Ebyte DM4-20W1212B1 User manual

Chengdu Ebyte Electronic Technology Co.,Ltd DM41-20W1212B1 User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd
1
DM41-20W1212B1 User Manual
20w Isolated-buck DC-DC Power Supply

Chengdu Ebyte Electronic Technology Co.,Ltd DM41-20W1212B1 User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd
2
Contents
Disclaimer.......................................................................................................................................................................... 3
1.Product introduction........................................................................................................................................................4
1.1. Brief introduction................................................................................................................................................ 4
1.2. Product features................................................................................................................................................... 4
1.3. Application scenarios.......................................................................................................................................... 4
2.Specification parameters................................................................................................................................................. 5
2.1. Limit parameters..................................................................................................................................................5
2.2. Working parameters............................................................................................................................................ 5
2.3. Working frequency and load............................................................................................................................... 6
2.4. Input derating design........................................................................................................................................... 6
3.Basic operation................................................................................................................................................................7
3.1. Matters need attentions........................................................................................................................................7
4.Mechanical Characteristics and Pin Definition...............................................................................................................7
4.1. Product size..........................................................................................................................................................7
4.2. Pin Definition...................................................................................................................................................... 7
4.3. Typical application.............................................................................................................................................. 8
5. Product selection............................................................................................................................................................ 8
Revision history................................................................................................................................................................. 8
About us............................................................................................................................................................................. 9

Chengdu Ebyte Electronic Technology Co.,Ltd DM41-20W1212B1 User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd
3
Disclaimer
EBYTE reserves all rights to this document and the information contained herein. Products,
names, logos and designs described herein may in whole or in part be subject to intellectual
property rights. Reproduction, use, modification or disclosure to third parties of this
document or any part thereof without the express permission of EBYTE is strictly
prohibited.
The information contained herein is provided “as is” and EBYTE assumes no liability for the
use of the information. No warranty, either express or implied, is given, including but not
limited, with respect to the accuracy, correctness, reliability and fitness for a particular
purpose of the information. This document may be revised by EBYTE at any time. For most
recent documents, Please visit www.ebyte.com

Chengdu Ebyte Electronic Technology Co.,Ltd DM41-20W1212B1 User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd
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1.Product introduction
1.1. Brief introduction
The DM41-20W1212B1 is a low power isolated-buck DC-DC power supply module with a
continuous external power output of 20W and a wide voltage input of 9~18V, with a maximum
efficiency of 80% and low heat generation, significantly reducing the user's design threshold. All
components are from the formal channels of purchase, and the industrial grade design -40~85°C
enables stable output even in complex voltage environments.
1.2. Product features
Isolated-buck: filters out power peaks and effectively protects back-end load equipment from damage;
Output power: 20W/12V/1666mA, continuous output;
Ultra-small size: 50.8*25.4*11mm, metal casing;
Overcurrent protection: the module has an internal preset maximum operating current, which can be automatically recovered
after fault elimination;
Protection measures: over voltage protection, over current protection, short circuit protection, over temperature protection;
Short-circuit protection: automatic recovery after fault elimination;
Isolation withstand voltage: 1000V;
1.3. Application scenarios
Power supply for industrial control equipment
RS485/RS232/CAN communication devices
Solenoid valves/relays
Intelligent robots
Wireless communication devices
Industrial control motherboards
Vehicle-mounted power supplies
Charging pile power supply systems
Smart home as well as industrial sensors, etc
Internal power supply systems for security alarms
Microcontroller motherboards (MCUs), toys
Power supply for LED-driven light strips
Intelligent street lights

Chengdu Ebyte Electronic Technology Co.,Ltd DM41-20W1212B1 User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd
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2.Specification parameters
2.1. Limit parameters
Serial
number
Main
parameter
Minimum
Maximum
Mark
1
Input voltage
（Vac）
8.8
18.5
Vdc(Do not operate above 18Vdc, otherwise it may be permanently
damaged )
2
Output power
（W）
0
20
W
3
Work
temperature
（℃）
-40
+85
ta=40℃,tc=85℃
2.2. Working parameters
Serial
number
Main parameter
Minim
um
Typical
value
Maximum
Remarks
Input
Input Voltage
(DC)
9
12
18V
Vdc
Working
frequency
280
300
330
KHz
Static power
-
-
< 0.4
W
Maximum
efficiency
-
-
80
%
Output
Output voltage
11.95
12
12.15
V
Continuous
current
0
-
1666
mA
Output power
0
-
20
W
Ripple noise
10
-
50
mV
Voltage
Regulation Range
-
±0.5
-
V
Output voltage
accuracy
-
-
±1
%
Start-up time
400
550
1000
ms
Linearity
Adjustment Ratio
-
0.5
-
%
Load Adjustment
Ratio
-
1.0
-
%
Protection
Overcurrent
protection
110
-
150
%

Chengdu Ebyte Electronic Technology Co.,Ltd DM41-20W1212B1 User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd
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2.3. Working frequency and load
INPUT:AC 120V INPUT:AC 230V
2.4. Input derating design
INPUT:AC 120V INPUT:AC 230V
Short circuit
protection
-
-
-
Hiccup mode, automatic recovery when fault condition
is removed
Environment
Operating
temperature
-40
25
85
ta=40℃,tc=85℃
Operating
Humidity
20
-
90
Non-condensing
Storage
Temperature
-40
+25
+85
Dry storage at normal temperature
Storage Humidity
10
-
90
Dry storage at normal temperature
Safety
regulations
Insulation
withstand voltage
-
-
1000
VAC I/P - O/P
Insulation
resistance
-
-
500
I/P - O/P: 100M ohms / 500VDC at 25 ℃
Safety regulation
Conforms to FCC CE ROHS certification standards
Other
Product
Dimension
50.8x25.4x11mm
Product weight
21.5
22
22.5
g

Chengdu Ebyte Electronic Technology Co.,Ltd DM41-20W1212B1 User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd
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3.Basic operation
3.1. Matters need attentions
Operating this module requires certain professional skills, prohibit non-professionals operate on it!
Before using it, you must study Knowledge of safe use carefully.
Prohibit human body contact with the components.
The maximum input voltage must not exceed 18Vdc, otherwise may occur permanent damage.
The temperature is high when operating at full load, do not touch!
The outputs must not be directly short-circuited, as this may cause permanent damage to the module.
The overcurrent protection function is only valid at VIN = 9~12V, the overcurrent point will become larger above 12V, so be
cautious!
4.Mechanical Characteristics and Pin Definition
4.1. Product size
4.2. Pin Definition
Serial
number
Pin
name
Direction
Use
1
Vi-
Input
Power input negative
2
Vi+
Input
Power input positive
3
Vo+
Output
Power output positive
4
Vo-
Output
Power output negative

Chengdu Ebyte Electronic Technology Co.,Ltd DM41-20W1212B1 User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd
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4.3. Typical application
5. Product selection
Product model
Input voltage
Output 1
Output 2
Efficiency
Installation mode
DM41-20W1205B1
9.0 ~ 18Vdc
5Vdc
4000mA
80%
Plastic-package
plug-ins
DM41-20W1212B1
9.0 ~ 18Vdc
12Vdc
1666mA
80%
Plastic-package
plug-ins
DM41-10W2405B1
18 ~ 36Vdc
5Vdc
4000mA
80%
Plastic-package
plug-ins
DM41-10W2412B1
18 ~ 36Vdc
12Vdc
1666mA
80%
Plastic-package
plug-ins
Revision history
Serial number
vision
modification date
Revision notes
Maintain person
1
V1.0
20190917
First edition, first public release.
LJ

Chengdu Ebyte Electronic Technology Co.,Ltd DM41-20W1212B1 User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd
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About us
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