This is my first attempt on a 60V to 3.3V DC/DC converter. I am using the reference diagram for TPS54060 with a few modifications. Starting at left I use a SS16 Shotky diode + a 1000uF since this is for a motor driver. You can otherwise use far less capacitance on the input. I left…
The drawing below illustrate my New, planned DRV8313 based BLDC Controller Design: This will give a small BLDC Controller capable of 8V to 60V operation with up to 2.5A on 3-Phase motors with or without Hall sensors. 8-60V operation Perfect for 12V, 24V or 48V systems. Up to 2.5A motors Sensorless or Hall Sensor driven…
I found 2 series of DC/DC converters that can handle 60-75V from TI that also is available from AliExpress showing that they have some popularity. These all cost around 1.2 USD from my sources and are decently small. These converters consist of a chip with build in MOSFET’s and PWM generator so you basically add…
This show DRV8313 used as a PWM driver on a PLC Module. This way I can get from 12 to 24 PWM channels with up to 60V @ 2A each. This gives an insane combination of 8 x BLDC Motors, 6 stepper motors, 12 DC Motors and 24 Solenoids. I need to think about this…
If you search for schematics you will notice that DRV8313 is far more popular than DRV10983. DRV10983 only support 28V, while DRV8313 support 60V, but the most important difference is that DRV10983 needs to be programmed through I2C while DRV8313 have direct PWM per half H-Bridge. The 3D model above show the DRV8301 based design…
This is an old PWM Module drawing. The idea is to create a PLC module that can handle 4,6 or 8 PWM channels with 12/24V and up to 3A. I know from testing of MC4X15A that this is very doable as soon as I solve the current sensor on the channels. The usage here is…
I just realized that my math around INA210 current sensing is wrong. I have dimensioned based on 15A design which is the average I expect from all 4 channels driving a single motor. Basically the input current. But, output current on a phase will be based on PWM. And if you use 50% duty you…
I have collected a few power MOSFET samples that I will be testing in due time. It exist other MOSFET’s, but these are selected due to a combination of package, cost and performance that make them interesting. IRFS3107 various packages and is rated 75V @ 160A. It is actually rated 195-230A, but looking at the…
Not so much to write home about, but adding the heat sink back on I turned it up to 5A on a single channel – no heat noticed. My new loads do their job consuming some 100W, but my 5A PSU reached it’s limit. This was 20% duty cycle, so actual phase current was 25A.…
I have removed the heat-sink on the pcture above and is testing on the one good channel I had left. Just using my fingers on the MOSFET’s I get to 3A without heat-sink. This is very promissing and indicate that I have suffered a bit bad numbers from bad MOSFET’s.