Ebyte AM21-3W12V User manual

Chengdu Ebyte Electronic Technology Co.,Ltd AM21-3W12V User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd
1
AM21-3W12V
100-250V to 12V 3W, AC-DC Power Supply Module

Chengdu Ebyte Electronic Technology Co.,Ltd AM21-3W12V User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd
2
Contents
1.Product introduction ..................................................................................................................................................................4
1.1. Brief introduction .......................................................................................................................................................... 4
1.2. Characteristic .................................................................................................................................................................4
1.3. Application scenarios .................................................................................................................................................... 4
2.Specification parameter .............................................................................................................................................................5
2.1. Limit parameter ............................................................................................................................................................. 5
2.2. Work parameters ............................................................................................................................................................5
2.3. Work efficiency and load .............................................................................................................................................. 6
2.4. Boot time ....................................................................................................................................................................... 7
2.5. Full-load ripple ...........................................................................................................................................................7
2.6. Working frequency ........................................................................................................................................................ 7
3.basic operation ...........................................................................................................................................................................8
3.1. Matters needing attention ..............................................................................................................................................8
3.2. Typical application ........................................................................................................................................................ 8
4.Mechanical characteristics and pin definition ...........................................................................................................................8
4.1. Product size ................................................................................................................................................................... 8
4.2. Pin definition ................................................................................................................................................................. 9
5.Product selection ....................................................................................................................................................................... 9
About us ......................................................................................................................................................................................10

Chengdu Ebyte Electronic Technology Co.,Ltd AM21-3W12V 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 AM21-3W12V User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd
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1.Product introduction
1.1. Brief introduction
AM21-3W12V is series of low-power AC-DC step-down power supply
module, module internal design strictly comply with UL60950 safety
design specifications, and comply with FCC Part 15B:2016; EN55035:2017;
EN61000-3-2:2014 EN 61000-3-3:2013, EN 55032:2015. Users do not need to
add additional costs in the module peripherals, which greatly reduces the user
design threshold. Wide voltage 100-250V input, maximum input up to 264V,
all components from the regular procurement channels, users do not need
to worry about stability, when in complex voltage environment ,it also can
supply output steadily.
1.2. Characteristic
Ultra-small volume: two installation modes (horizontal and vertical) are suitable for various applications.
Over-current protection: The module can be automatically restored by preset constant current limitation
internal Module.
High-quality scheme: improving its work efficiency, the average efficiency of 80%.
Over-temperature protection: Module internal preset maximum operating temperature, can be automatically
restored.
Short-circuit protection: the module is equipped with short-circuit protection measures, belching mode,
automatic recovery after the elimination of fault status.
Safety Specification: Module design conforms to UL60950, users do not need to add security authentication
components in the module peripherals.
1.3. Application scenarios
Intelligent home and Industrial sensors, etc.；
Internal power supply system of security alarm；
Industrial control；
MCU motherboard, toys；
Supply LED driving Lamp belt with Power；
Intelligent street lamp；
Intelligent switch, socket；

Chengdu Ebyte Electronic Technology Co.,Ltd AM21-3W12V User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd
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2.Specification parameter
2.1. Limit parameter
No.
Main
parameter
Minimum
Maximum
Remarks
1
Input voltage
（Vac）
100
250
Work voltage should not exceed 250 Vac, otherwise it may be
permanently damaged.
2
output power
（W）
0
3
Load power should not exceed 100%. It is recommended that the
load power should be less than 90%.
3
working
temperature
（℃）
-40
+80
Full load limit operating temperature is 60 ℃.
2.2. Work parameters
No.
Main
parameter
Minimum
Typical
value
Maximum
Remarks
1
Input
voltage(Vac)
100
220
250
Recommended operating voltage : 110 ~ 250V
2
Work
frequency(Hz)
-
50/60
-
Hz
3
Output
power(W)
0
-
3
Maximum Continuous Output Power of 3 Watts
4
Work
temperature
(℃)
-40
+80
60
Full load operation
5
Power factor
0.4
-
0.55
>0.55 at 120Vac / >0.4 at 230Vac Full load
6
Surge
current(Max)
-
-
10
10 A at 230 Vac
7
Static power
(mA)
-
-
1.0
< =1 mA / 240Vac
8
Output
voltage(Vdc)
11.9
12
12.2
V
9
Persistent
current(A)
0
-
0.25
A
10
Ripple
noise(mV)
12
-
30
mV

Chengdu Ebyte Electronic Technology Co.,Ltd AM21-3W12V User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd
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11
Average
efficiency(n%)
-
80
-
%
12
Over current
protection(%)
110
-
150
%
13
Short circuit
protection
-
-
-
hiccup mode, automatic recovery after elimination of
failure state
14
Work humidity
(RH%)
20
-
90
non-condensing
15
Storage
temperature
(℃)
-40
+25
+80
Dry storage at normal temperature;
16
Storage
humidity
(RH%)
10
-
90
Dry storage at normal temperature;
17
Withstand
voltage test
-
-
1500
I/P - O/P: 1500 KVAC
18
Insulation
impedance
-
-
100
I/P - O/P: 100M ohms / 500VDC at 25 ℃
2.3. Work efficiency and load

Chengdu Ebyte Electronic Technology Co.,Ltd AM21-3W12V User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd
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2.4. Boot time
INPUT:AC 120V OUTPUT:5V 0.6A INPUT:AC 230V OUTPUT:5V 0.6A
2.5. Full-load ripple
INPUT:AC 120V OUTPUT:5V 0.6A INPUT:AC 230V OUTPUT:5V 0.6A
2.6. Working frequency
INPUT:AC 120V OUTPUT:5V 0.6A INPUT:AC 230V OUTPUT:5V 0.6A

Chengdu Ebyte Electronic Technology Co.,Ltd AM21-3W12V User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd
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3.basic operation
3.1. Matters needing attention
Operating this module requires certain professional skills, prohibit non-professionals operate on it!
Before using it, you must study knowledge of safe use.
Prohibit human body contact with L and N power lines after electrification to prevent accidents caused by
electric shock.Recommend input front-end to Increase isolation.
The maximum input voltage shall not exceed 250 Vac, otherwise may occur permanent damage .
In daily maintenance, the input power should be disconnected to prevent from electric shock accidents.
3.2. Typical application
*Note: Input and output need not add any components to meet the requirements of security certification.
4.Mechanical characteristics and pin definition
4.1. Product size

Chengdu Ebyte Electronic Technology Co.,Ltd AM21-3W12V User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd
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4.2. Pin definition
No.
Pin name
Orientation
Use
1
L
input
AC power input: 100-250V, more than 250V will cause permanent damage to
the module
2
N
input
AC power input: 100-250V, more than 250V will cause permanent damage to the module
3
-
output
direct-current output，power ground
4
+
output
direct-current output, positive power supply
5.Product selection
Product model
Input voltage
Output
voltage
Output
current
Efficiency
Installation mode
AM21-3W033V
100 ~ 250Vac
3.3Vdc
0.9A
75%
Plastic package plug-ins
AM21-3W05V
5.0V
0.6A
78%
Plastic package plug-ins
AM21-3W12V
12V
0.25A
80%
Plastic package plug-ins
Revision history
No.
vision
modification
date
Revision notes
Maintain
person
1
V1.0
20190301
First edition, first public release
Deng

Chengdu Ebyte Electronic Technology Co.,Ltd AM21-3W12V User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd
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About us
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