Tool/software:
Hello,
Can you help us understand how to calculate the base current on the MCF8329A?
The data sheet isn't very clear.
Thank you, Keith
Tool/software:
Dears,
As shown in the attachment, there is an oscillation observed in the Iout waveform.
Do you have any advice or suggestions regarding this oscillation?
The circuit was designed according to the EVM board.
And when the load is small, the VOUT waveform appears as a triangular wave. Is this normal?
Thank you.
Tool/software:
Hi,
I am planning to build a 150W BLDC Motor controller, Kindly suggest me any suitable motor controller IC for my application.
Input Voltage : 150-300VAC
Input Power : 50-150W
Tool/software:
Hello,
we have compared the 1-PWM Mode to the 3-PWM Mode with FOC. The 3-PWM Mode with FOC was used with the Evalkit DRV8353H-EVM (Hardware Configuration, NOT SPI).
The are driving a BLDC Pump with this setup. With the 3-PWM Mode with FOC the pump required about 5.5A Peak Current on each phase at 48V to run at full capacity. When we use the 1-PWM Mode with directly fed back HALL-Sensor output to the DRV Inputs, we get peak currents of roughly 10A at 48V.
This mode shows significant inefficiency with our setup. The load remains the same for both scenarios.
Is there an explanation for this? We are aware that the sine wave running on a FOC-commutated design will always be more efficient, however it does not explain a 2-time increase between the two setups.
We also noticed that the SOx Output is highly disturbed by noise. This noise corresponds to the PWM frequency. The measurement input on SPx/SNx does not show this noise. It is a product of the IC. How can this effectively be counteracted?
Best regards,
Tool/software:
hi team
I have a question about creepage distance on DRV8350, I search the forum and find a similar question ， but I can not see the result， would you please give me the answer ，thank you！ the question is as follow：
DRV8353SR.
According to IPC2221, this results in class 100V difference and requires 0.5mm creepage distance between pins 13 and 14.
The pin pitch for this device is 0.5mm, but the layout footprint is of course less than pin pitch. It is 0.21mm and so much less than the required 0.5mm
Am I missing something or do they have a problem?
What standards do our devices fulfill in this regard?
Is IPC2221 too stringent?
Tool/software:
Hello team,
Is it possible for the DRV8706-Q1/DRV8106-Q1 to transition from Inactive State/Sleep State to Operating state directly?
What we are caring about is the transition time; tWAKE.
If the driver needs to transition from Inactive/Sleep state to Operating state via Standby state, tWAKE is needed at least.
If the driver can transition from Inactive/Sleep state to Operating state directly, how to consider the delay?
Regards,
Hirata
Tool/software:
Hi team,
1. May I ask if any RC filter need to be added to the VDARIN pin? If yes, do you have any recommended value?
2. May I know what the VTH value is when the motor output is shorted to the power supply?
Thanks in advance！
Regards,
Ivy
Tool/software:
Hi team,
What is output voltage of "GHx, SHx, GLx, and SLx" during DVDD open failure event?
Pin FMEA just says "Device external digital power supply missing, device non-operational" but not mention these voltage.
Regards,
Ochi
Tool/software:
What could be the possible reasons for Vdd pin and Gnd pins to get shorted?
Tool/software:
Hi,
Currently, when we are demonstrating the functions of ULC to customers, the customer took toilet paper to simulate dirt.
During the demonstration, I only saw the water bounce off, but it could not completely fall off.
The client is asking, if this situation occurs, how much energy is required, or what should be done to get rid of it?
Thanks & best regards,
Tool/software:
A customer is interested in the DRV8161 half-bridge gate driver as part of an isolated LLC power stage. The additional flexibility of the Smart Gate driver allows for some slew-rate optimization that would be useful.
The datasheet doesn't indicate a maximum PWM frequency, but the timing data looks promising.
Any thoughts on using this device in an LLC power supply topology?
Thanks!
-Steve
Tool/software:
Tool/software:
Hello - I'm designing a non-standard, 2W inductive power system that will operate in the 100-1000kHz range. I'll probably used a fixed frequency and adjust the supply voltage (VM) to adjust the output power.
The DRV8212 and similar parts seem like a nice compact solution for driving the inductive transmit coil.
Do you have any advice on potential issues and pitfalls with driving an inductive coil with the DRV821x?
Thanks!
Tool/software:
Is it possible to use the DRV3946-Q1 in a 24V system?
The input supply to the device could be provided from a 12V rail, but the OUT1, OUT2 input voltages could be as high as 40V (absolute max). Is that a problem?
Tool/software:
Hello,
I am using MCT8316Z for BLDC control and inspecting the car. When the car works normally on flat and uphill roads, it moves steadily forward.
When the car is going downhill and needs to use the brake, it will shake and cannot be stably controlled to stop. Is there any recommended solution to achieve downhill speed control and braking?
thank you!
Tool/software:
We find there are air bubble fault when we running the X-ray test for part# LMD18200-2D/883, we want to confirm the exactly sealing width value of the part deigning drawing. Perhaps anyone could provide the screen test report or qualification report ? Any profile will be helpful as soon as it shows the value and data about the sealing width value, we need to know the impact of airtightness on device usage. Thanks
Tool/software:
Hi,
I am planning to use the DRV8311P in a very small product. The PCB is roughly 10mm x 20mm.
We have 120mA load @ 3V3 so we are using a small DC/DC (the TLVM365R15) instead of the internal LDO to provide system 3V3. This will also help keep the heat dissipation down.
In the datasheet SLVSFN2B Revision B, on pages 5 & 6 it advises the de-coupling capacitor requirements for VIN_AVDD and AVDD.
N.B I plan to use 10-20uF on the VM pin
As our board needs to be so tiny I want to use the minimum de-coupling necessary. However, as we are not loading the internal LDO externally I'd
like to know what the minimum de-coupling is recommended for VIN_AVDD and AVDD.
As per the images below the datasheet states the LDO is also used for digital logic and there is also another LDO used for the Pre-Driver (presumably not 3V3?)
Based on the spec for the maximum external load when 2.5 < VIN_AVDD < 3.6 being 10mA I assume the internal load is less than this which allows me to use 1uF on AVDD.
Nowhere does it state what the internal 3V3 digital load actually is...
Now for VIN_AVDD all it states is 10uF and that seems(guessing) to be irrespective if you are externally loading the LDO or not. Our VIN_AVDD could be connected to the output
of our 3V3 DC/DC OR it could be connected to VM. If connected to VM it will generate a little more heat but again this depends on that internal digital load current which is unknown.
If I connect it to the DC/DC 3V3 then it will not regulate and it looks like the LDO would put out ~3V. This may have impacts on the digital logic it supplies so may not be a good idea.
On top of this of course is what de-coupling cap is necessary for VIN_AVDD.
Hope someone can help, this is a complex one.
Thanks, Shane
Tool/software:
Hi MD Team -
Is the DRV8305 gate drive current capabilities (sink, source) able to drive my current application profile (FET in saturation mode) without any issue?
Do you see any issue to drive my application profile using DRV8305? Thanks!
Voltage Range : 9V to 16V (12V typ)
Ambient : -40deg to 125deg
FET : IAUC100N04S6N015
Gate Resistance: Assume to be direct drive without gate resistance.
BLDC Frequency : 20 kHz
Profile :
1) 16Arms continuous
2) See below waveform
Tool/software:
Hi team,
Would you please help share the dynamic thermal impedance curve of DRV8908-Q1? Thanks
Scarlett
Tool/software:
Hello Expert,
Do you mind helping to check the schematic and layout attached?
e2e.ti.com/.../_EA81056E016D719AA852_.pdf
e2e.ti.com/.../MSP430F5510_2B00_ULC1001_2B00_drv2901.DSN
Best regards,
Wenting