DRV8870 EVM Schematics
Hello,Could you please share the DRV8870EVM schematics?I couldn't find the DRV8870EVM scehmatics in the User Guide.Best Regards,Ryuji Asaka
View ArticleRE: DRV8305 operated at 6V possible?
Weinan, The device will work at that lower VM as 6V. The predriver output voltage will be lower than in normal condition but still able to turn on the standard MOSFETs. The question is during motor...
View ArticleDRV8305 operated at 6V possible?
Hello,1. I am currently feeding the driver with 6V, but nFault pin is indicating warning signals (repeating 56 us pulse low followed by a 56 us pulse high). I read from the SPI bus to know that...
View ArticleRE: Search for a stepper motor driver.
Hi Jerry, There are limited options with these features. Examples are: The DRV8711 with external FETs has this ability. The DRV8881E does not have the SPI interface and requires a mcu to control the...
View ArticleSearch for a stepper motor driver.
Hi,The desired specification is as below:1.The operating voltage range:9-36VDC;2.1A peak current;3.with SPI or IIC interface,including enable and direction control pin respectively;4.up to 1/128...
View ArticleRE: DRV8711 doesn`t start
Hi Pavlin, Please disconnect the motor, power the board and check the following: SLEEPn is a logic high and RESET is a logic low All faults are cleared ENBL bit is set to a 1 At this point the AOUT1...
View ArticleDRV8711 doesn`t start
Greatings! I`m using DRV8711 for a very first time. So I setup the driver:CTRL: 0x0019 // ENBL bit set, 8 step modeOFF: 0x001C // 15usTORQUE: 0x0196 // 150 in TORQUEDECAY: default DRIVE: 0x05A4 //...
View ArticleRE: Supply Voltage and Current for DRV8308
Hi Charlie, Thank you for the information. 1.1 Ohm's is would indicate that something is shorted on the EVM. Before we move anything on the board, are the standoffs installed on the four corners of the...
View ArticleRE: DRV10983 - Abnormal Kt lock reset
Hi Denise, Our experts have been notified and should reply soon.
View ArticleDRV10983 - Abnormal Kt lock reset
Hi,I am using DRV10983 to drive a 3W BLDC motor (kt=14.6 mV/Hz, R=4.95ohm) at around 2400 rpm.The system is working well when there are no faults.Recently I have started simulating some fault...
View ArticleRE: DRV8832
Hi Hirata-san, The DRV8832 requires a power cycle to clear the OCP. The time of the power cycle will depend on the bulk cap. The DRV8830 with an I2C interface can be clear the OCP using the CLEAR bit.
View ArticleRE: DRV8711 doesn`t start
Hi! Sleepn is in logic high(5V), Reset-> logic low. All faults cleared, ENBL=1. In this case I don`t have VM on any OUT pin! Is there anything else? Thanks!
View ArticleRE: Supply Voltage and Current for DRV8308
Hi Phil,Standoffs were installed but not screwed to a conductive surface.P1 pins do not appear to be shorted on the back of the board -- R = 1.1 OhmC1 pins di not appear to be shorted on the back of...
View ArticleRE: DRV8711 doesn`t respond on spi
Hi Pavlin, Sorry for the delayed response. Yes, this is the correct value for the default. The extra one is due to the device enabling the SDATO for a read operation. Once the first one is clocked, it...
View ArticleDRV8711 doesn`t respond on spi
Greatings! I`m using DRV8711 for very first time! I`ve powered the driver with 12V and I`m using dsPIC30F5015(5Vcc) as a microcontroller. Reset pin is connected to GND and SLEEPn to Vcc(5V) as the...
View ArticleRE: Supply Voltage and Current for DRV8308
Hi Charlie, Did you notice any of the other components getting warm on the board? Based on your findings above, can you try to carefully remove the zener diode D6 from the board? This component is...
View ArticleRE: DRV8711 doesn`t start
Hi Pavlin,There are a few more items to check.Please check and report the voltages on V5, VINT, and VCP before and after the previously described steps.Also, if you have a pullup on the FAULTn pin,...
View ArticleRE: Dc fan precise speed control
Ty for the response,I was planing on using a DC PC fan with 3 wires, measuring the RPM with the tacho output , puting in a pid control loop and then controlling the speed trought a mosfet.I'm...
View ArticleDc fan precise speed control
Hello,What would be the best way to precisely hold a dc fan (5v pc fan brushless motor) speed locked at a set speed? The speed would be controlled with a arm development board (Teensey).I need to blow...
View ArticleRE: DRV8305 operated at 6V possible?
Hello Wilson,Thank you very much for your quick reply.As I understood about the specs. of the driver, it should work properly even if it is supplied with 4.4V. I did try with 6V, and my motor seems to...
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