A circuit which allows power to be applied to a load in either direction. Often used for reversible motor control.

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Circuitry for the DRV8840 Motor Driver

I'm building a circuit based on the DRV8840 (datasheet: http://www.ti.com/lit/ds/symlink/drv8840.pdf). Unfortunately, I can't get it to work. I think something might be wrong with my design. When I ...
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40 views

What is a Half Bridge Circuit?

I'm having difficulty understanding what a Half Bridge circuit does? Would you please describe what it does and what is its purpose? Is it used to switch a load at a certain frequency? Also what ...
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2answers
48 views

voltage drop over IRF9540 = IRFZ440N H-Bridge

I am trying to build a simple H bridge as part of a learning curve. At the moment it is on a breadboard. I am using 2 P-Channel MosFets (IRF9540) and 2 N-Channel MosFets (IRFZ440N). They are tied to ...
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20 views

Trilevel PWM for H-Bridge, potential shortcircuiting in inverter

Here is the schematic I have followed, mine is not exactly the same, but for the most part, it follows the same method, generating a sine and triangle reference, generating a square wave and then ...
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1answer
44 views

Filtering the output of an H-bridge

What's the best way to filter the output of a H-bridge? I have a PWM output at +/- 20 V and I want to get a 10V RMS sine wave out at 50hz Also is there a way to do it without inductors?
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47 views

Cause of shoot-through in H-bridge

I've designed an H-bridge for a 15A DC motor. Power is applied by plugging in a very high-capacity Lithium battery. Unfortunately, when I plug in the battery, one of the transistors goes pop instantly ...
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22 views

H Bridge speed control

So I'm trying to modify the speed of a motor through use of an arduino and a H Bridge, but adding different ohm resistors to the lie between the external power and pin 8 of the bridge just doesn't ...
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1answer
75 views

What is causing this level shift in my wave?

Excuse the quality, sorry; RED is GATE of Q2. YELLOW is GATE of Q4. 5V INPUT AT ALL STAGES What are possible reasons that my H-bridge has a little 'bump' at the turn-off of the high-side? It's ...
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58 views

How do you correctly measure the gate voltage of a MOSFET?

If you have a half-bridge, or an H-bridge, or some other usual configuration; and you want to see the voltage you are getting on the gate, to check for any errors and shoot-through. Do you do it like ...
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1answer
115 views

How to pick a microcontroller? [duplicate]

I have a rudimentary understanding of electronic components and computer architecture. I've built a CNC laser engraver. I created my own h-bridges, and my own laser driver, etc. However, the device is ...
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1answer
41 views

Testing an h-bridge using the power supply and/or signal generator to control a DC motor

I'm using the DRV8836 (datasheet here) from Texas Instruments and can't seem to get it to work. Does it require a PWM (pulse from the signal generator) or am I able to drive it with only the DC power ...
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2answers
72 views

Circuit design recommendation to prevent a failing regulator

I designed a PCB that contains, among other things, a switching regulator circuit and an H-bridge for a DC motor. The whole circuit is powered by a 15V Lithium battery. The switching regulator ...
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1answer
52 views

Where do you put the gate-protection zener diode in an NMOS H-Bridge?

Do you even include it for an NMOS H-bridge? Because typically I've only ever seen them in NMOS/PMOS bridges, not full NMOS bridges. (Inductive load) The protection zeners would go here right?
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46 views

Critique and dos/don'ts for an H-bridge PCB design?

Honestly have no idea if this is something this site was made for, but I have a couple of questions about my design, mainly it comes down to "Will it work?" and "Why would it break?". JC1 and JC2 are ...
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2answers
98 views

Drive DC Motor with H Bridge(H Bridge turns off too slow and problem with current monitor)

I have two questions about my circuit, drving DC Motor with H Bridge. The picture below shows my design and how I drive it with signals. For example, when I make the motor rotate forward, I give ...
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3answers
62 views

H-bridge tiny spike?

My high and low side gate measurements to GND show a tiny little shoot through spike. Adding dead time, Zener bypasses over R(g) and from G-S, and TVS diodes does not do anything. The load is 100K ...
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18 views

H-Bridge driver misfiring and referenced to >VCOM?

Circuit below. Circuit is a full-bridge with IR2183 drivers being operated at 12V. Measurements were taken with reference to GND at JC2. Hey, take a look at this stuff, HIGH SIDE IN RED, LOW SIDE IN ...
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1answer
53 views

H-Bridge controlling circuit

I'm in need of an H-Bridge capable of driving moderate-high current for motors on a small car (7A peak, 2-3A nominal, 12-14 VDC), and I'm hoping to control it with two (2) digital pins (5 VDC). I've ...
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56 views

Stepper Motor H Bridge High Side N-Mos Burn Problem

Last year, i designed a stepper motor driver card with DRV8711 and CSD17506. I am driving my stepper motor with Vm=24 Volts and motor current Im= 2.14A. Texas Instruments gate driver drv8711 is ...
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1answer
62 views

wiring for a 4 wire AC motor

I have a working garage door opener and I'd like to use its motor for building a edge sander (woodworking). The model number is the Genie IMS1000 and here is the actual picture. It has a single ...
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1answer
287 views

Why use a N channel MOSFET as high side H bridge switches?

I've seen N channel MOSFETs as high side switches of H bridges quite often, which requires a charge pump to drive. Wouldn't a P channel MOSFET be easier, simply isolating the microcontroller command ...
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1answer
28 views

L293ne wireing help

First real project in many years so please accept my apologies of this is a silly question. I want to use the L293 to drive a motor (or 2). Using a raspberry pi which I have done using the add on ...
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2answers
56 views

DC Motor giving poor output waveform - how do I fix?

I am trying to make a DC motor controller with an H-bridge and PWM powered. The circuit diagram for the motor controller is: The inputs can obviously only be on 1 at a time to prevent short ...
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1answer
107 views

Full-Bridge Inverter

I'm building a Full-bridge inverter with input of up to 36V, Four IGBT are used for switching and embed micro controller for PWM. To drive IGBT I'm using four HCPL-3120 chips. After testing the ...
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2answers
109 views

H-bridge mosfets exploding

Something odd is happening in a h-bridge design I've made. Schematic: The part numbers in the picture are wrong, sorry. The n-channel mosfets (the bottom 3) are all 2N7002Ps, and the P-channel ...
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1answer
48 views

Driving a low current solenoid with a low voltage H-Bridge

I'm trying to drive a solenoid to create a magnetic field. I've got a constant current controller circuit that supplies the current I need, but I'd like to control this using an H-Bridge so the the ...
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1answer
217 views

Analysis about H bridge to drive DC Motor

the picture below shows my design about driving DC motor with H bridge. There is one problem, for example, I turn on the U1B and U1A(use PWM to turn on U1B and the U1A is always turn on when I make ...
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1answer
71 views

Low cost H-Bridge circuit for PWM

I try to design a (relatively) low cost H-Bridge on N channel MOSFETs. I need to drive 8.5A peltier device with 12V and (roughly) 20kHz PWM. (after reading some of the comments I changed this ...
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1answer
43 views

What voltage reference is the pwm signal using in the QUADRUPLE HALF-H DRIVER SN754410NE?

I have a QUADRUPLE HALF-H DRIVER SN754410NE, and i saw online that the 5V from the arduino goes to pin1, pin 9 and pine 16 and on pin 8 you attach a separate 5v supply that has at least or more than ...
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27 views

Will my potentiometer provide enough amperage for my h bridge?

I am sending pwm requests to my H-bridge from an arduino. Each pwm signal is a precise so I need to have the h bridge drive it by that specific amount. I want to use 5V for the h bridge supply, so i ...
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2answers
119 views

Diode parallel to resistor on H-Bridge MOSFETs gates

I was looking at a TC4467's gate driver datasheet and there is one thing there that I haven't seen before when reading about H-Bridges. On the schematic of example H-Bridge motor control there is a ...
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1answer
58 views

Analog controlled H-Bridge to digitally controlled?

I am using this circuit to control a motor. Initially I was using 12V PWM generated from a 555 astable circuit. I am now trying to make the circuit controllable via an 8051 Microcontroller The ...
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3answers
77 views

H-Bridge with 1 PWM and 1 Output

I'm looking for a solution to control the direction of a powerful DC Motor. I came up with the idea to use a H-Bridge. Since the motor uses up to 3.2A the amount of possible H-Bridges is quite ...
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1answer
97 views

Boost converter as power supply for H-bridge

I am looking for a way to be able to power the H-brirdge from a boost converter. I have a voltage source of 13V to 15V and would like to boost that up to around 17V (accuracy isnt that important) at ...
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1answer
63 views

H Bridge Voltage Drop w/ Motor Installed

first post after searching the net/ site for quite some time. I have this H-Bridge circuit http://www.circuitstoday.com/h-bridge-motor-driver-circuit I'm using 3 AA batteries to test this BEFORE ...
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2answers
77 views

Will back emf damage a lithium ion battery?

I am prototyping a battery-operated toy containing a couple of motors - these motors are driven by a pair of h-bridges which are controlled by a micro controller. I'm running this whole thing from a ...
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1answer
89 views

H-bridge problem with TIP122.

I tried to make H-bridge by TIP 122 transistor. I used 9V for a VCC. I used push button to control H-bridge, and it's fine. Then I used Arduino 2560 with two digital pins for driving H-bridge. But the ...
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62 views

How to generate the gate voltage for the P-channel transistors for an H-bridge controller

I would like to create an H-bridge out of discrete N and P-channel transistors as a nice demo of the concept for a high school course. The driver is to be an Arduino should that affect your design ...
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1answer
50 views

What is the difference between an H-Bridge Motor Driver and Dual motor driver board?

I don't understand the difference between a motor-driver like this IC H-Bridge Motor Driver and a motor-driver like this Dual Motor Driver Board. When reading about them they do the same thing but the ...
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3answers
117 views

Soldering, Chips for Beginners

I am currently running a club for kids (9-11) for Arduino and we are making a robot and are moving on from motor/transistor drivers to half-hbridge (so we can go backwards). The kids are learning to ...
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1answer
58 views

AVR's and DC Motors\Servos

I've been browsing around looking for some information on motors\servos and AVR's (my MCU of choice). Motors\servos are in my gray area, meaning I'm still not too into them, but I could do something ...
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32 views

PWM capable H-bridge, best low side drivers

Im trying to make a high current h bridge 24volts around 60amps to start off with however I might decide to up it 120amps continuous if I can easily. I have already made a simple high side mosfet ...
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63 views

Forgot to connect ground for H-bridge, now it doesn't work?

I have an TLE5206 h-bridge IC that can handle 5 amps and I'm giving it a supply voltage of 12V. I was just testing the motor with the power connected but I noticed that the ground cable broke off ...
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1answer
85 views

Relay-like digital potentiometer?

I'm sure I'm not the first person to want to control an AC motor with their microcontroller and I've found a good relay module to use, however, I still want to be able to control the voltage via the ...
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4answers
185 views

Connecting two power supplies with same voltage rating to increase current output?

My h bridge requires 5v 1 amp. I have a 5v 500mA and another 5v 850mA power supply lying around. Can I join the +ve of both and send that signal to the h brdige so that it can have enough current of 1 ...
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5answers
435 views

Can someone check over my schematic?

This is the first schematic I have made that was not a simple LED. I want to know if it seems good before I go and build it (and buy the parts). Here is the schematic: Here are a few of my ...
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2answers
159 views

Measure current through H-bridge using shunt

I am trying to measure the current through the H-bridge and brushed DC motor and shut it off if it exceeds a pre-set limit. This is how I have it currently set up: simulate this circuit – ...
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2answers
358 views

Level shift circuit MCU to MOSFET

I have a H-bridge that is being supplied by 12V and using around 10A. I am turning it on/off with a microcontroller that has an output of 0V-5V. The switching frequency is "super low" so the gate ...
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1answer
77 views

H-Bridge Power Supply Erratic Behavior

Description: I have built a copper plating tank to plate circuit boards and am using a technique called Reverse Pulse Current plating to help aide in the copper plating process. What that involves is ...
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2answers
122 views

Boost converter as high-side MOSFET driver

I have a circuit where microcontroller drives a H-bridge which is powered from 12V. I am having a problem with driving the high-side MOSFETs. I will be turning the H-bridge on/off only couple of times ...