Questions tagged [driver]

A chip or a circuit that sends a signal with more current or voltage, or over longer distances.

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20 views

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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32 views

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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1answer
21 views

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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1answer
45 views

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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37 views

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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1answer
80 views

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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28 views

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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29 views

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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1answer
54 views

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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2answers
75 views

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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65 views

350 mA RGB LED driver IC

I need an inexpensive RGB LED driver IC with minimal BOM that: ...
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29 views

Passive-ish isolated IGBT driver with PWM design review

I would appreciate if anyone could give me some critique of my design proposal, is there any way it could be improved e.g. increased di/dt and dv/dt, sharper and more uniform gate signals? I am aware ...
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3answers
63 views

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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1answer
38 views

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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29 views

Will the replacement LED driver work for the LED light unit I have?

I have a light unit with 12 LED in series. The specs for the driver that fail are listed below. LED Driver, Model XSD7X1LE. Input: 120VAC 50/60Hz, 0.04A λ>0.5 Output: Constant Current: DC 280mA ...
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42 views

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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1answer
62 views

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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37 views

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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1answer
46 views

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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1answer
38 views

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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2answers
65 views

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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2answers
64 views

How to make a proportional current output on a constant current driver with PWM dimming

I'm making a constant current LED driver out of 2 2N2222 transistors and a couple of resistors. Works great. I added a PWM signal to the input so I could dim the LED, also works great. The problem is, ...
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36 views

BHI160b driver usage

i am trying to read quaternion's out of the BHI160b, that's why i purchased the BHI160b shuttle Board from Bosch. I want to connect it with my NUCLEO-L053R8 from STM. So i implemented the library into ...
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61 views

Mosfet drive for inverting buck boost converter

I'm working on an inverting buck boost circuit for university and have come up with the following schematic. I'm ordering quite expensive parts so I wanted to get some opinions and advice as to ...
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1answer
40 views

Help in understanding Audio line output stage

I was trying to understand the audio line output schematic shown below but couldn't make sense of it. This circuit comes after the output of an Audio DAC PCM1725, followed by an active 1st order low ...
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1answer
55 views

How to DRIVE a piezo driver circuit

I want to implement a driver circuit for piezo actuators for a positioning system. For this, I require a high-voltage, low-current output, similar to the one discussed here which features a circuit ...
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36 views

How to calculate the power dissipation of a receiver and a driver?

I'm using the AM26LV32E receiver and the AM26LV31E driver and need to calculate how much power is dissipated on them (max). I've been told I can calculate this using: (1) For receiver: ...
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1answer
33 views

LCD Driver Questions [closed]

I recently disassembled some old Night Vision goggles (Jakks Pacific Night Vision goggles) and found a 420x234 LCD Panel inside connected to a 40 pin ribbon cable. Do you know of any drivers I could ...
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1answer
27 views

Driving piezo scanner tubes using the driven internal electrode configuration

I'm planning on doing a project involving a piezo tube scanner (PTS). The PTS will be used for 3 axis manipulation of a sharp needle. PiezoDrive has a few scanners and some info on how to use them. ...
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1answer
97 views

Alternatives to op amps LM307N and TL071CN

I'am working on an amplifier/driver circuit for a spring reverb bank. The circuit is from the 90s, but still used: Accutronicsreverb Drive 1 Circuit My issues are the LM307N and the TL071CN. These ...
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2answers
82 views

Vacuum Fluorescent Display: What are the benefits of an AC filament driver instead of DC?

Question is already in the title: What is/are the benefit(s) of an AC filament driver instead of DC for VFD displays? It works with DC so why to invest in an AC driver? Anyone?
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34 views

LTC7001 Mosfet Driver is not working because of DPDT Relay

I am using a mosfet driver(LTC7001) to drive a mosfet. The mosfet is conducting 28 V continously which means its driver is always open. In a step I must reverse polarity of load by using a DPDT relay....
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30 views

Development kit for learning USB device driver development

I want to learn writing device drivers for USB devices (on linux kernel or microcontrollers, if that matters). Hence, I am looking for sample USB development kit. e.g. when I wanted to learn I2C, I ...
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25 views

How to install Arduino Driver, if it is not discovered by pc(Win10)?

I bought an Arduino Uno on amazon, and when I connect it to my pc it is not discovered by the pc. Even if I use hdwwiz and install the driver, it says that the ...
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1answer
48 views

Can this driver be simplified?

I have this driver. It has two MOSFETs and two complementary signals to drive them: The load (a bunch of LEDs) sees 5 V or 0 V and, in average, they take a maximum of 100 mA. However, the top MOSFET ...
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1answer
52 views

Temperature of Power Driver ICs

I'm using TI DRV595 power driver in an application requiring several amperes of current. My observation using thermal camera has been that at 3.5 A the driver IC core reaches temperatures around 90 ...
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25 views

Help finding an appropriate driver for brushless motor

I have a 28mm wide dc motor in the device pictured here. I have removed the control board of the device and am looking to replace it with an external driver board with RC PWM inputs for control. The ...
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1answer
43 views

Is it possible to drive a power piezoelectric in lower frequency than its own frequency?

I am driving a piezo transducer simply by an inductor series with piezo. the resonant frequency of the piezo is about 40KHz and I designed a 20KHz transducer. I'm giving a pulse voltage (using a class ...
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26 views

chip identification in synchronous boost converter

Trying to use a car 12V to 20V (laptop charger) for my TS100 solder iron and trying to find out why it shuts off, i blew up some component(s). In trying to recover from that, created a partly ...
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2answers
99 views

Controlling a relay with a MCU output pin and trying to drive a solenoid using the same power source

I've used a known circuit design to successfully (wait for it!) control a 12V relay using a 3.3V MCU pin, from the pictures you can check that I am using the same 12V power source for both (relay and ...
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52 views

Yet another constant current LED driver design, almost

I am about to design a constant current LED driver, with the following requirements: The LED string is fed with 24 V The FPGA interface is 3.3 V The system consist of 8 LEDs in a row, with ...
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27 views

SPI Timeout Issue with CH341A USB to SPI board

I'm trying to use the Aceli CH341A USB to SPI board to communicate with addressable LEDs, but it keeps timing out after 32 bytes. The board is unfortunately not that well documented (in English). The ...
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1answer
151 views

How to setup the NCV7708B h-bridge/double hex driver?

I am working on a circuit to control an electromechanical display and settled on the NCV7708B Double Hex Driver (datasheet). I created a minimal setup on breadboard in order to test the chip: I ...
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43 views

Turn on darlington(s) with 3V MCU

My goal is to get a 3.3V MCU (probably a ESP32) to drive this circuit. It is driven with a square wave from 15 to 40 Hz where the pulse width itself of 2.5 to 13 msec. When searching for answers, the ...
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35 views

ATSAM / ASF4 - how to use HRI driver

While trying to change the analog reference voltage in ATMEL Studio for ATSAMC21 I found no way to configure this in ATMEL start and in the higher level drivers. So I searched around the ASF a bit ...
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2answers
33 views

Should an NCP3420 Draw Minimal Current with Only VCC and GND

I am trying to make a Buck Driver (More Info). While Building up the circuit and testing it seems to draw too much current. The NCP3420 was getting warm. NCP3420 Datasheet After Removing it and only ...
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1answer
94 views

IGBT gate driver burned, why?

I am trying to use an IGBT module (dual IGBTs in common-emitter arrangement) as a static switch for 120VAC. I've done as much reading as I can, and I understand there are issues with losses and turn-...
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1answer
39 views

Unable to drive MCU pin high

I'm trying to drive a MCU input with a RS-485 driver chip, specifically the SP3485 on the SparkFun RS-485 transceiver breakout. When I connect the MCU pin directly to the 3.3V power rail, the pin ...
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100 views

Methods for increasing output power and efficiency of a ZVS flyback driver

I have built the following ZVS driver: I am using this circuit at a resonance frequency of 150kHz. My hope is to be able to modify this circuit for wireless power transmission. With that being said, ...
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1answer
56 views

Buffer / Line driver ; 3 state IC Working

I am just curious to understanding the working of this - Buffer IC (Part Number - 74AHC1G126) My questions : I figured out that this IC does not act as a level translator which changes the voltages ...

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