ECLB60W 49.5-60 Watt Isolated DC-DC Converters
Application Note V12 November 2018
1
ISOLATED DC-DC CONVERTER
ECLB60W SERIES
APPLICATION NOTE
Approved By:
Department Approved By Checked By Written By
Astray/James
Research and Development
Department
Enoch
Jacky
Joyce
Quality Assurance
Department
Ryan Benny
ECLB60W 49.5-60 Watt Isolated DC-DC Converters
Application Note V12 November 2018
2
Content
1. INTRODUCTION 3
2. DC-DC CONVERTER FEATURES 3
3. ELECTRICAL BLOCK DIAGRAM 3
4. TECHNICAL SPECIFICATIONS 4
5. MAIN FEATURES AND FUNCTIONS 8
5.1 Operating Temperature Range 8
5.2 Remote On/Off 8
5.3 UVLO (Under Voltage Lock Out) 8
5.4 Over Current Protection 8
5.5 Over Voltage Protection 8
5.6 Over-Temperature Protection (OTP) 8
5.7 Output Voltage Adjustment 8
6. APPLICATIONS 8
6.1 Recommended Layout PCB Footprints and Soldering Information 8
6.2 Power De-Rating Curves for ECLB60W Series 9
6.3 LB Heat Sinks: 11
6.4 Efficiency vs. Load Curves 12
6.5 Input Capacitance at the Power Module 14
6.6 Test Set-Up 14
6.7 Output Voltage Adjustment 14
6.8 Output Ripple and Noise Measurement 15
6.9 Output Capacitance 15
7. SAFETY & EMC 16
7.1 Input Fusing and Safety Considerations. 16
7.2 EMC Considerations 16
8. PART NUMBER 20
9. MECHANICAL SPECIFICATIONS 20
ECLB60W 49.5-60 Watt Isolated DC-DC Converters
Application Note V12 November 2018
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1. Introduction
The ECLB60W series offer 60 watts of output power in
a 2.05x1.20x0.4 inches copper packages. The
ECLB60W series has a 4:1 wide input voltage range of
9-36 and 18-75VDC, and provides a precisely
regulated output. This series has features such as high
efficiency, 1500VDC of isolation and allows an ambient
operating temperature range of –40°C to 85°C
(de-rating above 45 °C). The modules are fully
protected against input UVLO (under voltage lock out),
output over-current, over-voltage and over-temperature
and short circuit conditions. Furthermore, the standard
control functions include remote on/off and adjustable
output voltage. All models are very suitable for
distributed power architectures, telecommunications,
battery operated equipment and industrial applications.
2. DC-DC Converter Features
* 60W Isolated Output
* Efficiency to 92%
* 2.05’’ X1.2” X0.4” Six-Sided Shield Metal Case
* 4:1 Input Range
* Regulated Outputs
* Fixed Switching Frequency
* Input Under Voltage Protection
* Over Current Protection
* Remote On/Off
* Continuous Short Circuit Protection
* No Tantalum Capacitor Inside
*
Safety Meets UL60950-1, EN60950-1, and IEC60950-1
*
Full Load Operation Up to 60 with Heat
℃
-Sink M-C655
Natural Convection
3. Electrical Block Diagram
Figure 1 Electrical Block Diagram for Single Output Modules
Figure 2 Electrical Block Diagram for Dual Output Modules
ECLB60W 49.5-60 Watt Isolated DC-DC Converters
Application Note V12 November 2018
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4. Technical Specifications
(All specifications are typical at nominal input, full load at 25 unless otherwise noted.)℃
ABSOLUTE MAXIMUM RATINGS
PARAMETER
NOTES and CONDITIONS
Device
Min. Typical
Max. Units
Input Voltage
24Vin -0.3 36
Continuous 48Vin -0.3 75 Vdc
24Vin 50
Transient 100ms 48Vin 100 Vdc
Operating Ambient Temperature
Derating, above 45℃ All -40 +85 ℃
Case Temperature All 105 ℃
Storage Temperature All -55 +125 ℃
Input/Output Isolation Voltage 1 minute All 1500 Vdc
INPUT CHARACTERISTICS
PARAMETER
NOTES and CONDITIONS
Device
Min. Typical
Max. Units
24Vin 9 24 36
Operating Input Voltage 48Vin 18 48 75 Vdc
Input UnderVoltage Lockout
24Vin 8 8.5 8.8
Turn-On Voltage Threshold 48Vin 16.5 17 17.5 V
dc
24Vin 7.7 8 8.3
Turn-Off Voltage Threshold 48Vin 15.5 16 16.5 V
dc
24Vin 0.5
Lockout Hysteresis Voltage 48Vin 1 V
dc
100% Load, Vin=9V 24Vin 7500
Maximum Input Current 100% Load, Vin=18V 48Vin 3800 mA
24S33 10
24S05 10
24S12 10
24S15 10
24D12 12
Vin=12V
24D15 12
48S33 8
48S05 8
48S12 8
48S15 8
48D12 8
No-Load Input Current
Vin=24V
48D15 8
mA
Inrush Current (I
2
t) As per ETS300 132-2 All 0.1 A
2
s
Input Reflected-Ripple Current P-P thru 1.2uH inductor, 5Hz to
20MHz All 30 mA
ECLB60W 49.5-60 Watt Isolated DC-DC Converters
Application Note V12 November 2018
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OUTPUT CHARACTERISTIC
PARAMETER
NOTES and CONDITIONS
Device
Min. Typical
Max. Units
Vo=3.3V
3.2505
3.3 3.3495
Vo=5V
4.925
5 5.075
Vo=12V
11.82
12 12.18
Vo=15V
14.775
15 15.225
Vo=±12V
11.82
12 12.18
Output Voltage Set Point Vin=nominal input, Io= Io
max.
Vo=±15V
14.775
15 15.225
Vdc
Output Voltage Balance Vin=nominal input, Io=Io
max.
Dual ±1.0 %
Output Voltage Regulation
Single ±0.5
Load Regulation Io=full load to min. Load Dual ±0.5 %
Single ±0.2
Line Regulation Vin=high line to low line, full Load Dual ±0.2 %
Cross Regulation Load cross variation 10%/100% Dual ±5 %
Temperature Coefficient Tc=-40 to ℃85℃ All ±0.02 %/℃
Output Voltage Ripple and Noise
5Hz to 20MHz bandwidth
Vo=3.3V
100
Vo=5V
100
Vo=12V
150
Vo=15V
150
Vo=±12V
150
Peak-to-Peak Full Load, Measured with 1uF MLCC
Vo=±15V
150
mV
Vo=3.3V
0 15000
Vo=5V
0 12000
Vo=12V
0 5000
Vo=15V
0 4000
Vo=±12V
0 ±2500
Operating Output Current Range
Vo=±15V
0 ±2000
mA
Output DC Current-Limit Inception
Vo=90% V
O, nominal
All 110 130 170 %
Vo=3.3V
15000
Vo=5V
12000
Vo=12V
5000
Vo=15V
4000
Vo=±12V
2500
Maximum Output Capacitance Full load (resistive)
Vo=±15V
2000
uF
DYNAMIC CHARACTERISTICS
PARAMETER
NOTES and CONDITIONS
Device
Min. Typical
Max. Units
Output Voltage Current Transient
Step Change in Output Current
All ±5 %
Setting Time (within 1% Vonominal)
75% to 100% of Io.max.
di/dt=0.1A/us All 250 us
Turn-On Delay and Rise Time
Turn-On Delay Time, From On/Off Control
Von/off to 10%Vo, set All 15 ms
Turn-On Delay Time, From Input
Vin, min. to 10%Vo, set All 15 ms
Output Voltage Rise Time 10%Vo, set to 90%Vo, set All 15 ms
ECLB60W 49.5-60 Watt Isolated DC-DC Converters
Application Note V12 November 2018
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EFFICIENCY
PARAMETER
NOTES and CONDITIONS
Device
Min. Typical
Max. Units
24S33 90.5
24S05 92
24S12 92.5
24S15 92
24D12 91
Vin=12V
24D15 92
48S33 91
48S05 92
48S12 92.5
48S15 92
48D12 91
100% Load
Vin=24V
48D15 92
%
24S33 90
24S05 92
24S12 92
24S15 91
24D12 91
Vin=24V
24D15 91
48S33 90.5
48S05 92
48S12 92
48S15 91
48D12 91
100% Load
Vin=48V
48D15 91
%
ISOLATION CHARACTERISTICS
PARAMETER
NOTES and CONDITIONS
Device
Min. Typical
Max. Units
Input to Output 1 minutes All 1500 Vdc
Isolation Resistance All 1000 MΩ
Input/Output 1500
Input/Case 1000
Isolation Capacitance
Output/Case
All
1000
pF
FEATURE CHARACTERISTICS
PARAMETER
NOTES and CONDITIONS
Device
Min. Typical
Max. Units
Single 245
Switching Frequency Dual 300 KHz
On/Off Control, Positive Remote On/Off logic
Logic Low (Module Off) Von/off at Ion/off=1.0mA All 0 1.2 V
Logic High (Module On) Von/off at Ion/off=0.1uA All
3.5 or
Open
Circuit
75 V
On/Off Control, Negative Remote On/Off logic
Logic Low (Module Off) Von/off at Ion/off=1.0mA All
3.5 or
Open
Circuit 0
75 V
Logic High (Module On) Von/off at Ion/off=0.1uA All 0 1.2 V
ECLB60W 49.5-60 Watt Isolated DC-DC Converters
Application Note V12 November 2018
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FEATURE CHARACTERISTICS
PARAMETER
NOTES and CONDITIONS
Device
Min. Typical
Max. Units
On/Off Current (for both remote on/off logic)
Ion/off at Von/off=0.0V All 0.3 1 mA
Leakage Current (for both remote on/off logic)
Logic high, Von/off=15V All 30 uA
Off Converter Input Current Shutdown input idle current All 4 10 mA
Output Voltage Trim Range Pout=maximum rated power All -10 +10 %
Vo=3.3V
3.9
Vo=5.0V
6.2
Vo=12V
15
Vo=15V
18
Vo=±12V
±15
Output Over Voltage Protection Zener or TVS clamp
Vo=±15V
±18
Vdc
Over-Temperature Shutdown
All 110 °C
GENERAL SPECIFICATIONS
PARAMETER
NOTES and CONDITIONS
Device
Min. Typical
Max. Units
Vo=3.3V
1116
Vo=5.0V
872
Vo=12V
930
Vo=15V
1230
Vo=±12V
859
MTBF Io=100%of Io.max.; Ta=25℃ per
MIL-HDBK-217F
Vo=±15V
1063
K
hours
Weight All 39
grams
ECLB60W 49.5-60 Watt Isolated DC-DC Converters
Application Note V12 November 2018
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5. Main Features and Functions
5.1 Operating Temperature Range
The ECLB60W series converters can be operated by a
wide ambient temperature range from -40 to ℃85℃
(de-rating above 45℃). The standard model has a
copper case and case temperature can not over 105℃
at normal operating.
5.2 Remote On/Off
The remote on/off input feature of the converter allows
external circuitry to turn the converter on or off.
Active-high remote on/off is available as standard. The
converter is turned on if the remote on/off pin is high
(>3.5Vdc to 75 or open circuit). Setting the pin low (0 to
<1.2Vdc) will turn the converter ‘off’. The signal level of
the remote on/off input is defined with respect to “-Vin”. If
not using the remote on/off pin, leave the pin open
(module will be on).
5.3 UVLO (Under Voltage Lock Out)
Input under voltage lockout is standard on the ECLB60W
unit. The unit will shut down when the input voltage
drops below a threshold, and the unit will operate when
the input voltage goes above the upper threshold.
5.4 Over Current Protection
All models have internal over current and continuous
short circuit protection. The unit operates normally once
the fault condition is removed. At the point of current limit
inception, the converter will go into hiccup mode
protection.
5.5 Over Voltage Protection
The over-voltage protection consists of a zener diode to
limiting the out voltage.
5.6 Over-Temperature Protection (OTP)
The ECLB60W series converters are equipped with
non-latching over-temperature protection. If the
temperature exceeds a threshold of 110°C (typical) the
converter will shut down, disabling the output. When the
temperature has decreased the converter will
automatically restart. The over-temperature condition
can be induced by a variety of reasons such as external
overload condition or a system fan failure.
5.7 Output Voltage Adjustment
Section 6.7 describes in detail how to trim the output
voltage with respect to its set point. The output voltage
on all models is adjustable within the range of +10%
to –10%. (Single output models only)
6. Applications
6.1 Recommended Layout PCB Footprints
and Soldering Information
The system designer or the end user must ensure that
other components and metal in the vicinity of the
converter meet the spacing requirements to which the
system is approved. Low resistance and low inductance
PCB layout traces are the norm and should be used
where possible. Due consideration must also be given to
proper low impedance tracks between power module,
input and output grounds. The recommended footprints
and soldering profiles are shown below.
Note: Dimensions are in inches (millimeters)
Le a d Fre e Wa ve S olde ring P rofile
0
50
100
150
200
250
300
0 5 0 1 0 0 1 5 0
Tim e (S e c onds )
Te mpe ra ture ( C )
Note：
1. Soldering Materials: Sn/Cu/Ni
2. Ramp up rate during preheat: 1.4 ℃/Sec (From 50℃
to 100℃)
3. Soaking temperature: 0.5 ℃/Sec (From 100℃ to
130℃), 60±20 seconds
4. Peak temperature: 260℃, above 250℃ 3~6 Seconds
5. Ramp up rate during cooling: -10.0 ℃/Sec (From
260℃ to 150℃)
ECLB60W 49.5-60 Watt Isolated DC-DC Converters
Application Note V12 November 2018
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6.2 Power De-Rating Curves for ECLB60W Series
Operating Ambient temperature Range: -40℃ ~ 85℃ (derating above 45 ).℃
Maximum case temperature under any operating condition should not exceed 105℃.
Typical Derating Curve for Natural Convection
105
-40 45
0%
20%
40%
60%
80%
100%
120%
-40 -20 0 20 40 60 80 100 120
Ambient Temperature(
o
C)
LOAD(%)
Natural
Convection
Example (without heatsink):
The ECLB60W-24S12 operating at nominal line voltage, an output current of 5A, and a maximum ambient temperature of 45℃.
Solution:
Given: Vin=24V
dc
, Vo=12V
dc
, Io=5A
Determine Power dissipation (P
d
):
P
d
=P
i
-P
o
=P
o
(1-η)/η
P
d
=5.0×10×(1-0.92)/0.92=5.22Watts
Determine airflow:
Airflow: Natural Convection
Check above Power de-rating curve:
Given: P
d
=5.22W and T
a
=45℃
Verifying: The maximum temperature rise △T = P
d
× R
ca
=5.22×11.25=58.73℃
The maximum case temperature T
c
=T
a
+△T=103.73℃ <105℃
Where: The R
ca
is thermal resistance from case to ambience.
The T
a
is ambient temperature and the T
c
is case temperature
Recommended PCB Layout with de-rating. (86x50x1.6mm, 2Oz.)
De-rating measured with nominal line. Output
power 60W and converter mounted test
board (86x50x1.6mm, 2Oz ).by M2.5 screw
ECLB60W 49.5-60 Watt Isolated DC-DC Converters
Application Note V12 November 2018
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Typical Derating Curve for Natural Convection with Heatsink
M-C655
105
-40 60
0%
20%
40%
60%
80%
100%
120%
-40 -20 0 20 40 60 80 100 120
Ambient Temperature(
o
C)
LOAD(%)
Natural
Convection
Example (with heatsink M-C655):
The ECLB60W-48S05 with thermal pad SZ 29.5x49.8x0.25mm and heat sink MC-655 operating at nominal line
voltage, an output current of 12A, and a maximum ambient temperature of 60℃.
Solution:
Given: Vin=48V
dc
, Vo=5V
dc
, Io=12A
Determine Power dissipation (P
d
):
P
d
=P
i
-P
o
=P
o
(1-η)/η
P
d
=5.0×10×(1-0.92)/0.92=5.22Watts
Determine airflow:
Airflow: Natural Convection
Check above Power de-rating curve:
Given: P
d
=5.22W and T
a
=60℃
Verifying: The maximum temperature rise △T = P
d
× R
ca
=5.22×8.3=43.33℃
The maximum case temperature T
c
=T
a
+△T=103.33℃ <105℃
Where: The R
ca
is thermal resistance from case to ambience.
The T
a
is ambient temperature and the T
c
is case temperature
Recommended PCB Layout with de-rating. (86x50x1.6mm, 2Oz.)
De-rating measured with nominal line.
Output power 60W and converter with
thermal pad SZ 29.5x49.8x0.25mm and
heat sink M-C655. Mounted test board
(86x50x1.6mm, 2Oz)by M2.5
screw
ECLB60W 49.5-60 Watt Isolated DC-DC Converters
Application Note V12 November 2018
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6.3 LB Heat Sinks:
20.70±0.2
36.5±0.2
30.50±0.2
7.22
50.8
4.90
22.4
8.1
21
9.5
2-R4.6
16-R0.65
16-1.30
15-3.30
2 Side 4-C0.2
3±0.3
0.3
12.7±0.3
2-2.7
+0.15
-0.10
M-C655 (G6620790202)
Transverse Heat Sink
All Dimensions in mm
Thermal Pad:
SZ29.5x49.8x0.25mm (G6135041753)
Screw:
M2.5x8mm (G75A3300922)
Washer:
(G75A5750052)
Heatsink : M-C655
Thermal Pad : SZ29.5x49.8x0.25mm
Screw : M2.5x8mm
Screw
Washer
Heatsink
Thermal Pad
6
2
1
Rca: 8.99°C/W (typ.), At natural convection
Rca: 8.3°C/W (typ.), At natural convection, mounted 85x50x1.6mm 2Oz test board.
Recommended PCB Layout with de-rating. (86x50x1.6mm, 2Oz.)
ECLB60W 49.5-60 Watt Isolated DC-DC Converters
Application Note V12 November 2018
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6.4 Efficiency vs. Load Curves
ECLB60W-24S33 (Eff Vs Io)
60%
70%
80%
90%
100%
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Current Load (%)
Efficiency (%)
9V
12V
24V
36V
ECLB60W-24S05 (Eff Vs Io)
60%
70%
80%
90%
100%
10% 20% 30% 40% 50% 60% 70% 8 0% 90% 100%
Current Load (%)
Efficiency (%)
9 V
1 2V
2 4V
3 6V
ECLB60W-24S12 (Eff Vs Io)
60%
70%
80%
90%
100%
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Current Load (%)
Efficiency (%)
9V
12V
24V
36V
ECLB60W-24S15 (Eff Vs Io)
60%
70%
80%
90%
100%
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Current Load (%)
Efficiency (%)
9V
12V
24V
36V
ECLB60W-24D12 (Eff Vs Io)
60%
70%
80%
90%
100%
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Current Load (%)
Efficiency (%)
9V
12V
24V
36V
ECLB60W-24D15 (Eff Vs Io)
60%
70%
80%
90%
100%
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Current Load (%)
Efficiency (%)
9V
12V
24V
36V
ECLB60W 49.5-60 Watt Isolated DC-DC Converters
Application Note V12 November 2018
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ECLB60W-48S33 (Eff Vs Io)
60%
70%
80%
90%
100%
10% 20 % 30% 40% 50% 60% 70% 80% 90% 100%
Current Load (%)
Efficiency (%)
18V
24V
48V
75V
ECLB60W-48S05 (Eff Vs Io)
60%
70%
80%
90%
100%
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Current Load (%)
Efficiency (%)
18V
24V
48V
75V
ECLB60W-48S12 (Eff Vs Io)
60%
70%
80%
90%
100%
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Current Load (%)
Efficiency (%)
18V
24V
48V
75V
ECLB60W-48S15 (Eff Vs Io)
60%
70%
80%
90%
100%
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Current Load (%)
Efficiency (%)
18V
24V
48V
75V
ECLB60W-48D12 (Eff Vs Io)
60%
70%
80%
90%
100%
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Current Load (%)
Efficiency (%)
18V
24V
48V
75V
ECLB60W-48D15 (Eff Vs Io)
60%
70%
80%
90%
100%
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Current Load (%)
Efficiency (%)
18V
24V
48V
75V
ECLB60W 49.5-60 Watt Isolated DC-DC Converters
Application Note V12 November 2018
14
6.5 Input Capacitance at the Power Module
The converters must be connected to low AC source
impedance. To avoid problems with loop stability
source inductance should be low. Also, the input
capacitors (Cin) should be placed close to the converter
input pins to de-couple distribution inductance.
However, the external input capacitors are chosen for
suitable ripple handling capability. Low ESR capacitors
are good choice. Circuit as shown in Figure 5
represents typical measurement methods for reflected
ripple current. C1 and L1 simulate a typical DC source
impedance. The input reflected-ripple current is
measured by current probe to oscilloscope with a
simulated.
source Inductance (L1).
C1 Cin
L1
To Oscilloscope
+Vin
-Vin
+Vo
-Vo
R-Load
Vin
+
-
L1: 1.2uH
C1: None
Cin: 330uF ESR<0.7ohm @100KHz
Figure 5 Input Reflected-Ripple Test Setup
6.6 Test Set-Up
The basic test set-up to measure parameters such as
efficiency and load regulation is shown in Figure 6.
When testing the modules under any transient
conditions please ensure that the transient response of
the source is sufficient to power the equipment under
test. We can calculate the
• Efficiency
• Load regulation and line regulation.
The value of efficiency is defined as:
%100×
×
×
=
ININ
OO
I
V
IV
η
Where
V
O
is output voltage,
I
O
is output current,
V
IN
is input voltage,
I
IN
is input current.
The value of load regulation is defined as:
%100. ×
−
=
NL
NLFL
V
VV
regLoad
Where
V
FL
is the output voltage at full load
V
NL
is the output voltage at zero load
The value of line regulation is defined as:
%100. ×
−
=
LL
LLHL
V
VV
regLine
Where
V
HL
is the output voltage of maximum input
voltage at full load.
V
LL
is the output voltage of minimum input
voltage at full load.
Figure 6 ECLB60W Series Test Setup
6.7 Output Voltage Adjustment
In order to trim the voltage up or down one needs to
connect the trim resistor either between the trim pin and
-Vo for trim-up and between trim pin and +Vo for
trim-down. The output voltage trim range is ±10%.
(Single output models only) This is shown in Figure 7
and 8:
+Vin
R trim-up
R-Load
Trim
+Vo
-Vin
-Vo
Figure 7 Trim-up Voltage Setup
ECLB60W 49.5-60 Watt Isolated DC-DC Converters
Application Note V12 November 2018
15
+Vin
-Vin -Vo
+Vo
R trim-down
R-Load
Trim
Figure 8 Trim-down Voltage Setup
1. The value of R
trim-up
defined as:
)(K )
2)(
)32(1
(
,
Ω−
×−
+
×
×
=
−
Rt
RVVo
RRRV
R
nomo
r
uptrim
Where
R
trim-up
is the external resistor in Kohm.
V
O, nom
is the nominal output voltage.
V
O
is the desired output voltage.
R1, Rt, R2, R3 and Vr are internal to the unit and
are defined in Table 1.
Table 1 – Trim up and Trim down Resistor Values
Model Number
Output
Voltage(V)
R1
(KΩ)
R2
(KΩ)
R3
(KΩ)
Rt
(KΩ)
Vr
(V)
ECLB60W-XXS33
3.3 2.74
1.8
0.27
9.1
1.24
ECLB60W-XXS05
5.0 2.32
2.32
0 8.2
2.5
ECLB60W-XXS12
12.0 6.8
2.4
2.32
22 2.5
ECLB60W-XXS15
15.0 8.06
2.4
3.9
27 2.5
For example, to trim-up the output voltage of 5.0V
module (ECLB60W-24S05) by 10% to 5.5V, R trim-up
is calculated as follows:
V
o
– V
o, nom
= 5.5 – 5.0 = 0.5V
R1 = 2.32
KΩ
R2 = 2.32
KΩ
R3 = 0
KΩ
Rt = 8.2
KΩ
,
Vr= 2.5 V
)4(K.32.8)
32
.
2
5
.
0
)032.2(32.25.2
(Ω=−
×
+
×
×
=
−uptrim
R
2.The value of R
trim-down
defined as:
)(K )1
2)(
1
(1
,
Ω−−
×−
×
×=
−
Rt
RVoV
RVr
RR
nomo
downtrim
Where
R
trim-down
is the external resistor in Kohm.
V
O, nom
is the nominal output voltage.
V
O
is the desired output voltage.
R1, Rt, R2, R3 and Vr are internal to the unit and
are defined in Table 1
For example, to trim-down the output voltage of 5.0V
module (ECLB60W-12S05) by 10% to 4.5V, R
trim-down is calculated as follows:
V
O,nom
– V
o
= 5.0 – 4.5 = 0.5V
R1 = 2.32 KΩ
R2 = 2.32 KΩ
R3 = 0 KΩ
Rt = 8.2 KΩ
Vr= 2.5 V
)(K 08.12.8)1
32
.
2
5
.
0
)32.25.2(
(32.2 Ω=−−
×
×
×=
−downtrim
R
6.8 Output Ripple and Noise Measurement
The test set-up for noise and ripple measurements is
shown in Figure 9. A coaxial cable was used to prevent
impedance mismatch reflections disturbing the noise
readings at higher frequencies. Measurements are
taken with output appropriately loaded and all
ripple/noise specifications are from 5Hz to 20MHz
bandwidth.
Note: C1: none
C2: 1uF ceramic capacitor
Figure 9 Output Voltage Ripple and Noise Measurement Set-Up
6.9 Output Capacitance
The ECLB60W series converters provide unconditional
stability with or without external capacitors. For good
transient response low ESR output capacitors should
be located close to the point of load. These series
converters are designed to work with load capacitance
to see technical specifications.
ECLB60W 49.5-60 Watt Isolated DC-DC Converters
Application Note V12 November 2018
16
7. Safety & EMC
7.1 Input Fusing and Safety Considerations.
The ECLB60W series converters have not an internal fuse. However, to achieve maximum safety and system
protection, always use an input line fuse. We recommended a time delay fuse 10A for 24Vin models and 6A for 48Vin
modules. Figure 10 circuit is recommended by a Transient Voltage Suppressor diode across the input terminal to
protect the unit against surge or spike voltage and input reverse voltage.
+Vin
-Vin
+Vo
-Vo
R-Load
Vin
+
-
FUSE
TVS
Figure 10 Input Protection
7.2 EMC Considerations
EMI Test Standard: EN55022 Class A Conducted Emission
Test Condition: Input Voltage: Nominal, Output Load: Full Load
Figure 11 Connection circuit for conducted EMI testing
ECLB60W 49.5-60 Watt Isolated DC-DC Converters
Application Note V12 November 2018
17
Model No. C1 C2 C3 C4 L1
ECLB60W-24S33
220u/63V ESR < 0.046Ω
220u/63V ESR < 0.046Ω
2200pF 1808
2200pF 1808
3.4uH
ECLB60W-24S05
220u/63V ESR < 0.046Ω
220u/63V ESR < 0.046Ω
2200pF 1808
2200pF 1808
3.4uH
ECLB60W-24S12
220u/63V ESR < 0.046Ω
220u/63V ESR < 0.046Ω
2200pF 1808
2200pF 1808
3.4uH
ECLB60W-24S15
220u/63V ESR < 0.046Ω
220u/63V ESR < 0.046Ω
2200pF 1808
2200pF 1808
3.4uH
ECLB60W-24D12
220u/63V ESR < 0.046Ω
220u/63V ESR < 0.046Ω
2200pF 1808
2200pF 1808
3.4uH
ECLB60W-24D15
220u/63V ESR < 0.046Ω
220u/63V ESR < 0.046Ω
2200pF 1808
2200pF 1808
3.4uH
ECLB60W-48S33
82u/100V ESR < 0.084Ω
82u/100V ESR < 0.084Ω
2200pF 1808
2200pF 1808
3.4uH
ECLB60W-48S05
82u/100V ESR < 0.084Ω
82u/100V ESR < 0.084Ω
2200pF 1808
2200pF 1808
3.4uH
ECLB60W-48S12
82u/100V ESR < 0.084Ω
82u/100V ESR < 0.084Ω
2200pF 1808
2200pF 1808
3.4uH
ECLB60W-48S15
82u/100V ESR < 0.084Ω
82u/100V ESR < 0.084Ω
2200pF 1808
2200pF 1808
3.4uH
ECLB60W-48D12
82u/100V ESR < 0.084Ω
82u/100V ESR < 0.084Ω
2200pF 1808
2200pF 1808
3.4uH
ECLB60W-48D15
82u/100V ESR < 0.084Ω
82u/100V ESR < 0.084Ω
2200pF 1808
2200pF 1808
3.4uH
ECLB60W 49.5-60 Watt Isolated DC-DC Converters
Application Note V12 November 2018
18
Figure 12 Conducted Class A of ECLB60W-24S33
Figure 13 Conducted Class A of ECLB60W-24S05
Figure 14 Conducted Class A of ECLB60W-24S12
Figure 15 Conducted Class A ECLB60W-24S15
Figure 16 Conducted Class A of ECLB60W-24D12
Figure 17 Conducted Class A of ECLB60W-24D15
ECLB60W 49.5-60 Watt Isolated DC-DC Converters
Application Note V12 November 2018
19
Figure 18 Conducted Class A of ECLB60W-48S33 Figure 19 Conducted Class A of ECLB60W-48S05
Figure 20 Conducted Class A of ECLB60W-48S12 Figure 21 Conducted Class A of ECLB60W-48S15
Figure 22 Conducted Class A of ECLB60W-48D12 Figure 23 Conducted Class A of ECLB60W-48D15
ECLB60W 49.5-60 Watt Isolated DC-DC Converters
Application Note V12 November 2018
20
8. Part Number
ECLB60W – XX X XX X X
9. Mechanical Specifications
BOTTOM VIEW
Mounting lnserts
M2.5*0.45 Through 2pl.
All Dimensions in Inches[mm]
Tolerance Inches:x.xx=±0.02 ,x.xxx=±0.010
Millimeters:x.x=±0.5 , x.xx=±0.25
0.04 6pl.
[1.0]
0.39
[10.0]
0.22 min
[5.6]
0.40
[10.2]
PIN CONNECTION
PIN
1
Single Output Dual Output
+V Input
-V Input
+V Output
-V Output
Trim
+V Input
-V Input
+V Output
-V Output
Common
Remote On/Off
2
3
4
5
6
1.43
[36.4]
1.800
[45.72]
2.05
[52.0]
0.350
[8.89]
0.400
[10.16]
0.200
[5.08]
0.81
[20.7]
1.20
[30.5]
0.052
[1.33]
0.400
[10.16]
0.400
[10.16]
NOTE: Pin Size is 0.04±0.004 Inch (1.0±0.1 mm)DIA
CINCON ELECTRONICS CO., LTD.
Headquarter Office:
14F, No.306, Sec.4, Hsin Yi Rd.,
Taipei, Taiwan
Tel: 886-2-27086210
Fax: 886-2-27029852
E-mail: sales@cincon.com.tw
Web Site: http://www.cincon.com
Factory:
No. 8-1, Fu Kong Rd.,
Fu Hsing Industrial Park
Fu Hsing Hsiang, ChangHua Hsien,
Taiwan
Tel: 886-4-7690261
Fax: 886-4-7698031
Cincon American Office:
1655 Mesa Verde Ave, Ste 180,
Ventura, CA 93003
Tel: 805-639-3350
Fax: 805-639-4101
E-mail: info@cincon.com
ECLB
60 Series
12：Nominal Input Voltage 12VDC
24：Nominal Input Voltage 24VDC
S：Single Output
D：Dual Output
33：Output Voltage 3.3 VDC
05：Output Voltage 5 VDC
12：Output Voltage 12 VDC
15：Output Voltage 15 VDC
None：Positive Logic
N ：Negative Logic
None: Mounting Insert M2.5*0.45 2pl.
-C: Clear Mounting Insert 2.65mm DIA.
