RE: CCS/DRV8305: ESC gets very hot with one motor, but works great with another
Hi Rick. It works well with T-Motor MN5212 or any other hobby motor (340-400KV), but overheats with Dynamite Fuze 1200KV. Try to search on Internet, these sites never work normally. Specs I detect with...
View ArticleCCS/DRV8305: ESC gets very hot with one motor, but works great with another
Part Number: DRV8305Tool/software: Code Composer StudioHi. It's around 2 months we finished our ESC design and are testing it extensively since. Several days ago we tried it with new motor and ESC got...
View ArticleRE: DRV8800: Resistor sizing
Doh. My 7th grade algebra teacher would be disappointed. Thanks.
View ArticleDRV8800: Resistor sizing
Part Number: DRV8800I'm working on implementing the DRV880. I have a question on calculating the Rsense resistor power rating.Rsense = 0.5V/Itrip. Assume Itrip = 1.5A. Rsense = 0.333OhmPRsense = i^2 *...
View ArticleRE: DRV8836: MODE pin
Hello John,The internal resistance for the mode pin as stated in datasheet section 6.5 is 100k ohms. if the pin is left floating the bridge control mode defaults to IN/IN mode.If they want to add the...
View ArticleDRV8836: MODE pin
Part Number: DRV8836The DRV8836’s Mode pin has an internal pull down which puts it into the ‘IN/IN’ mode. What is the resistance value of this internal pull down?I know this is a logic level input but...
View ArticleRE: DRV8825: Irregularities in output waveform
Hello John, Can you please monitor the nFault pin and see if goes low? After reviewing files, the schematics look normal. So remains in question, layout or assembly. Could it be an error with stencil?...
View ArticleRE: DRV8711: Sleep mode and initialization
Hi David, Once the registers are loaded, the registers settings are maintained as the device exits and enters sleep mode. This is assuming VM remains powered when in sleep mode.There is no need to...
View ArticleDRV8711: Sleep mode and initialization
Part Number: DRV8711Based on some traffic here, it seems that when the driver is in an operational state (motor spinning, etc) and SLEEPn is asserted for some time, and then de-asserted, a...
View ArticleRE: DRV595: Getting very hot
Hi Abdul,So the temperature is not very high when the issue occurs, right? Could you please try a simple experiment. Remove all of the connection on the input pins - INN and INP. Just connect the two...
View ArticleRE: DRV3201-Q1: Safety documentation according to ISO 26262
Hi Will, thank you for your fast response (the mail notification went to my spam folder, so my response is a little bit late :-)). I did not receive your PM. Could you please send it again? Regards,...
View ArticleRE: DRV8825: Irregularities in output waveform
Hi Luis,First, answers to your questions:The nFault pin never goes low, nor does the device get very warm.I'm not sure what you mean by "error with stencil". Could you elaborate?The devices are all...
View ArticleRE: CCS/DRV8305: ESC gets very hot with one motor, but works great with another
Hi Roman, Total current consumption does not provide a complete picture. It is important to observe the currents in the motor. Please examine the motor currents during operation. Also, please search...
View ArticleRE: DRV8811: Issue with DRV8811
Hello Adrian, The 54TC is only a part of the device marking. Your marking provided 54TC C7YD is different from the one originally posted, 54TC DLQ8. Although the date is the same there is more...
View ArticleRE: DRV8825: Irregularities in output waveform
Hello John,By error with stencil I mean that there could be some fault with the soldering process that might be worth looking at ,like bridging, solder beading, opened/insufficient solder not...
View ArticleRE: DRV8825: Irregularities in output waveform
Hello Luis,I soldered a 10mm piece of AWG 30 wire from the sense resistors directly to pin 14 on the device and removed the previous ground connection from the sense resistors. The result was a much...
View ArticleRE: DRV8825: Irregularities in output waveform
Hi John, Since you are considering switching to the DRV8880, please take a look at the DRV8886AT also. This device has AutoTune plus integrated current sensing. The recommended maximum voltage range is...
View ArticleRE: DRV10975: Can I use an external H-bridge?
Hi Jeff, Both the pins have same signal on them, they are internally connected to same node on FETs. In order to support rated current, there are 2 pins to reduce temperature. DRV10975 doesn't measure...
View ArticleRE: DRV8825: Irregularities in output waveform
You have answered my questions. I am now confident that the issues I was seeing were due to poor layout in my design as you suggested. I plan to design a single channel prototype with the DRV8886AT...
View ArticleRE: DRV10975: Can I use an external H-bridge?
Is there a chip similar to this, or the DRV11873, that will let me use an external H-bridge? The idea seems so simple that a chip like that must exist.
View Article