MLA668633554
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This IRF520 Mosfet Driver module is easy to hookup to your Arduino or the other 3-5V microcontroller. The module designed to switch heavy DC loads from a single digital pin of your microcontroller. Its main purpose is to provide a low cost way to drive a DC motor for robotics applications, but the module can be used to control most high current DC loads. Screw terminals are provided to interface to your load and external power source.
Specification:
Note: Above 1A load, you need to install heat sink
The IRF520 N-Ch MOSFET Module can control loads up to 24V @ 5A.
The IRF520 is not fully 5V logic compatible but it will work fine for many applications if it is derated to the specs we show here. See our evaluation results down below for more detail on that aspect of the module.
These modules can be used to control motors, fans, LEDs and other devices.
The connectors can look a bit confusing at first, but hook-up is fairly straight forward. The attached schematic can help clarify things.
To hook-up:
The ‘SIG’ control input is active HIGH and 5V compatible, but can be driven as high as 10V to drive the IRF520 into full saturation. There is a green LED that lights when SIG is active HIGH
A 1K pull-down resistor is included on the module to help to ensure that the transistor will be in the off state when the microcontroller is powering up and the outputs are floating.
1 x 3 Male Header
1 x 2 Screw Terminal (Load)
1 x 2 Screw Terminal (Power)
The IRF520 MOSFET device is actually rated for up to 100V @ 9.7A. That rating assumes that it is being driven by a gate voltage of 10V to fully turn the device on with good heat sinking, etc.
Since this module is mainly designed to be used with an Arduino or similar uC that can only drive 5V, the IRF520 will not be driven to full saturation and therefore will dissipate more heat. For that reason it needs to be derated from the theoretical maximum specs which is how we end up with our 24V @ 5A rating.
In our load testing, driving it with a 5V logic signal and pulling 3A continuous resulted in 56C on the tab and 3.5A resulted in 71C which is about as high as I would drive it unless a heat sink is added. If the transistor is being quickly switched such as when using PWM, pulling 5A is possible without a heat sink. At a 50/50 duty cycle with 5A we measured 75C. These measurements were all made with no heatsink.
I don’t recommend using this module with 3.3V logic since the thermal performance will be worse, but if you do, limit the current to about 1A to be on the safe side.
Notes:
Maximum Ratings | IRF520 Device Specs | |
VDSS | Drain-Source Voltage | 100V (24V in this application) |
ID | Drain Current | 9.7A (5A in this application) |
RDS | Drain-Source On-Resistance | 0.25Ω (at 10V gate) |
PD | Power Dissipation | 48W (requires heat sink) |
Package | TO-220 | |
Package Type | Plastic Tab, 3-lead, through hole | |
Mfr | International Rectifier | |
Datasheet |