DRV8844: pwm duty cycle
Part Number:DRV8844Hi is there a minimum duty cycle for the part?thanks
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BOOSTXL-DRV8323RS: BOOSTXL-DRV8323RS Input capacitors
Part Number:BOOSTXL-DRV8323RSHiI am using the DRV8323RS in a current design and use the BOOSTXL-DRV8323RX as reference design. I think the connection of the input capacitors C1, C2&C3 is a bit...
View ArticleDRV8303: Brushless motor acoustic commutation "tick" root cause and workaround
Part Number:DRV8303Hello, this is a general question in relation to commutation of 3 phase permanent magnet brushless motors.When commutating using the traditional 6 step square wave method, an...
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DRV8837EVM: DRV8837 PWM problem
Part Number:DRV8837EVMIN1 : PWM duty 80%, IN2 : PWM duty 0% / 400hzWhy is the IN2 and OUT2 different??I think the back EMF is a problem... right?
View ArticleDRV8302: Guidelines on setting Vsense.
Part Number:DRV8302I could not find specific instructions for setting Vsense in the datasheet. I am reviewing a design that uses a 5.36K/1K resistive divider between control voltage and ground to set...
View ArticleUC2625: Speed Control with TACH-OUT
Part Number:UC2625I'm looking to implement a form of speed control using the TACH-OUT pin of the UC2625. With an RC filter on the tach output, we would have the average voltage (aka motor speed) and...
View ArticleLMD18200: Bypass capacitance
Part Number:LMD18200We are developing a control board with LMD18200 motor driver for a welding equipment application [wire feeder]. The equipment as two functional operative work. In the first one the...
View ArticleDRV8821: DRV8821 Web page says "Three-Bit Winding Current Control Allows up...
Part Number:DRV8821I'm trying to work out a problem on the DRV8821 and just read under the features column "Three-Bit Winding Current Control Allows up to Eight Current Levels" is this wrong? I know...
View ArticleDRV8302: DRV8302 nFault issue
Part Number:DRV8302Hello all,A professor ask," I’m' working on the development of a BLDC motor driver and I'm using the DRV8302 as a gate driver. I dimensioned all of the external components according...
View ArticleMotor Decay
Hi After the yellow circle, the current waveform becomes somewhat flat (see below), Under load how is the area effected, is this the normal for fixed...
View ArticleDRV8872-Q1: Rds_on vs Iout worst characteristics
Part Number:DRV8872-Q1Hi support team,In order to identify the worst conditions under their use conditions, out customer would like the following data.1. Rds_on vs Iout Graph worst condition2. RDS(on)...
View ArticleBOOSTXL-DRV8305EVM: When should I be running Lab 5b) ?
Part Number:BOOSTXL-DRV8305EVMHi,I am just getting started with lab5b) after ID ing my motor and after experimenting with Kp values and understanding a limit to my Kp based on the high freq noise, in...
View ArticleDRV8824: V3P3OUT capacitance
Part Number:DRV8824Hello,Our customer use the DRV8824, have a question about V3P3OUT capacitance.TI recommend to connect the capacitance as 0.47uF between V3P3OUT and GND.The customer want to connect a...
View ArticleDRV8886AT: Auto Tune Ripple Control
Part Number:DRV8886ATHello,Our customer use the DRV8886AT, have some questions about Auto Tune Ripple Control.Could you tell me the level of IVALLEY?I think that IVALLEY is xx% less than ITRIP. The...
View ArticleDRV8711: need help to plot winding current
Part Number:DRV8711Hi ,1) Where should I connect my Oscilloscope probe to get the wave foam for winding current ? 2) I am not getting a smooth and fine wave foam when connect to the sensing resistor...
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DRV8834: DRV8834 drive unipolar and bipolar step motor
Part Number:DRV8834Dears, My customer want to use drv8834 to drive 2-phase bipolar and unipolar step motor.Because they want use the same PCB at different appication.I know DRV8834 can drive...
View ArticleDRV10983: EVM GUI, difference in RPM between Motor Speed values
Part Number:DRV10983Hi,I am using the DRV10983 to drive a motor. I did some RPM measurements (using different loads and speeds) with the DRV10983 EVM GUI and a separate laser RPM measurement system.The...
View ArticleDRV8884: Quad level input
Part Number:DRV8884Hello,Our customer use the DRV8884.The customer apply voltage to Decay pin.Perhaps, there are three threshold voltage at Decay pin.Vth1: between Vi1 and Vi2Vth2: between Vi2 and...
View ArticleDRV 91680application, current testing should be how to set
(Please visit the site to view this file)data01=SPI_Read(DRV91680_Reg08); //DSAGain[0.1]=00, DAC2DSAInput ,D7=1;SPI_Write(DRV91680_Reg08 , ((data01 && 0x78) || 0x87)) ; // DSARefSel Addr8...
View ArticleDRV8872-Q1: nFAULT timing under OCP and TSD
Part Number:DRV8872-Q1Hi,I would like to know correct timing of nFAULT under OCP and TSD.1. OCPIf the output current exceeds Iocp for 2 us (tOCP), the driver should turn off, but will there be delay...
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