PoLabs v1.0 Mosfet Power Switch User Manual
- June 17, 2024
- PoLabs
Table of Contents
Mosfet Power Switch
User’s manual
v1.0
v1.0 Mosfet Power Switch
Mosfet Power Switch
User’s Manual
Please read the following notes
- All information included in this document is current as of the date this document is issued. Such information, however, is subject to change without any prior notice.
- PoLabs does not assume any liability for infringement of patents, copyrights, or other intellectual property rights of third parties by or arising from the use of PoLabs products or technical information described in this document. No license, express, implied or otherwise, is granted hereby under any patents, copyrights or other intellectual property rights of PoLabs or others. PoLabs claims the copyright of, and retains the rights to, all material (software, documents, etc.) contained in this release. You may copy and distribute the entire release in its original state, but must not copy individual items within the release other than for backup purposes.
- Descriptions of circuits, software and other related information in this document are provided only to illustrate the operation of the products and application examples. You are fully responsible for the incorporation of these circuits, software, and information in the design of your equipment. PoLabs assumes no responsibility for any losses incurred by you or third parties arising from the use of these circuits, software, or information.
- PoLabs has used reasonable care in preparing the information included in this document, but PoLabs does not warrant that such information is error free. PoLabs assumes no liability whatsoever for any damages incurred by you resulting from errors in or omissions from the information included herein.
- PoLabs devices may be used in equipment that does not impose a threat to human life in case of the malfunctioning, such as: computer interfaces, office equipment, communications equipment, test and measurement equipment, audio and visual equipment, home electronic appliances, machine tools, personal electronic equipment, and industrial robots.
- Measures such as fail-safe function and redundant design should be taken to ensure reliability and safety when PoLabs devices are used for or in connection with equipment that requires higher reliability, for example: traffic control systems, anti-disaster systems, anticrime systems, safety equipment, medical equipment not specifically designed for life support, and other similar applications.
- PoLabs devices shall not be used for or in connection with equipment that requires an extremely high level of reliability and safety, as for example: aircraft systems, aerospace equipment, nuclear reactor control systems, medical equipment or systems for life support (e.g. artificial life support devices or systems), and any other applications or purposes that pose a direct threat to human life.
- You should use the PoLabs products described in this document within the range specified by PoLabs, especially with respect to the maximum rating, operating supply voltage range and other product characteristics. PoLabs shall have no liability for malfunctions or damages arising out of the use of PoLabs products beyond such specified ranges.
- Although PoLabs endeavors to improve the quality and reliability of its products, semiconductor products have specific characteristics such as the occurrence of failure at a certain rate and malfunctions under certain use conditions. Further, PoLabs products are not subject to radiation resistance design. Please be sure to implement safety measures to guard them against the possibility of physical injury, and injury or damage caused by fire in the event of the failure of a PoLabs product, such as safety design for hardware and software including but not limited to redundancy, fire control and malfunction prevention, appropriate treatment for aging degradation or any other appropriate measures.
- Usage: the software in this release is for use only with PoLabs products or with data collected using PoLabs products.
- Fitness for purpose: no two applications are the same, so PoLabs cannot guarantee that its equipment or software is suitable for a given application. It is therefore the user’s responsibility to ensure that the product is suitable for the user’s application.
- Viruses: this software was continuously monitored for viruses during production; however, the user is responsible for virus checking the software once it is installed.
- Upgrades: we provide upgrades, free of charge, from our web site at www.poscope.com. We reserve the right to charge for updates or replacements sent out on physical media.
- Please contact a PoLabs support for details as to environmental matters such as the environmental compatibility of each PoLabs product. Please use PoLabs products in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances, including without limitation, the EU RoHS Directive. PoLabs assumes no liability for damages or losses occurring as a result of your noncompliance with applicable laws and regulations.
- Please contact a PoLabs support at support@poscope.com if you have any questions regarding the information contained in this document or PoLabs products, or if you have any other inquiries.
- The licensee agrees to allow access to this software only to persons who have been informed of and agree to abide by these conditions.
- Trademarks: Windows is a registered trademark of Microsoft Corporation. PoKeys, PoKeys55, PoKeys56U, PoKeys56E, PoScope, PoLabs and others are internationally registered trademarks.
Introduction
The Mosfet Power Switch Adapter is intended to switch power loads up to 20A.
It has P-channel power mosfet which means it is a high side switch and GND is
directly connected to the load. The input control signal is galvanically
isolated from the load and high voltage side. That way digital part has better
EMC immunity and you can avoid ground loops or interference. The maximum
voltage on the load side is 48V. For digital signal the minimum voltage is
3.3V and maximum at 5V. The adapter has small form factor with heatsink to
dissipate heat when high power load is used (!!CAREFUL, heatsink is connected
to the OUTPUT voltage – do not connect to GND or any potential!!). The hole
spacing on the PCB allows for mounting with our DIN rail moung adapter.
Main Features:
- 48V, 20A load capacity
- 3.3V – 5V digital control signal
- 1kHz load switching capacity
- Optically isolated digital input
- Heatsink for better heat dissipation
- LED for visual signalling
- DIN mounting option
Connectors and pinout
Pin description
Power:
| IN | Positive polarity input power pin |
|---|---|
| OUT | Switched output positive polarity power pin |
| GND | Power GND (not connected to the digital GND) |
Digital:
| CTRL+ | Digital input + pin (can be connected to I/O or power supply) |
|---|---|
| GND | Digital input – pin (can be connected to GND or switched to GND via FET) |
Mechanical dimensions
Grant of license
The material contained in this release is licensed, not sold. PoLabs grants a
license to the person who installs this software, subject to the conditions
listed below.
4.1.1 Access
The licensee agrees to allow access to this software only to persons who have
been informed of and agree to abide by these conditions.
4.1.2 Usage
The software in this release is for use only with PoLabs products or with data
collected using PoLabs products.
4.1.3 Copyright
PoLabs claims the copyright of, and retains the rights to, all material
(software, documents etc) contained in this release. You may copy and
distribute the entire release in its original state, but must not copy
individual items within the release other than for backup purposes.
4.1.4 Liability
PoLabs and its agents shall not be liable for any loss or damage, howsoever
caused, related to the use of PoLabs equipment or software, unless excluded by
statute.
4.1.5 Fitness for purpose
No two applications are the same, so PoLabs cannot guarantee that its
equipment or software is suitable for a given application. It is therefore the
user’s responsibility to ensure that the product is suitable for the user’s
application.
4.1.6 Mission Critical applications
Because the software runs on a computer that may be running other software
products, and may be subject to interference from these other products, this
license specifically excludes usage in ‘mission critical’ applications, for
example life support systems.
4.1.7 Errors
This manual was continuously monitored for errors during production; however,
the user is responsible for error checking the manual once it is used.
4.1.8 Support
There could be errors in these manuals, but if you found some, please contact
our technical support staff, who will try to fix the problem within a
reasonable time.
4.1.9 Upgrades
We provide upgrades, free of charge, from our web site at www.PoLabs.com. We
reserve the right to charge for updates or replacements sent out on physical
media.
4.1.10 Trademarks
Windows is a registered trademark of Microsoft Corporation. PoKeys, PoKeys55,
PoKeys56U, PoKeys56E, PoKeys57U, PoKeys57E, PoKeys57CNC, PoScope, PoLabs,
PoExtBus, PoExtBus Smart, PoRelay8, PlasmaSens and others are internationally
registered trademarks.
Support: www.PoLabs.com
www.PoLabs.com
References
- PoLabs web store - Polabs
- PoLabs web store - Polabs
- DIN rail mount adapter - Mount your PCB to DIN rail.