DELTA S24SE05004

S24SE/S24DE series
20W Single/Dual Output DC/DC Converter
FEATURES

Efficiency up to 88%

Wide input range, 9V-36V

Package with Industry Standard Pinout

Package Dimension:
25.4 x25.4 x10.2mm (1.0” x1.0” x0.40”)(No HSK)
31.0 x25.4 x17.5mm (1.22” x1.00” x0.69”)(HSK)

Over voltage protection, hiccup mode

Over current protection, hiccup mode

Positive or Negative Remote ON/OFF

Without tantalum capacitor inside module

Operating Temperature range - 40°C to +85°C

Input to Output Isolation: 1600VDC

RoHs Compliant

3 Years Product Warranty

Heat-sink is option

UL60950, 2ND Edition, 2011-12-19 Recognized
The S24SE/S24DE series is miniature, isolated 20W DC/DC converters with 1600VDC isolation. The S24SE/S24DE family comes with a
host of industry-standard features, such as over current protection, over voltage protection, over temperature protection and remote on/off.
An optional heatsink is available for more extreme thermal requirements. All models have an untra-wide 4:1 input voltage range (9V to 36V).
With operating temperature of -40°C to +85°C, it is suitable for customers’ critical applications, such as process control and automation,
transportation, data communication and telecom equipment, test equipment, medical device and everywhere where space on the PCB is
critical.
Model List
Model
Number
S24SE3R306
S24SE05004
S24SE12002
S24SE15001
S24DE120R8
S24DE150R6
Input
Voltage
(Range)
Output
Voltage
VDC
24
(9 ~ 36)
Output Current
Input Current
(typ input voltage)
Load
Regulation
Maxcapacitive
Load
@Max. Load @No Load
Efficiency
(typ.)
Max.
Min.
@Max. Load
VDC
mA
mA
mA(typ.)
mA(typ.)
mV
uF
%
3.3V
5.0V
12V
15V
±12V
±15V
6000
4000
1670
1330
830
670
0
0
0
0
0
0
960
960
960
960
960
960
55
55
20
20
25
25
±10
±10
±12
±15
±120
±150
10000
10000
1000
1000
±1000
±680
87%
88%
88%
88%
88%
88%
Input Characteristics
Item
Input Surge Voltage (100 msec)
Input Turn-On Voltage Threshold
Input Turn-Off Voltage Threshold
Input Under-Voltage Lockout Hysteresis
Off-Converter Input Current
Input reflected ripple current
Reverse Polarity Input Current
ON/OFF Control, Logic High
ON/OFF Control, Logic Low
Input Filter
DS_S24SE/S24DE 20W _10172013
Model
All Models
All Models
All Models
All Models
All Models
All Models,with 12uH, 20MHz
All Models
All Models
All Models
All Models
Min.
Typ.
8
7
0.4
8.5
7.5
1
6
5
---
--2.4
-0.7
Max.
50
9
8
1.7
20
0.3
10
0.8
Internal PI Filter
Unit
VDC
VDC
VDC
VDC
mA
mA
A
VDC
VDC
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P1
S24SE/S24DE series
20W Single/Dual Output DC/DC Converter
Output Characteristics
Item
Output Voltage Accuracy
Output Voltage Balance
Conditions
Min.
-----
Dual Output, Balanced Loads
Single output
Dual output
Dual output,Asymmetrical Load
25%-100% Full Load
Over Load, Line and Temperature
12V, 15V, ±12V, ±15V
3.3V, 5.0V
50%-75% full load, 0.1A/uS
Output Voltage 10% Low, Hiccup
Long Term, Auto-recovery
Hiccup, Auto-recovery
Single Output
Line Regulation
Cross Regulation
Total Outupt Voltage Range
Ripple & Noise
Ripple & Noise
Dynamic load response
Output Over Current Protection
Short Output Protection
Output Over-Voltage Protection
Output Trim Range
-----
Typ.
±1.0
±1.0
±0.1
±0.1
Max.
±2.0
±2.0
±0.2
±0.5
Unit
%Vo
%Vo
%Vo
%Vo
±2
±3
%Vo
--50
50
3
±3
-----
110
160
%Vo
mV P-P
mV P-P
%Vo
%Iomax
115
-10
150
+10
%Vo
%Vo
General Characteristics
Item
Conditions
Min.
Typ.
Max.
Unit
I/O Isolation Voltage (rated)
---
---
1600
VDC
I/O Isolation Resistance
10
---
---
MΩ
I/O Isolation Capacitance
1100
pF
Switching Frequency
550
KHz
Environmental Specifications
Parameter
Conditions
Min.
Max.
Unit
Ambient
-40
+85
℃
Case Temperature
---
+105
℃
Storage Temperature Range
-50
+125
℃
Humidity (non condensing)
---
95
% rel. H
Cooling
Free-Air convection
Operating Temperature Range (with Derating)
Power Derating Curves (No Heat Sink and With Heat Sink)
110%
Output Power(%)
S24SE&S24DE_20W Series (Encapsulation) Output Power vs. Ambient Temperature
at Natural Convection
110%
100%
100%
90%
90%
80%
80%
70%
Output Power(%)
S24SE &S24DE_20W Series (Encapsulation) Output Power vs. Ambient Temperature
at Natural Convection (with Heat Sink)
70%
Natural
Convection
60%
60%
50%
50%
40%
40%
30%
30%
20%
20%
10%
10%
0%
Natural
Convection
0%
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
100
110
120
Ambient Temperature (℃)
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
100
110
120
Ambient Temperature (℃)
Notes
1
2
‫‏‬3
4
Specifications typical at Ta=+25℃, resistive load, nominal input voltage and rated output current unless otherwise noted.
Ripple & Noise measurement bandwidth is 0-20MHz, with 10µF, tantalum capacitor and 1µF ceramic capacitor.
All DC/DC converters should be externally fused at the front end for protection.
Specifications are subject to change without notice.
DS_S24SE/S24DE 20W _10172013
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P2
S24SE/S24DE series
20W Single/Dual Output DC/DC Converter
ELECTRICAL CHARACTERISTICS CURVES - S24SE05004, 9-36VIN, 5.0V/4A
3.5
90
87
POWER DISSIPATION(W)
EFFICIENCY(%)
84
81
36Vin
78
24Vin
75
72
9Vin
69
3.0
36Vin
2.5
2.0
24Vin
9Vin
1.5
66
1.0
63
60
0.5
0.5
1
1.5
2
2.5
3
3.5
4
OUTPUT CURRENT(A)
0.5
1
1.5
2
2.5
3
3.5
4
OUTPUT CURRENT(A)
Efficiency vs. load current for various input voltage at 25°C.
Full load input characteristics at room temperature.
Turn-on transient at full load current (10ms/div).
Top Trace: Vout; 2V/div; Bottom Trace: ON/OFF input: 5V/div.
Turn-on transient at full load current (10 ms/div).
Top Trace: Vout; 2V/div; Bottom Trace: input voltage: 8V/div.
Output voltage ripple at nominal input voltage and max load
current (20 mV/div, 2us/div)
Load cap: 10µF, tantalum capacitor and 1µF ceramic capacitor.
Bandwidth: 20 MHz.
DS_S24SE/S24DE 20W _10172013
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P3
S24SE/S24DE series
20W Single/Dual Output DC/DC Converter
ELECTRICAL CHARACTERISTICS CURVES - S24SE12002, 9-36VIN, 12V/1.67A
3.5
88
3.1
POWER DISSIPATION(W)
90
EFFICIENCY(%)
86
84
36Vin
24Vin
82
9Vin
80
36Vin
2.7
24Vin
2.3
1.9
9Vin
1.5
78
1.1
76
0.7
74
0.3
0.5
0.7
0.9
1.1
1.3
OUTPUT CURRENT(A)
1.5
1.7
0.3
0.5
0.7
0.9
1.1
1.3
1.5
1.7
OUTPUT CURRENT(A)
Efficiency vs. load current for various input voltage at 25°C.
Power diddipation vs. load current at 25°C.
Turn-on transient at full load current (4ms/div).
Top Trace: Vout; 5V/div; Bottom Trace: ON/OFF input: 5V/div.
Turn-on transient at full load current (4 ms/div).
Top Trace: Vout; 5V/div; Bottom Trace: input voltage: 8V/div.
Output voltage ripple at nominal input voltage and max load
current (10 mV/div, 2us/div)
Load cap: 10µF, tantalum capacitor and 1µF ceramic capacitor.
Bandwidth: 20 MHz.
DS_S24SE/S24DE 20W _10172013
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P4
S24SE/S24DE series
20W Single/Dual Output DC/DC Converter
ELECTRICAL CHARACTERISTICS CURVES - S24DE120R8, 9-36VIN, ± 12V/0.83A
3.5
89
POWER DISSIPATION(W)
87
EFFICIENCY(%)
85
83
36Vin
24Vin
9Vin
81
79
3.0
36Vin
24Vin
2.5
9Vin
2.0
1.5
77
1.0
75
73
0.5
0.2
0.3
0.4
0.5
0.6
0.7
0.8
OUTPUT CURRENT(A)
0.2
0.3
0.4
0.5
0.6
0.7
0.8
OUTPUT CURRENT(A)
Efficiency vs. load current for various input voltage at 25°C.
Power dissipation vs. load current at 25°C.
Turn-on transient at full load current (4ms/div).
Top two Traces: Vout; 6V/div; Bottom Trace: ON/OFF input: 5V/div.
Turn-on transient at full load current (4 ms/div).
Top two Traces: Vout; 6V/div; Bottom Trace: input voltage: 15V/div.
Output voltage ripple at nominal input voltage and max load
current Top trace +12V, 10 mV/div,Bottom trace -12V, 20mV/div,
2us/div.
Load cap: 10µF, tantalum capacitor and 1µF ceramic capacitor.
Bandwidth: 20 MHz.
DS_S24SE/S24DE 20W _10172013
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P5
S24SE/S24DE series
20W Single/Dual Output DC/DC Converter
ELECTRICAL CHARACTERISTICS CURVES - S24DE150R6, 9-36VIN, ± 15V/0.67A
90
3.4
88
POWER DISSIPATION(W)
EFFICIENCY(%)
86
84
82
36Vin
24Vin
80
78
9Vin
76
3.0
36Vin
24Vin
2.6
9Vin
2.2
1.8
74
1.4
72
70
0.1
0.2
0.3
0.4
0.5
0.6
0.7
OUTPUT CURRENT(A)
1.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
OUTPUT CURRENT(A)
Efficiency vs. load current for various input voltage at 25°C.
Power dissipation vs. load current at 25°C.
Turn-on transient at full load current (4ms/div).
Top two traces: Vout; 8V/div; Bottom Trace: ON/OFF input: 5V/div.
Turn-on transient at full load current (4ms/div).
Top two traces: Vout; 8V/div; Bottom Trace: input voltage: 15V/div.
Output voltage ripple at nominal input voltage and max load
current Top trace +15V, 10 mV/div,Bottom trace -15V, 20mV/div,
2us/div.
Load cap: 10µF, tantalum capacitor and 1µF ceramic capacitor.
Bandwidth: 20 MHz.
DS_S24SE/S24DE 20W _10172013
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P6
S24SE/S24DE series
20W Single/Dual Output DC/DC Converter
DESIGN CONSIDERATIONS
Input Source Impedance
The impedance of the input source connecting to the
DC/DC power modules will interact with the modules
and affect the stability. A low ac-impedance input source
is recommended. If the source inductance is more than
a few μH, we advise a 47μF electrolytic capacitor
mounted close to the input of the module to improve the
stability.
Input Reflected Ripple Current
is
ic
Vin+
+
+
Input reflected ripple current, is, through a 12µH source
inductor at nominal input voltage and rated load current
(5 mA/div, 2us/div)
VinCs: 220uF
100uF,
ESR=0.2 ohm @
25oC 100KHz
Output Ripple Noise
Test set-up diagram showing measurement points for
Input Terminal Ripple Current and Input Reflected
Ripple Current.
Measured input reflected-ripple current with a simulated
source Inductance (LTEST) of 12 μH. Capacitor Cs
offset possible battery impedance.
Output voltage ripple test setup.
Load capacitance: 1µF ceramic capacitor and 10µF
tantalum capacitor. Bandwidth: 20 MHz. Scope
measurements should be made using a BNC cable
(length shorter than 20 inches). Position the load
between 51 mm to 76 mm (2 inches to 3 inches) from
the module.
Input Terminal Ripple Current, ic, at full rated output
current and nominal input voltage with 12µH source
impedance and 100µF electrolytic capacitor (75 mA/div,
2us/div).
DS_S24SE/S24DE 20W _10172013
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P7
S24SE/S24DE series
20W Single/Dual Output DC/DC Converter
DESIGN CONSIDERATIONS
Layout and EMI considerations
FEATURES DESCRIPTIONS
Over-Current Protection
Delta’s DC/DC power modules are designed to operate
in a wide variety of systems and applications. For design
assistance with EMC compliance and related PWB
layout issues, please contact Delta’s technical support
team. An external input filter module is available for
easier EMC compliance design. Below is the reference
design for an input filter to pass EN55022 (VDE0878)
class A(both q. peak and average).
The modules include an internal output over-current
protection circuit, which will endure current limiting
for an unlimited duration during output overload. If
the output current exceeds the OCP set point, the
modules will shut down (hiccup mode).
The modules will try to restart after shutdown. If the
overload condition still exists, the module will shut
down again. This restart trial will continue until the
overload condition is corrected.
Over-Voltage Protection
The modules include an internal output over-voltage
protection circuit, which monitors the voltage on the
output terminals. If this voltage exceeds the
over-voltage set point, the modules will shut down,
and then restart after a hiccup-time (hiccup mode).
L1=1uH
C1=47uF/50V, electrolytic capacitor
dBμV
80.0
If latch mode is needed, please contact with Delta.
Limits
55022MAV
55022MQP
70.0
Over-Temperature Protection
60.0
50.0
40.0
Transducer
8130
Traces
PK+
AV
30.0
20.0
The over-temperature protection consists of circuitry
that provides protection from thermal damage. If the
temperature
exceeds
the
over-temperature
threshold the module will shut down.The module will
restart after the temperature is within specification.
10.0
Remote On/Off
0.0
150 kHz
1 MHz
10 MHz
30 MHz
Test Result:
At T = +25C , Typical input voltage and full load.
Green is quasi peak mode; Blue is average mode.
The remote on/off feature on the module can be
either negative or positive logic. Negative logic turns
the module on during a logic low and off during a
logic high. Positive logic turns the modules on during
a logic high and off during a logic low.
Remote on/off can be controlled by an external
switch between the on/off terminal and the Vi (-)
terminal. The switch can be an open collector or
open drain. For negative logic if the remote on/off
feature is not used, please short the on/off pin to Vi
(-). For positive logic if the remote on/off feature is
not used, please leave the on/off pin to floating.
Recommended PCB Layout
It is suggested to use multiple layers PCB and large size
copper on system board which connect to pins of module,
that can achieve better thermal performance.
DS_S24SE/S24DE 20W _10172013
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P8
S24SE/S24DE series
20W Single/Dual Output DC/DC Converter
For 12V signle output(Kohm):
Remote on/off implementation
Output Voltage Adjustment(TRIM)
For 15V single output(Kohm):
Only single output modules has output adjust function.
To increase the output voltage set point, connect an
external resistor between the TRIM pin and the
Vout(-).
To decrease the output voltage set point, connect an
external resistor between the TRIM pin and the
Vout(+).
The maximumu adjust range is ±10%, the TRIM pin
should be left open if this feature is not used.
For 3.3V single output(Kohm):
For example:
When need trim up to 3.4V, then the external resistor
should be 100Kohm between trim pin and Vout- pin.
When need trim down to 3.1V, then the external resistor
should be 40Kohm between trim pin and Vout+ pin.
THERMAL CONSIDERATIONS
For 5V single output(Kohm):
Heat can be removed by increasing airflow over the
module. To enhance system reliability, the power
module’s case temperature should always be operated
below 105℃. If the case temperature exceeds the
maximum operating temperature, reliability of the unit
may be affected.
Air velocity and ambient
temperature test point.
15.0mm
(0.6")
DS_S24SE/S24DE 20W _10172013
AIR FLOW
50.8mm
(2.0")
MODULE
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P9
S24SE/S24DE series
20W Single/Dual Output DC/DC Converter
Mechanical Drawing
Mechanical Dimensions
Pin Connections
Single Output
Pin
Function
Dual Output
Function
1
Vin+
Vin+
2
Vin-
Vin-
3
On/off
On/off
4
Vout-
Vout-
5
Trim
Common
6
Vout+
Vout+
Physical outline
Case Size: 25.4*25.4*9.5(1.0”*1.0”*0.38”)
Case material: Al alloy, anodize black
Baseplate material: Non-coductive FR-4
Pin material: Brass; finish: Matte Tin plating and
Nickel under plating
Pin length: refer part numbering system
Weight: 17.5 grams

All dimensions in mm (inches)

Tolerance: X.X±0.5 (X.XX±0.02)
X.XX±0.25 ( X.XXX±0.010)

Pins Diameter : ±0.10(±0.004)
Application notice:
For modules with through-hole pins, they are intended for wave soldering assembly onto system boards;
please do not subject such modules through reflow temperature profile.
Recommened layout refer below
DS_S24SE/S24DE 20W _10172013
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P10
S24SE/S24DE series
20W Single/Dual Output DC/DC Converter
Mechanical Drawing with heat sink(optional)
Mechanical Dimensions
Physical Outline
1
Heat sink
Material: Al-6063
Finish: anodize black
Weight: 4grams
2
Clamp
Material: spring steel
Finish: Nickel plating
3
Thermal pad
Material: Sil-pad
Thermal conductivity: 1.6W/m-K
4
Model weight: 22.5 grams

All dimensions in mm (inches)

Tolerance: X.X±0.5 (X.XX±0.02)
X.XX±0.25 ( X.XXX±0.010)
Note:
1. add heat sink to help heat dissipation and increase reliability of convert oprating at high ambient temperature
2. please refer derating curve while upgrate the operating temperature of converter
3. heat sink will be mounted for volume orders, separated heat sink only be supplied for prototype
4. for model with heat sink option, the recommended layout only need note the length more larger than without heat sink
DS_S24SE/S24DE 20W _10172013
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P11
S24SE/S24DE series
20W Single/Dual Output DC/DC Converter
Part Numbering System
S
24
S
E
050
04
N
Form
Input
Number
Product
Output
Output
On/off
factor
voltage
of output
series
voltage
current
logic
S
24 – 9~36V
S - Single
E - Series
050 – 5.0V
04 - 4A
D - Dual
No.
N-
D
F
Pin length
D - 0.24”
Negative
P - Positive
A
Option Code
F - RoHS 6/6
(Lead Free)
A – Standard.
(with metal
T - 0.22”
case)
R - 0.17”
H – With heat
sink
CONTACT: www.deltaww.com/dcdc
USA:
Telephone:
East Coast: 978-656-3993
West Coast: 510-668-5100
Fax: (978) 656 3964
Email: DCDC@delta-corp.com
Europe:
Phone: +31-20-655-0967
Fax: +31-20-655-0999
Email: DCDC@delta-es.com
Asia & the rest of world:
Telephone: +886 3 4526107
ext 6220~6224
Fax: +886 3 4513485
Email: DCDC@delta.com.tw
WARRANTY
Delta offers a three (3) years limited warranty.Complete warranty information is listed on our web site or is available upon
request from Delta.
Information furnished by Delta is believed to be accurate and reliable. However, no responsibility is assumed by Delta for
its use, nor for any infringements of patents or other rights of third parties, which may result from its use. No license is
granted by implication or otherwise under any patent or patent rights of Delta. Delta reserves the right to revise these
specifications at any time, without notice.
DS_S24SE/S24DE 20W _10172013
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P12