New products: G2 High-Power Motor Driver 18v25 and 24v21 (and price drops for other G2 drivers)

Posted by Kevin on 3 March 2016

Our second-generation family of high-power motor drivers continues to grow with the release of our G2 High-Power Motor Driver 18v25 and G2 High-Power Motor Driver 24v21, discrete MOSFET H-bridges that can supply a brushed DC motor with up to 25 A of continuous current at up to 30 V or up to 21 A of current at up to 40 V, respectively. In addition, we’ve lowered the prices of the 18v17 and 24v13 versions to make them even more affordable.

The new G2 18v25 and G2 24v21 drivers’ double-sided design allows them to retain the same board dimensions as their 18v17 and 24v13 siblings, even though they can deliver significantly more power. The G2 drivers are half an inch shorter and can handle the same (or slightly more) current compared to the original 18v25 and 24v20 they are designed to replace, and they are less than half the size of the original 18v25 CS and 24v23 CS while offering basic current sensing functionality that can eliminate the need for a dedicated current sensor in some applications. As with previous G2 drivers, they also include reverse-voltage protection and a current limiting feature.

Pololu G2 High-Power Motor Driver 24v21 next to original high-power motor driver 24v20 and 24v23 CS.

Pololu G2 High-Power Motor Driver 24v21 and 24v13.

For more information about the G2 motor drivers, see their product pages at the links below.

12 comments

Is the gate driver being used on this board, by any chance, the DRV8701?
Hi, Gino.

We do not commit to or disclose the components used on our G2 high-power motor drivers.

-Claire
What is the Rdson of the mosfets?

Thx
Hi.

We do not commit to the exact MOSFETs on these, but the Rds(on) is around 1 mohm for the 18v25 and 2.4 mohms for the 24v21. Keep in mind that there are 3 MOSFETs in the current path because of the reverse protection MOSFET.

-Claire
With how much continuous current can G2 24v21 H-bridge supply a brushed DC motor at 24 V and 26 V, with and without heat sink ? Thanks in advance
Hi, Tech.

In our tests the G2 High-Power Motor Driver 24v21 was able to handle 21A continuously. Those tests were done in open air at room temperature, so you might see a decrease in performance if your driver is enclosed or in a hot environment. We do not expect varied input voltages to have a significant impact on the continuous current the driver can handle. We did not test the driver with heatsinks, but adding a heatsink would probably slightly improve the amount of current it can handle.

-Claire
Hi,

Can this be controlled using an Arduino? If so, would it just be the GND, PWM and DIR pins that are needed to control it?
Hello, Callum.

Those G2 motor drivers will work fine with Arduino controllers, and the pins you mentioned are the minimum required connections to the Arduino. You can see more about the functions of each pin on the driver in the truth table in the "Motor control options" sections of those driver's product pages in the links above.

-Derrill
This motor driver is written as "very important to install a large capacitor across the motor supply and ground close to the motor driver".
Does this mean that you put capacitors in OUTA - GND and OUTB - GND respectively?
Hello, kodenma.

The motor supply pin is labeled VIN, so you should put the capacitor across VIN and GND.

-Derrill
Thank you,Derrill
Sorry, I have another question.
There is a + - terminal on this base and it is for the power supply capacitor, is the above capacitor different from it?
Yes, the + and - locations are the intended location for adding a capacitor to the motor power supply. You can also add additional capacitance across VIN and GND if you need it.

-Derrill

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Related Products

Pololu G2 High-Power Motor Driver 18v25
Pololu G2 High-Power Motor Driver 24v21
Pololu G2 High-Power Motor Driver 18v17
Pololu G2 High-Power Motor Driver 24v13
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