EBYTE DM21-36W12S 36W Step-Down DC-DC Power Module User Manual
- June 5, 2024
- ebyte
Table of Contents
DM21-36W12S User Manual
36W Step-down DC-DC Power Module
Product introduction
1.1. Brief introduction
DM21-36W12S is a DC-DC (DC-DC) low-power power supply step-down Module, the
continuous external output power of 36W, wide voltage 15 ~ 24V input, the
highest input It can reach 26V, which greatly reduces the user’s design
threshold.
All components come from regular procurement channels Road, industrial-grade
design -40~85℃, even in extremely complex voltage environment, it can Stable
output.
1.2. Product features
- Ultra-small size: 31.817.85.6mm;
- Output power: 12V/3A=36W power can be output continuously;
- Synchronous rectification: adopts synchronous rectification scheme design, with large current, low-temperature rise, and high conversion efficiency;
- Over-temperature protection: The maximum operating temperature is preset inside the module, which can be automatically restored;
- Working voltage: wide working voltage 15~24V input can work stably;
- Ultra-low ripple: output ripple <50mV under full power load;
1.3. Application scenarios
- Power Supply System of Charging Pile；
- 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；
Specification parameters
2.1. Limit parameters
No.| Main parameter| Minimu m| Maximum|
Remarks
---|---|---|---|---
1| Input voltage (Vdc)| 14.5| 26| V ( no more than 26Vac，or it will damage )
2| Output power（W）| 0| 36| W
3| Working temperatu（℃）| -40| +85| ℃
2.2. Operating parameters
No.
| Main parameter| Minimu m| Typical value| Maximum|
Remarks
---|---|---|---|---|---
1| Input voltage(Vdc)| 15| –| 24| V
2| Working frequency (Hz)| –| 500| –| KHz
3| Output power(W)| 0| –| 36| W
4| Working temperature ( ℃ )| -40| +25| 85| ℃
5| Power-off current/EN=Low| –| 3| 10| uA
6| Static power/EN=High| –| –| 1.0| < 1 mA
7| Output voltage(Vdc)| 11.9| 12.1| 12.2| V
8| Persistent current(mA)| 0| –| 3| A
9| Ripple noise(mV)| 10| 25| 50| <50mV
10| Maximum efficiency (n%)| 92| –| 95| %
11| Over-current protection(%)| –| –| –| None
12| Working temperature(RH%)| 10| –| 90|
13| Storage temperature(℃)| -10| +25| +50|
14| Storage humidity (RH%)| 10| –| 90|
15| Normal operating life| –| 50000| –| H
2.3.Work efficiency and load
Basic operation
3.1.Notes
-
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 18Vdc, otherwise may occur permanent damage.
-
In daily maintenance, the input power should be disconnected to prevent electric shock accidents.
Mechanical Characteristics and Pin Definition
4.1. Product size
4.2. Pin Definition
| No. | Pin | Direction | Details |
|---|---|---|---|
| 1 | Vo+ | Output | DC output, power supply is positive |
| 2 | Vo- | Output | DC output, power ground |
| 3 | Vi- | Input | DC input, power ground |
| 4 | Vi+ | Input | DC input, positive power supply (15~24Vdc, more than 26V will |
cause permanent damage to the module)
5| Vi+| Input| DC input, positive power supply (15~24Vdc, more than 26V will
cause permanent damage to the module)
Product selection
Product model| Input voltage| Output voltage| Output current| Effici ency|
Installation mode
---|---|---|---|---|---
DM21-30W09S| 8.0 ~ 36Vdc| 5Vdc| 3.3A| 93%| SOC SMD, DIP available
DM21-30W09V| 8.0 ~ 36Vdc| 5Vdc| 3.3A| 93%| DIP
DM21-36W12S| 14.5 ~ 36Vdc| 12Vdc| 3A| 95%| SOC SMD, DIP available
DM21-36W120V| 14.5 ~ 36Vdc| 12Vdc| 3A| 95%| DIP
Revision history
| No. | Vision | Modification date | Revision notes | Maintain person |
|---|---|---|---|---|
| 1 | V1.0 | 20210325 | First edition, first public release | LJ |
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