RE: DRV8837: Parallel Motor Connected
Hi Pavaman, Sorry, I am confused about the diagram and prior discussion. The max voltage of the DRV8832 is 6.8V, but you said VM could be as high as 30V. As shown, the motors will only run in one...
View ArticleRE: DRV8305-Q1: DRV83055-Q1 operational temperature/ current amp
Hi Jeremy,1.) Operational TemperatureThe recommended method for estimating the die junction temperature in our devices is:Tjunc = Tcase + (ψJT x Power)In this estimation, the ψJT value can be found in...
View ArticleRE: DRV8307EVM: DRV8307EVM Input voltage noise
Hi eb1984, What kind of ceramic bypass capacitance is on the 24V rail? I would recommend including a small .1 uF ceramic capacitor on each of the three half bridges as well as on the VM pin of the...
View ArticleClik here to view.
DRV8307EVM: DRV8307EVM Input voltage noise
Part Number: DRV8307EVMHi,I am driving a 3-phase bldc motor with drv8307evm board. When i change the pwm duty cycle, there exists a voltage noise on 24V DC input voltage. How can i terminate it? By the...
View ArticleClik here to view.
RE: DRV8303: Problem about SPI with C2000 mcu
Hello Rick Duncan,Thank you for your reply.This problem was solved.We could run SPI communication normally between C2000 mcu and Drv8303.The attached figure is the scope of the SPI signals,yellow means...
View ArticleStepper motor driver IC Select
Hi team,The customer needs to select the stepper motor driver IC to drive the unipolar and bipolar stepper motors for the printer domain.The power supply is 12Vor24V. The output current is needed to...
View ArticleRE: DRV8301: DRV8301 GVDD is always LOW
Hi Rick, Thanks for your reply,Yes, powerPAD is connected to ground.And EN_GATE is logic high before starting with anything and I wait for 20 msec after EN_GATE is high.AVDD = 6.3VDVDD = 2.7VGVDD...
View ArticleDRV8800: the maximum fPWM for Logic input PWM frequency(Enable)
Part Number: DRV8800Hi allWould you mind if we ask DRV8800?How much is the maximum fPWM for Logic input PWM frequency(Enable)?Less than 50kHz?Kind regards,Hirotaka Matsumoto
View ArticleRE: DRV8301: DRV8301 GVDD is always LOW
Hi Rick,I just manually connected ground pin to EN_BUCK (pin 55 of DRV8301 IC) and PWM is suddenly working. Prior to connecting EN_BUCK to ground its voltage was 2.7V. But just as I ground EN_BUCK PWM...
View ArticleClik here to view.
KA3100D - Fairchild IC 1:1 Alternative
We are using Fairchild Semiconductor KA3100D IC SOP-16 SMD Package in our medical products with annual consumption of 1000. Currently this IC is EOL now (Year 2008)But since it is used in regular...
View ArticleRE: KA3100D - Fairchild IC 1:1 Alternative
Hi Vaibhav, There does not appear to be a 1:1 compatible device. The closest matches are the DRV8834 and DRV8836.
View ArticleClik here to view.
RE: DRV8307EVM: DRV8307EVM Input voltage noise
Hi,My whole schematic is below, can you show me on which points i must add 100nF capacitors?
View ArticleRE: DRV8301: DRV8301 GVDD is always LOW
Hi Suraj, Q1: I'm keeping EN_BUCK to 0V for now but what should be its value ideally? Ideally, the EN_BUCK should be floating if the buck is enabled. The 22uH inductor should be connected. Q2: Also I'm...
View ArticleRE: Stepper motor driver IC Select
Hi Mickey, Output current of 3A limits the options available. Please check if 2.5A will work. What level of microstepping is desired? When using unipolar, what is the desired configuration to...
View ArticleRE: DRV8800: the maximum fPWM for Logic input PWM frequency(Enable)
Hi Matsumoto-san, The recommended maximum is 100kHz.
View ArticleClik here to view.
RE: DRV8307EVM: DRV8307EVM Input voltage noise
Hi eb1984,I added red 100 nF capacitors from VIN to GROUND on each of your MOSFETs below.Do you have an large bulk capacitors on the VIN net? I would recommend at least 220 uF on this net.
View ArticleClik here to view.
RE: DRV8307EVM: DRV8307EVM Input voltage noise
Hi,My power supply circuit is below, there is 680uF/50V capacitor and a 24V TVS diode. By the way the same transients exist on 3V3 DC net, so the mcu is affected and stops working. I can not understand...
View ArticleClik here to view.
DRV8303: DRV8303 Flow Through Drive of High and Low Side FETs
Part Number: DRV8303We are using theTMS320F28069MPZT and the DRV8303 and have a problem with the GLx (lower gate output drive) spiking up when there is a transition on the GHx signal (high side gate...
View ArticleRE: DRV8835: Does DRV8835DSSR requires diodes to protect motor's inductive...
Hi David, There is no need to add external diodes to xOUT1/2. The high side and low side FETs contain a diode as shown in the block diagram.
View ArticleClik here to view.
DRV8835: Does DRV8835DSSR requires diodes to protect motor's inductive spiking?
Part Number: DRV8835Hi, I have to control 2 brushed DC motor using DRV8835DSSR.According to the datasheet, I don't see diodes inside except the diode mark at each NFET and PFET.As far as I know, the DC...
View Article