Questions tagged [driver]
A chip or a circuit that sends a signal with more current or voltage, or over longer distances.
935
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Unable to control 24 VDC brushed motor with dev boards
I'm designing a board that has to control several DC brushed motors. The motors are SY54E-DC24V-2PCE. I didn't find a datasheet but some references like this and this.
I measured the DC resistance of ...
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WL1837MOD SDIO Control(or Wifi module in general)
There are a number of wifi module which are controlled by SDIO(as an option). I am using the WL1837MOD as a specific example but I welcome more general answers.
All the documentation for this chip ...
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Do PWM Half-Bridge Gate-Drive ICs allow 100% DC?
I read in other questions that is not possible to use 100% DC as PWM input for drivers that use a bootstrap/charge pump to shift the gate levels.
I'm talking about common brush DC motor gate drivers, ...
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How to drive P mosfet gate to ground in half bridge synchronous DC buck/ boost converter
The diagram shows the totem pole driver circuit for the Hi Side P channel Mosfet driven from PIC pin PWM output. This is part of a buck boost circuit running at 250KHz.
The biased totem pole ...
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MIC5891 driver output voltage
I am troubleshooting a relay driving board that uses an MIC5891 to drive a 12VDC relay (86Ω coil). The load supply voltage into the 5891 is 12V. When checking an output with no load I get 12V. When I ...
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Use DC Motor driver for electromagnet
I need to control the force exerted by an electromagnet using an MCU. it's not a commercial item so I don't have any datasheet.
Here what I know:
resistance: 8,9 ohm
may be powered up to 60V (with ...
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Output drive vs. absolute max output current
In many Texas Instruments datasheets (e.g. this one) there are two different stated values for current per output:
Output drive, stated as 4 mA at \$V_{cc}=5 V \$, page 1.
Continuous maximum current ...
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Unsure about bulk capacitor value and type for custom PCB
I'm designing a custom PCB (90x90mm approx) which is using an ESP32 module to drive 5 dual channel H-bridge ICs (DRV8835) which control 9 miniature brushed DC motors (1A stall.)
The datasheet of the ...
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Driving optocoupler by a line receiver
I wanna drive TLP350 by a line receiver AM26LS32. I employed scheme 1, however, there was no signal on output.
I found in line receiver datasheet that the current sign is negative so it is likely to ...
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Define the purpose of these components in the operation of this low side driver
I am trying to understand the operation of the following low side driver circuit I found in a schematic of an old pinball machine (redrawn for clarity):
L1 is a Solenoid and Q1 is a Darlington BJT (...
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MX1508 motor driver flyback diode controversy
Hi I am trying to use the MX1508 motor driver with my 6V dc motor, but I've read criticism that it doesn't have flyback diodes.
I'm seeing conflicting opinions online about this.
For example, in this ...
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USB Qualcomm Quick Charge 3.0 on PC (Linux Ubuntu)
As nowadays PC motherboards supports USB voltage manipulation I will ask on given example hardware/software.
I am using Ubuntu 20.04 installed on machine with Motherboard Gigabyte AORUS Z390 Master. ...
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Stepper motor shaft vibrates, and vibrates the load
I am new to the electronics hobby so any help is appreciated. For my application I need a quiet motor that can provide high torque at low speed.
I purchased a NEMA 17 stepper motor (model is 17HS4401s)...
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BLDC motor and drive power loss calculation for dynamic application
what I have done so far:
calculated torque and speed of the motor (robot arm swinging mass)
used equivalent circuit for DC motor as model for BLDC:
U_terminal=L* di/dt +(I_o+ I_load)* R_ph-ph +k_emf *...
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What is proper power / driver size to use with an Osram Oslon Black Flat Led board?
I am trying to determine the proper power to send to my specialized LED board. The board consists of 6 Osram Oslon Black Flat Leds. I currently have 4 of these boards, 2 in each headlight. I have each ...
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Half H-Bridge using IR2104 doesn't work
I'm trying to build a half H-bridge using an IR2104 driver. I want to use it for driving "high power" things such as a brushless motor (100V, 40A), or high power LED (200W).
But it doesn't ...
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What device to power 4 directional coils to rotate magnetic field
I am trying to make a solid state device that creates a magnetic field applied on an sample that can control the field direction and strength.
My current design uses a 8 coil stepper stator that has ...
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L298N Current or Voltage source
I want to power some coils using a controlled current, but I know as the coils heat the resistance changes. Will the L298N keep that current controlled at a certain enabler voltage?
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L298N minimum output current/voltage
Does the L298N have a minimum output voltage? I want to control it such that the output varies from -Vs to +Vs, does it go linearly near 0, or is there a threshold that it passes? I can't tell what ...
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Help to select MOSFET gate driver
I am implementing a system where I need to use 2 switches, 1 NMOS and another PMOS. The switches are controlled by a PWM wave that operates at a frequency of 1MHz.
You can see in the attached figure ...
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How to read data from Agilent 34401a using GPIB-USB-B connection
I want to read data from an Agilent 34401a DMM directly into python or matlab so the data can be automatically recorded. However, I can't seem to make the connection. On my computer the device is ...
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1-10Hz frequency count translated to PWM for stepper motor RPM
I would like to control the speed of a stepper motor based on an input signal that consists of short 12V pulses at a varying frequency of 1-10Hz. I know this is an easy task with a microcontroller but ...
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Switching relay directly with an optocoupler
I have a relay network (more than 1 relay running in parallel), that I need to operate using a STM32 based MCU.
The relay I am using is Omron G5V-1 (24v).
I wanted to know if I can directly run these ...
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85W laser array driver circuit
I have an OSRAM 85W 450nnm laser array.
It's essentially a large 'chip' with 24 integrated laser diodes (break it down they're approx 3.5W diodes each.) The Chinese source I purchased it from also ...
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TPS61180 backlight blinks once
I received SmallHD 5" display which was broken by supplying 14.4V by a mistake. It runs on 7.2V typically. The monitor is fine, just the backlight went bad. I replaced TPS61180 right off the bat ...
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Killed two Teensy 4.0s with this circuit - looking for help diagnosing
I have created a circuit for my Senior Design project at my uni. This circuit is meant to receive a signal from a contact microphone attached to a brass instrument, pre-amplify it, and analyze to find ...
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Can a voltage higher than 5V be applied to the 28BYJ-48 (5V) stepper motor?
I want to automate my roller blinds by using an ESP (NodeMCU) and I was thinking of using a stepper motor.
I had a 28BYJ-48(5V) stepper motor laying around with the ULN2003 driver it came with.
...
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Driving a NEMA11 stepper motor
I got a NEMA11 bipolar stepper motor rated at 3.8V @ 0.67A, 5.6Ohm and 4.2mH. I thought to run it with the D1 mini powered via USB and using its 5Vout for the SN754410 H bridge and motor power:
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Bootstrap Capacitor Calculation
In this link it explains how to calculate bootstrap capacitor for IC Mosfet Driver. In the Vboot formula as shown there is Vgsmin (minimum gate source voltage). Is Vgsmin the same as Vgs or not? ...
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How to calculate this capacitor value?
How to calculate this capacitor on pulse transformer primary?
I've tried 470 nF but the PWM on capacitor's output lost its level, normally both PWM are 0 to 12V, but when I put this cap, the PWM on ...
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Pull-up resistor
I am making a BLDC motor controller , so can you tell me the use of pullup resistor connected in the feedback of hall sensor.And is HO is equal to VB voltage when driver circuit operates ? Please ...
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Small single phase induction motor - triac control for startup and run
To repair a control board for a small single phase induction motor (35W 0.38A) I created this schematic to help me understand how it operates. The motor was overheating and not starting/running "...
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H Bridge Gate Driver Current Sensing
I want to build my own 120A Electronic Speed Controller and decided to try it with the DRV8305 IC. I am by no means a hardware expert, so go easy on me.
On page 45 of the DRV8305 datasheet: https://...
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Single buffer line from 74ABT244 to 16 inputs for 74AHC245?
I am designing a circuit which will buffer 3.3V input from Raspberry pi using 74ABT244D,623 and there will be 4 output chains on the PCB. Each chain will be connected through FRC to a second PCB with ...
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Modify the output voltage on a PWM controller to fall within LED driver range
I'm trying to use a simple PWM controller (this) as a dimmer for a Meanwell LED driver (this).
The driver accepts PWM dimming but needs a voltage range of ~2-8V, and the PWM controller outputs 7-12V ...
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Why can't I have a PWM signal with 5V in the PCA9685 PWM driver?
I've got a BLDC motor which I can control with a PWM signal ranging from 0V to 5V. So I use the PCA9685 PWM driver to create a signal. The PCA9685 product page at Adafruit says this about the output ...
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My LED driver keeps blowing up when connected to a Lipo battery
I bought this LED driver for my Cree XHP70.2 LED
The driver specs are:
Input voltage: DC7V~15V
Output voltage:DC6V
Current: 4-4.5A
Single mode full power
I connected the driver to a power generator ...
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Valve driver specifications
I need to control a NSF/ODE JM R1 2/2 valve. Here the datasheet (Gofile link).
I cannot understand the electrical requirements. It says:
Power: 5W DC
Running power: 10 VA AC
Startup power: 15 VA AC
...
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Replacement for obselete Infineon TLE52062GAUMA1 device?
I have an existing system that I wish to replace one of these Infineon TLE52062GAUMA1 motor drivers in. It's a H-bridge 40V/5A driver in a TO263 package. (https://ie.farnell.com/infineon/...
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How could one "inverter control" convector heater be more electrically efficient than another?
I'll have to explain it step by step so that you have no chance to misunderstand what I'm asking about.
First, what a convector heater is. It's a plasma TV shaped box usually made of sheet steel. ...
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Do I need a driver for a single laser?
I want to hook up a 9v battery to a laser diode(linked to the ones I will get), but have seen laser drivers scattered across the internet and vaguely have heard of them. Do I need one to use the laser?...
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Do I need a gate resistor and/or a pull-down resistor for a TC4420 (or any gate driver) driving a MOSFET?
I've tried to search for this but I have [not] seen any combination of which resistors I need and which I don't need, so I'm not sure what to do.
I'm planning to drive an IRFZ44 MOSFET with a TC4420 ...
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Input impedance of TTL driver in a RF switch
I have a RF switch "ZYSW-2-50DR+" which has a built-in TTL driver. So far as I understand, the driver is like a buffer which amplifies the current while keeping the voltage same(unity gain). ...
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Question about component name (DrMOS?)
I'm trying to find the fault on my GTX 970 card and it seems that I have found at least one of the problems. There seems to be a DrMOS(?) that after plugging the power in is getting hot to the touch ...
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Darlington transistor for driving coils
I try to drive two small pcb coils. The coils have a resistance of around 14 Ohms (i dont know the L value). I have a PIC10F200 controlling the base of a BCV27. However i dont seem to get much more ...
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Regulator Getting Hot. Is The Mosfet Driver At Fault?
i am using a TC4424 mosfet driver which has a peak output current of 3A driving a irl3705 mosfet(which is driving a 400mA load),
The mosfet driver along with rest of the circuit is being powered by a ...
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227
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Power tree understanding
I am projecting a brushless motor driver that contains a LoRa SX1276 radio and a ESP32-D0WDQ6 chip. The power line then gets really noisy when everything is working.
For the RF blocks (SX1276 and ...
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BLDC Motor question
Im looking for a solution, i have a 3kW 320V 3000rpm rated BLDC motor with position hall encoder and a chinese driver. The hall-feedback is working with it.
I would like to use motor between 15 and ...
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2
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174
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Difference between two gain +1 op-amp topologies
I've got two differential driver circuit designs that take a single ended input and provide as output a buffered pair of +1 and -1 times the input and I'm struggling to understand the difference ...
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