***Question*** *Anything wrong with connecting L298Ns in parallel?* --- **Answer** *Nothing wrong. Hobbyists do it. Engineers can also do it. It all depends on cost/benefit/risk hobbyist/engineer trade offs.* Let me explain, starting with ULN2803, then L298N. *Part 1 - ULN2803A Case* [ULN2803A Darlington Transistor Arrays - TI][1] From datasheet - Section 3 Description The ULN2803A device is a 50V, 500 mA Darlington transistor array. The device consists of eight NPN Darlington pairs that feature high-voltage outputs with common-cathode clamp diodes for switching inductive loads. The collector-current rating of each Darlington pair is 500 mA. ***The Darlington pairs may be connected in parallel for higher current capability.*** --- *Part 2 - L298N Case* [L298N Datasheet - ST][2] By the same ULN2803 token, L298N can also parallel output for bigger current. Since the BJTs to be paralleled are fabricated from the same die/chip, they should very nicely selfie balancing out the load current. --- [![l298n 1][3]][3] --- [![l298n 2][4]][4] --- *Part 3 - L298N Dual Full Bride DC Motor Driver Module Case* [AliExpress L298N Dual Full H Bridge DC Motor Driver Module - US$1][5] The very popular cheapy L298N motor driver modules are for driving two 4A DC motors. For a bigger motor, say 8A, we can parallel two drivers into one big driver. Warning: me just friendly hobbyist. No guarantee no nothing would melt down or blow up. --- *Part 4 - Discussion and Recommendation* L298N output paralleling for bigger output current is a good newbie workaround. For ninjas, I would recommend forgetting the little old guy L298N, and go instead for the 40A big guy ***BTN7971B***. For more details on BTN7971B, see Refs 11.4, 11.5, and 11.6 of my answer to the following motor driver Q&A. [DC Motor Driver Q&A - EESE][6] --- ***Part 5 - Proof of Concept*** To prove my guess is correct, I am using a L298N module with the two channels' output paralleled, and measure the two channels's current when driving one DC motor. Below is the test procedure. 1. Setup a L298N module to drive two 12V DC motors, to make sure both H-Bridges are working correctly. 2. Remove one of the motor, and parallel both channel's outputs to drive the remaining one motor. 3. Use two multi-meters to measure each H-Bridge's output current, to see if they are balanced or not. --- [![l298n test][7]][7] --- YouTube Video - [L298N Module Driving Two DC Motors][8] --- *Part 6 - How to measure each of the two H-bridge output current to DC motor?* L298N has two current sense pins to measure the output current, using a current sense resistor, shown in pink/green/blue in the schematic below below (Also shown as ***Sense A, Rsa, and Sense B, Rsb*** in the last diagram of Part 2 above.). --- [![l298n current sense][9]][9] --- */ to continue, ...* [1]: https://www.ti.com/lit/ds/symlink/uln2803a.pdf?ts=1616825443744&ref_url=https%253A%252F%252Fwww.google.com%252F [2]: https://www.st.com/resource/en/datasheet/l298.pdf [3]: https://i.sstatic.net/3XMSr.jpg [4]: https://i.sstatic.net/wRe9r.jpg [5]: https://fr.aliexpress.com/item/4001175036525.html?spm=a2g0o.search0302.0.0.5ab31cc6QSHakX&algo_pvid=f71aa4cb-f623-4a20-b2ef-553c0ca9a2c1&algo_expid=f71aa4cb-f623-4a20-b2ef-553c0ca9a2c1-25&btsid=0b0a555416168995427627943e6913&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_ [6]: https://electronics.stackexchange.com/questions/510755/help-with-choice-of-dc-motor-speed-control-pwm-vs-regulator/510834#510834 [7]: https://i.sstatic.net/7TbJA.jpg [8]: https://youtu.be/N_S0UhgZozE [9]: https://i.sstatic.net/WnHTk.jpg