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DRV8824 EVM board Rsense Voltage abnormal
Dear Sirs:In order to check if Current over criterion,We want to monitor the voltage of RsenseUsing 8824 EVM to monitor ISENA and ISENBWe expect the signal is sine waveBut the signal look...
View ArticleRE: DRV8837 / Input logic low current
Hi Kuramochi This +/-5uA is the current leakage of the input pin in normal mode when external driving voltage is zero. But in SLEEP mode, this leakage should be also controlled. So the input internally...
View ArticleDRV8837 / Input logic low current
Hi,The input logic low current is defined ±5uA(maz) on the datasheet.However this value is too large for my customer.(My customer is saying that this value is too larger than sleep current)Is there any...
View ArticleRE: DRV8872goes into current regulation with ISEN grounded.
Hi Rick,I may be able to use this after all. I have enough ADC inputs to monitor the voltage across ISEN. Question? if only one driver in a group is enabled at a time, can I use a common resistor and...
View ArticleRE: DRV8412 strange behaviour
Hi Chris, Please refer to section 7.3.2.1 of the datasheet. It appears the bootstrap capacitor is being depleted. Increasing the bootstrap cap and adding a 5 Ohm series resistor between the 12V supply...
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DRV8412 strange behaviour
Hello,Could anyone explain me this bdrv8412 behaviour?My DRV is in mode (M3 = 0, M2 = 1, M1 = 1) "Dual full bridges, one PWM input each full bridge with complementary PWM on second half bridge"My...
View ArticleRE: DRV8412- 2 Brushed DC Motor and Stepper Motor
Hi, Please take a look at the DRV8870, DRV8871, and DRV8872 for the DC motors. The DRV8880 may be of interest for the stepper. In both cases, the current regulation is controlled by the devices...
View ArticleRE: DRV8412- 2 Brushed DC Motor and Stepper Motor
Rick, Thank you very much for driver options suggestion. My main question is how could i drive two DC brushed motor and one stepper motor using F28035 or F28069 control card? I like to use one control...
View ArticleRE: DRV8872goes into current regulation with ISEN grounded.
Hi Steve, In theory, this might work. One item to consider is the variation in trace resistance on the board. Depending on the resistor value used, this may matter.
View ArticleRE: DRV590 vs DRV595
Hi, Kai, This is not a typo. The internal architectures are slightly different between the two devices. Is there an issue? Don
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DRV590 vs DRV595
Dear Sir I think IN+ should be directed to internal OPA+ Could you kindly help to check have something wrong in DRV595??
View ArticleRE: DRV8872goes into current regulation with ISEN grounded.
Hi Rick, I have been experimenting with the motor and it looks like 1.8 ohms is a good value. The drive doesn't go into regulation mode and I can detect my soft stall at ~ 150mv. I have 8 motors that...
View ArticleRE: DRV8850 LDO resistor divider current
Hi Dave, Our design team said that a resistor divider consuming 10uA is a good choice. This should maintain accurate regulation.
View ArticleDRV8850 LDO resistor divider current
Hi,I am designing a circuit using the DRV8850, and I would like to use the LDO to power the MCU in my circuit.I am happy with the 40uA quiescent current in the regulator, but I would also like to...
View ArticleRE: DRV 8332
Hi Vu, Can you provide more details? Do you know what is broken when you perform a fast PWM change? Can you provide a scope capture of the logic signals? Can you provide a scope capture of the PVDD,...
View ArticleDRV 8332
Hi I am using Drv 8332 conected to TIva tm4c123 g kitMy motor can work but sometime when I tried change fast pulse PWM (control speed) , my DRV 8332 and my kit mcu were broken ,so I must buy new one.I...
View ArticleRE: DRV8842 goes too fast in nFAULT conditions after start the Motors movements
Hi Michele, Is it possible to lower the VM voltage? As an experiment lowering the voltage to 24 V should reduce or eliminate overcurrent events.
View ArticleRE: DRV8412- 2 Brushed DC Motor and Stepper Motor
Hi, Most of the driver boards have an on board mcu to communicate with a GUI for ease of evaluation. To control a driver using an external mcu, most boards have either removable resistor packs or jumpers.
View ArticleRE: DRV8825 understanding and Thermal Issue
HiCan we connect DC Motor to DRV8825 Driver IC ? DC Motor Electrical Spec VCC = 5VWinding Res = 1.5OhmsThanksPavaman. P
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