RE: DRV8432 About application diagram example in datasheet
Hi Shimizu, Our expert will be noticed and get back to you later. Best regards,
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DRV8432 About application diagram example in datasheet
Hi,Could you let me know the mean of 1ohm resistor at GND pin, please?Best regards,Shimizu
View ArticleRE: DRV8432 Over current protection deglitch time
Hi Shimizu, The 250ns is just the deglitch time, similar to the Tblanking time we said in other DRV8x devices. Best regards,
View ArticleDRV8432 Over current protection deglitch time
Hi,Could you let me know over current protection deglitch time, please? There is overcurrent response time (250ns) in datasheet. But I think that this is time from short condition to Hi-Z ofFET. In...
View ArticleDRV8302 Fault pin always zero
Dear Friends,I have used DRV8302, as an MOSFET Driver, in my design for BLDC Motor Control Board. I have a problem, DRV8302 Fault pin always zero. can you give me some advice...
View ArticleRE: Isolating two DRV8711 for redundancy
Hi Nathan, Can you provide a little more information? When one board is back feeding VM through the body diodes of the power FETs, what problem(s) are you experiencing? We will investigate and reply soon.
View ArticleRE: Isolating two DRV8711 for redundancy
The node connected to VM is also used as the input voltage to lower voltage power supplies, which try to turn on, which in turn try to turn on other chips that they power. The unpowered board becomes...
View ArticleRE: Adapting the DRV8305N BoosterPack Eval Module for low-speed and with Hall...
the hall sensors for motor commutation are all the same essentially you can see an example in controlSUITE C:\ti\controlSUITE\development_kits\DRV8312-C2-KIT_v128\BLDC_Sensored if you are wanting to...
View ArticleAdapting the DRV8305N BoosterPack Eval Module for low-speed and with Hall...
Folks,I would like to implement a low-cost BLDC motor controller for mechatronics/robotics applications that combines the capabilities of the DRV8305N BoosterPack Eval Module with low-speed (down to...
View ArticleRE: Any TO-220 MOSFET(Max Vds >60V Id>60A ) recommended for DRV8301?
Hi Frank, Can you confirm the gate drive average current is below 30mA RMS? Please refer to section 8.2.2.1 Gate Drive Average Current Load of the datasheet for the equation?
View ArticleRE: DRV8711 high temperature
Hi Thorsten, We will investigate and reply soon. While waiting there are a couple of documents to review in case you missed them. They are listed at the end of the datasheet:DRV8711 Decay Mode Setting...
View ArticleDRV8711 high temperature
I'm using the DRV8711 with IRLR2905Z Mosfets at 42V/4,0Arms. The board dimensions are 71*77mm, 4 layer using large GND copper planes.After adding series resistors to the lowside FETs the boards work OK...
View ArticleRE: DRV8302 Fault pin always zero
Hi Umit, The schematic appears to be good. Please measure and report the voltages of the following pins when nFAULT is low: 1) PVDD 2) GVDD 3) AVDD 4) DVDD 5) EN_GATE 6) M_PWM 7) INL_x and INH_x 8)...
View ArticleRE: Isolating two DRV8711 for redundancy
Hi Nathan, Thanks for the clarification. If the control logic remains unpowered, would that solve the problem? If so, your main supply on one board could be split into two rails. One rail would power...
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Isolating two DRV8711 for redundancy
I am working on a design that requires redundant motor driver circuits. One circuit will be energized (driving a stepper motor with 24V) while the other is not. This second circuit is located on a...
View ArticleRE: [ DRV8303 ] Bootstrap Diode Characteristics
Hi Ken, Here are our specifications of the internal bootstrap diode: Forward voltage VF @ IF=0.5 mA: typ: 0.676 V, max:0.85 V Forward current IF @ VF=1 V: min: 100 mA, typ: 500 mA; max:1600 mA Diode...
View ArticleRE: [ DRV8303 ] Bootstrap Diode Characteristics
Hi Phil,Thank you for sharing information!You don't have intention to specify this in the datasheet, correct?MinTypMaxUnitForward Voltage VfIF=0.5mA0.6760.85VForward Current IfVf=1V1005001600mADiode...
View ArticleRE: Any TO-220 MOSFET(Max Vds >60V Id>60A ) recommended for DRV8301?
The Typ Qg = 75nC, the Max Qq is not listed, suppose the Max Qg for STP80NF70 is 300nC. Then we have 14.4ma = 300nC x 6 x 8Khz.I have lower down the PWM freq to 8K, and increase drive peak current to...
View ArticleAny TO-220 MOSFET(Max Vds >60V Id>60A ) recommended for DRV8301?
hi, I am doing a DRV8301 design and using ST STP80NF70 as MOSFET, my circuit is similar with BOOSTXL-DRV8301, but the VGDD is good before RUN is activated but failed and is down to gnd after the PWM...
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RE: DRV8305 Damage
I closed all fault and than motor spinning. No damage, no high temperature on DRV8305.But 12A current draw mosfets from the power supply and PVDD about 8VPhase signals as shown captures.Bad signal on...
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