RE: TPL7407L - Some questions
Hello Matsumoto-san,1. This diode is used to increase the discharge voltage of the inductor coil. The zener reverse breakdown voltage can be whatever you choose. Around 5V or 12V is appropriate.2. Yes,...
View ArticleRE: DRV10970 - Sinusoidal output & speed variability
Hi Dave,Can you make sure that changes highlighted in section 9 Changes in EVM for Inverted Hall Signals in EVM userguide is followed Current waveform doesn't look right, it is neither sine nor...
View ArticleRE: Series Capacitor on Output to Inductive Load on DRV 8800
Hi Mike, You are trying to stay away from the overcurrent circuit and overcurrent deglitch time. Overcurrent is minimum 3A and overcurrent deglitch is typically 3us. For your case, it is suggested to...
View ArticleSeries Capacitor on Output to Inductive Load on DRV 8800
I have read all of the datasheets and technical notes regarding this motor driver and I can't seem to find anything regarding this specific application.I want to put a bipolar capacitor in series with...
View ArticleRE: TPL7407L - Some questions
Micheal sanThank you for your prompt reply!Our customer uses the zener which reverse breakdown voltage is 20V.We guess that this is big, right?Kind regards,Hirotaka Matsumoto
View ArticleTPL7407L - Some questions
Hi all,Would you mind if we ask TPL7407L?<Question1>On the datasheet P11, there is optional diode between VSUP and COM.How much of rated voltage's diode should we use?<Question2>On the...
View ArticleRE: TPL7407L - with unipolar stepping motor
Hi Hirotaka, This should because of the current recirculation caused by the other half of the coil happend just when Ib driving finished. It is normal. Best regards,
View ArticleRE: TPL7407L - with unipolar stepping motor
Wilson sanOK, we got it.Kind regards,Hirotaka Matsumoto
View ArticleTPL7407L - with unipolar stepping motor
Hi allWould you mind if we ask TPL7407L?Please refer to the following file.[View:/cfs-file/__key/communityserver-discussions-components-files/38/20160707_5F00_TPL7407L.pdf:1230:0]Could you give us some...
View ArticleRE: DRV8846 Unnecessary Radiation Noise
Hi Rick-san,Thank you for your strong support.This issue have been closed.Best regards,Kato
View ArticleDRV8846 Unnecessary Radiation Noise
Hi,Could you please tell us how to suppress any unnecessary radiation noise more than 100 MHz which DRV8846 generates ?For instance, it can be suppressed if connecting the capacitances of 1nF between...
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RE: DRV10970 - Sinusoidal output & speed variability
Changes in section 9 have been made, yes. Hall sensors are connected to negative side inputs, and positive side inputs are referenced to 2.5V. Changing bus voltage of the motor does not affect the...
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DRV10970 - Sinusoidal output & speed variability
I am working to develop a BLDC motor driver. The selected motor is a Faulhaber 2622, 6V version, datasheet attached. I'm using the DRV10970 eval board and have configured the board properly such that...
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RE: DRV8711 Register Optimization
Hi ErnestHankI did some test today and just want to share some basic tuning of stall detection. All included in the following picture.So the whole C interval is the zero step. Section A is because of...
View ArticleRE: Minimum controllable rpm with DRV11873
Hi Tjorven, Our experts have been notified and should reply soon.
View ArticleMinimum controllable rpm with DRV11873
Dear,I am using the DRV11873 to control a small Faulhaber 1509T006 brushless DC motor. I have built the schematic of section 9.2 in the datasheet and since the motor does not have a COM pin, I have...
View ArticleRE: TPL7407L - Vcom belos 0.5 V/us and Absolute Maximum Ratings
Hello Matsumoto-san, 1. While it is possible that the device could fail under these conditions the exact failure mechanism of the device could depend on the exact conditions and therefore it cannot be...
View ArticleRE: DRV10970 - Sinusoidal output & speed variability
Hi Dave,The Hall signals look good. DRV10970 is spinning motor in sine mode, but due to low inductance of this motor there is distortion in waveform.Can you please explain what makes you think it is...
View ArticleRE: TPL7407L - Vcom belos 0.5 V/us and Absolute Maximum Ratings
Michael sanThank you for your reply!We would like to confirm one point.2. Yes, you are correct that this is spec'ed at 25C. We do not provide the information for the device specification across...
View ArticleRE: HS+LS FET on-resistance of DRV8835
Hi Hirata-san,Please see Figure 4. Typical values for Vcc=3V, VM=5V is plotted across temp there.
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