Features
Regulated
Converters
Description
•
•
•
•
•
•
•
•
6-Side Shielding
External ON/OFF control
1.6kVDC Isolation
UL/CSA/EN-60950-1 Certified
Wide 4:1 Input Voltage Range
Continuous Short Circuit Protection
Efficiency up to 91%
Fixed Switching Frequency
DC/DC Converter
REC20-Z
20 Watt
3
2“ x 1“
Single and Dual
Output
3Y
EAR
wa
The REC20-xxxxS_DZ -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
REC20-243.4SZ
REC20-245.1SZ
REC20-2412SZ
REC20-2415SZ
REC20-2405DZ
REC20-2412DZ
REC20-2415DZ
REC20-483.4SZ
REC20-485.1SZ
REC20-4812SZ
REC20-4815SZ
REC20-4805DZ
REC20-4812DZ
REC20-4815DZ
Input
Voltage Range
[VDC]
9-36
9-36
9-36
9-36
9-36
9-36
9-36
18-75
18-75
18-75
18-75
18-75
18-75
18-75
Output
Voltage
[VDC]
3.4
5.1
12
15
±5
±12
±15
3.4
5.1
12
15
±5
±12
±15
Output
Current
[mA]
5000
4000
1667
1333
±2000
±834
±667
5000
4000
1667
1333
±2000
±835
±667
Efficiency
typ.
[%]
88
90
89.5
90
87
89
89
88
90
89.5
90.5
87
90
91
max. Capacitive
Load
[µF]
13000
9600
1650
1050
±4800
±625
±525
13000
9600
1650
1050
±4800
±625
±525
E224736
IEC/EN60950-1 Certified
UL60950 Certified
CSA C22.2 NO. 60950 Certified
EN55022 Certified
Model Numbering
REC20-__ __ _Z
nom. Input Voltage
Output Voltage
Single
or
Dual
Ordering Examples:
REC20-4812SZ, Single Output, 18-75Vin (4:1) and 12Vout
REC20-2412DZ, Dual Output, 9-36Vin (4:1) and ±12Vout
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REV.: 3/2017
ECO-1
REC20-Z
DC/DC Converter
BASIC CHARACTERISTICS
Parameter
Input Voltage Range
Start/up Time
nom. Vin= 24V
Under Voltage Lockout (UVLO)
nom. Vin= 48V
Output Voltage Trimming
CTRL ON/OFF
Internal Operating Frequency
Minimum Load
Output Ripple and Noise
(1)
Notes:
Note1: Ripple and Noise is measured with a 20MHz bandwidth and a 0.1µF ceramic capacitor.
0%
100mVp-p
DC-DC ON
DC-DC OFF
DC-DC ON
DC-DC OFF
Series
Condition
nom. Vin= 24V
nom. Vin= 48V
Specifications
(measured @ ta= 25°C, nominal input voltage, full load and after warm up unless otherwise specified)
Min.
9VDC
18VDC
10ms
9VDC
7.5VDC
18VDC
16VDC
±10%
Open or 2.5V<Vr<12V
Short or 0V<Vr<1.2V
300kHz
Typ.
Max.
36VDC
75VDC
see calculation below
DC-DC ON
DC-DC OFF
Output Voltage Trimming
Trim UP
Trim DOWN
+Vout
R1
Vref
R3
R2
-Vout
Trim
Vref
R1
Trim
R3
R2
R
down
Vout
R1
R2
R3
Vref
3.4V
4.71 kΩ
Vref
2.7 kΩ
15 kΩ
1.24 V
R1
5.1V
12V
15V
R
up
2.3 kΩ 19.43 kΩ 25.6 kΩ
Trim
2.2 kΩ
R3
5.1 kΩ
9.1 kΩ
36 kΩ
R
R2
up
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
* 2.2kΩ =
1.839kΩ
continued on next page
ECO-2
REV.: 3/2017
www.recom-power.com
= nom. output voltage
= trim up resistor
= trim up factor
= trim down factor
DVout
= Vout - Vout
trimmed
R
up
=
q
a*R2
R2 - a
r
- R3 = kΩ
r
- R3 = kΩ
a=
q
b=
q
Vref
(Vout +
DVout)
- Vref
(Vout +
DVout)
- Vref
Vref
r
* R1 = kΩ
r
* R2 = kΩ
DVout
= output voltage trim
R
down
= trim down resistor
R
down
=
q
b*R1
R1 - b
r
* 2.3kΩ =
1.843kΩ
(5.1V + 0.51V) - 2.5V
2.5V
R
up
=
q
1.843kΩ * 2.2kΩ
2.2kΩ - 1.843kΩ
r
- 9.1kΩ =
2.255kΩ
R
down
=
q
1.839kΩ * 2.3kΩ
2.3kΩ - 1.839Ω
r
- 9.1kΩ =
0.080kΩ
REC20-Z
DC/DC Converter
Efficiency vs. Load
Series
REC20-4815SZ
100
95
90
Specifications
(measured @ ta= 25°C, nominal input voltage, full load and after warm up unless otherwise specified)
REC20-485.1SZ
100
95
90
Efficiency [%]
85
80
75
70
65
0
1
2
3
4
5
18V
24V
48V
75V
6
Efficiency [%]
85
80
75
70
65
0
1
2
3
4
5
18V
24V
48V
75V
6
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
0% to 100% load
25% to 100% load
25% load step change
single output
dual output
dual output
Condition
Type
Values
±1.0% max.
±0.2% max.
±0.5% max.
±1.0% max.
±5.0% max.
250µS typ.
Deviation vs. Load
REC20-485.1SZ
0.20
0.18
0.16
0.14
-0.10
-0.08
REC20-2415SZ
9V
18V
30V
36V
Deviation [%]
0.12
0.10
0.08
0.06
0.04
0.02
0
0
1
2
2
3
4
5
18V
36V
54V
75V
5
6
Deviation [%]
-0.12
-0.14
-0.16
-0.18
-0.20
0
0.13 0.27 0.40 0.54 0.67 0.80 0.94 1.07 1.21 1.34
Output Current [A]
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REV.: 3/2017
Output Current [A]
ECO-3
REC20-Z
DC/DC Converter
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
Specifications
(measured @ ta= 25°C, nominal input voltage, full load and after warm up unless otherwise specified)
Value
continuous, automatic recovery
4.5VDC typ.
7VDC typ.
16VDC typ.
20VDC typ.
180% typ.
1.6kVDC
1200pF 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 REC20-485.1SZ
non-condensing
natural convection (0.1m/s)
Condition
with derating (see graph)
Value
-40°C to +100°C
+105°C
0.02%/°C typ.
12°C/W
5000m
5% - 95% RH max.
MIL-STD-202G
1098 x 10³ hours
Derating Graph
@ nominal input voltage, full load and natural convection (0.1m/s)
REC20-485.1SZ
100
REC20-2415SZ
100
Output Power [%]
80
60
40
20
0
-40
Output Power [%]
80
60
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]
Ambient Temperature [°C]
85
Notes:
Note2: For more details, please contact our technical support service at techsupportAT@recom-power.com
ECO-4
REV.: 3/2017
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REC20-Z
DC/DC Converter
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
Specifications
(measured @ ta= 25°C, nominal input voltage, full load and after warm up unless otherwise specified)
EMC Compliance
EMI
ESD
Radiated Immunity
Fast Transient
Surge
(3)
Conducted Immunity
Power Magnetic Field
Condition
without external filter
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
EN55022, Class 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 B
C4
+Vin
+Vout
C1
-Vin
L1
C2
DC
DC
Com
-Vout
C3
MODEL
REC20-24xxS(D)Z
REC20-48xxS(D)Z
C1
4.7µF/50V
2.2µF/100V
C2
4.7µF/50V
2.2µF/100V
L1
C3
C4
1.5mH CMC 1000pF/2kV 1000pF/2kV
2.0mH CMC 1000pF/2kV 1000pF/2kV
DIMENSION and PHYSICAL CHARACTERISTICS
Parameter
Material
Package Dimension (LxWxH)
Package Weight
Type
Case
Base
PCB
Potting
Value
nickel plated copper
non conductive black plastic
FR4
silicone (UL94 V-0)
50.8 x 25.4 x 10.2mm
27g typ.
continued on next page
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REV.: 3/2017
ECO-5
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