RE: DRV8303 control register1 resets automatically after configuring it...
Hi Jeeva, Your description is indicating the SPI has been reset. There are a few items to check. Are you writing to Control Register 2 also? Is it being reset? Is there some method that you can use to...
View ArticleDRV8303's PWM output getting affected by mounting MOSFETs on our boards
We a trying to drive a stepper motor using DRV8303. We are interfacing and configuring the DRV IC using micro controller. We have configured DRV8303 in 3 PWM mode. We checked the MCU output for PWM and...
View ArticleRE: DRV8303's PWM output getting affected by mounting MOSFETs on our boards
Hi Jeeva, Is this the same board as the previous post? If so, would you mind if I merge the threads? Have you looked at the PVDD voltage?
View ArticleRE: DRV8303's PWM output getting affected by mounting MOSFETs on our boards
Hi Rick,Yes its the same board as the previous one. You can merge it to the previous Thread. We measured the PVDD and its values is 24V as expected and VDD_SPI is 3.3V. We made one more observation on...
View ArticleRE: about DRV8412-C2-KIT Hardware Reference Guide Hardware resource mapping
Hi Nemenem, Thank you for pointing this out. The schematic is correct. Sorry for the confusion.
View Articleabout DRV8412-C2-KIT Hardware Reference Guide Hardware resource mapping
Hi;We have DRV8412-C2-KIT.I checked Hardware Reference Guide p.9 and see that Current sense phases A to D are inconsistent with schematics.Which one is true ? Regards
View ArticleRE: Looking for Micro-controller/driver for a 1 A, 5 V, BLDC
Stefan,Have you looked at the DRV10970? It has the driver circuitry and the motor control state machine both on one device, so should be easy to use to spin a motor under 5A / 1A. It does not have any...
View ArticleLooking for Micro-controller/driver for a 1 A, 5 V, BLDC
Hi,I am looking for an micro-controller (possibly with embedded driver circuitry) for current/torque control of a brush-less DC motor. This controller should be able to utilize SPI or I2C interface,...
View ArticleRE: DRV 8825 EVM USB Opcode for DIR
Hi Rick It appears that the USP Opcode to set/unset P4.4 is what I need. Let me approach my problem from a different direction. The DRV8824-25 tab on the Windows GUI app has a 'window' with check boxes...
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RE: DRV 8825 EVM USB Opcode for DIR
Hi Ralph,Once the GUI is communicating with the EVM, there are two methods to set/reset DIR.You can select the Motor Direction, Forward or Reverse button or you can click the DIR pin. Either will...
View ArticleRE: DRV 8825 EVM USB Opcode for DIR
Hi Rick. OK.I will try a sniffer. I have been going through the source code and can't find it. I believe I will find how it is implemented in Task0.cpp. Case(MICRO_STEP_8812) has MS_Direction which...
View ArticleRE: DRV120 ROSC resistor change
Marcel,Thank you for sending me this detailed information. I plan to go to the lab tomorrow morning to do some tests with the DRV120.James
View ArticleRE: DRV8711 Updating the TORQUE register 0x01h
Hi Guy, The DRV8711 will respond to the change in the TORQUE register immediately. The delay can be caused by the motor inductance and the system voltage. Can you try modifying the TORQUE register at a...
View ArticleDRV8711 Updating the TORQUE register 0x01h
All,I'm using the DRV8711 in an indexing mode within a 250Hz servo loop. All is working as expected when I preset the TORQUE setting (reg 0x01h <b7:b0>, but leave it at that setting. I am...
View ArticleRE: DRV10970 - Sinusoidal output & speed variability
Thanks for the clarification Dave. DRV10970 controls the peak of the applied sine voltage or peak of trapezoidal voltage. Yes peak is same between two drive scheme but RMS voltage is not same....
View ArticleRE: TPL7407L - Ccom
Wilson san,Thank you for your reply always!How much of a bigger bulk cap is fitable in case of unipolar stepping with 150mA(RMS)?(22uF upto 47uF?)Does it depend on situation?Kind regards,Hirotaka...
View ArticleTPL7407L - Ccom
Hi allWould you mind if we ask TPL7407L?On the datasheet P9 shows that Ccom is 0.1uF.We guess that this is to reduce noize, why is 0.1uF used for?And if it has some formula to caluculate, could you...
View ArticlePlease help me solve the question about SVPWM codes
Dear friend I am reading SVPWM codes in the mortoware, but I can't find the code determining the sector of the synthetic voltage . Please tell me the way to judge the sector of the synthetic...
View ArticleA question about SVPWM code on 28027
SVPWM code is as follows, how to know the sector of the reference vector ;static inline void SVGEN_run(SVGEN_Handle handle,const MATH_vec2 *pVab,MATH_vec3 *pT){_iq Vmax,Vmin,Vcom; _iq Va,Vb,Vc; _iq...
View ArticleRE: DRV8303 control register1 resets automatically after configuring it...
Hello Rick,Thank you for swooping in to help us out. And sorry about the mixup in posts. As a response to the points raised by you,1) We have checked for PVDD undervoltage. We don't notice any PVDD...
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