25°C, referring to REC20-125.1S
non-condensing
natural convection (0.1m/s)
Condition
with derating (see graph)
Value
-40°C to +100°C
+100°C
0.05%/°C typ.
12°C/W
5000m
5% - 95% RH max.
MIL-STD-202G
607 x 10³ hours
Derating Graph
@ nominal input voltage, full load and natural convection (0.1m/s)
REC20-485.1S
REC20-2415S
100
100
Output Power [%]
80
60
40
20
0
-40
Output Power [%]
80
60
50
40
20
0
-40
Safe Operating Area
-20
0
20
40
60
80
100
120
Safe Operating Area
-20
0
20
40
60
80
100
120
Ambient Temperature [°C]
75 85 95
Ambient Temperature [°C]
75
90
Notes:
Note2: For more details, please contact our technical support service at TechsupportAT@recom-power.com
ECO-4
REV.: 3/2017
www.recom-power.com
REC20
DC/DC Converter
Specifications
(measured @ ta= 25°C, nominal input voltage, full load and after warm up unless otherwise specified)
SAFETY AND CERTIFICATIONS
Certificate Type
CB General Safety
UL General Safety
EN General Safety
CAN/CSA General Safety
E224736
Series
Report / File Number
Standard
IEC60950-1, 2nd Edition, 2013
UL60950-1, 2nd Edition, 2014
EN60950-1, 2nd Edition, 2013
C22.2 No. 60950-1-07, 2014
EMC Compliance
EMI
ESD
Radiated Immunity
Fast Transient
Surge
(3)
Conducted Immunity
Power Magnetic Field
Condition
with external filter (see filter suggestions)
Air: ±8kV; Contact: ±4kV
10V/m
±1kV
±1kV
10Vr.m.s
50Hz 1A/m (r.m.s)
Standard / Criterion
EN55022, Class A,B
EN61000-4-2, Criteria B
EN61000-4-3, Criteria A
EN61000-4-4, Criteria B
EN61000-4-5, Criteria A
EN61000-4-6, Criteria A
EN61000-4-8, Criteria A
Notes:
Note3: An external MOV is required if the module has to meet EN61000-4-5. The MOV suggest: NichTek SVI32-380
EMC Filtering - Suggestions for Class A
+Vin
+Vout
C1
-Vin
MODEL
C2
L1
Com
-Vout
C1
4.7µF/50V
4.7µF/50V
2.2µF/100V
C2
NA
NA
2.2µF/100V
L1
0.45mH CMC
0.45mH CMC
0.45mH CMC
REC20-12xxS(D)
REC20-24xxS(D)
REC20-48xxS(D)
EMC Filtering - Suggestions for Class B
C4
+Vout
+Vin
C1
-Vin
L1
C2
DC
DC
Com
-Vout
C3
MODEL
REC20-12xxS(D)
REC20-24xxS(D)
REC20-48xxS(D)
C1
10µF/50V
4.7µF/50V
2.2µF/100V
C2
10µF/50V
NA
4.7µF/100V
L1
0.45mH CMC
0.45mH CMC
0.67mH CMC
C3
1nF/2kV
1nF/2kV
3.3nF/2kV
C4
1nF/2kV
1nF/2kV
3.3nF/2kV
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REV.: 3/2017
ECO-5
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