I want to supply 3V motors with maximum 300mA (that's the stall current).
That is, the power = 0.9W.
The H-bridge can supply 0.4A (average) and dissipates 0.95W when mounted on 50mm*50mm*1.6mm PCB board with 30% of copper area.
The power supply in the lab can draw maximum 3A, so I'm wondering how it will work on 15 MOTORS when the motors are to connected to each H-bridges on one PCB of 50mm*50mm area and 1.6mm thickness.
1. What does it mean by 30% of copper area on PCB?
2. Do the PCB over heat if there are several H-bridges (each dissipating 0.9W) on one PCB with 50mm*50mm*1.6mm?
3. Since there's nothing such as 'identical', would some H-bridges have more current flowing through it than other H-bridges, making some motors to run around 0.4A and burning them up?
thanks to all of you who can help me with the questions above.
That is, the power = 0.9W.
The H-bridge can supply 0.4A (average) and dissipates 0.95W when mounted on 50mm*50mm*1.6mm PCB board with 30% of copper area.
The power supply in the lab can draw maximum 3A, so I'm wondering how it will work on 15 MOTORS when the motors are to connected to each H-bridges on one PCB of 50mm*50mm area and 1.6mm thickness.
1. What does it mean by 30% of copper area on PCB?
2. Do the PCB over heat if there are several H-bridges (each dissipating 0.9W) on one PCB with 50mm*50mm*1.6mm?
3. Since there's nothing such as 'identical', would some H-bridges have more current flowing through it than other H-bridges, making some motors to run around 0.4A and burning them up?
thanks to all of you who can help me with the questions above.