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

learn more… | top users | synonyms

0
votes
2answers
80 views

Do I really need an H-Bridge controller in this application?

I'm looking to integrate a latching solenoid in my next project. I found a 5V latching type here: LHLA0531111H The manufacturer recommends I use an H-bridge to control switching of the solenoid. ...
0
votes
0answers
53 views

Circuit components work individually but not together (buck converter and h bridge)

I need to regulate 15V to 12V to power a 12V motor. Additionally, I am using an h bridge so I can control the direction of the motor. Thus, our power path is 15V supply -> buck converter (12V out) ...
-1
votes
0answers
29 views

How to wire an LMD18200 and an arduino? [migrated]

Ive been working with a motor project for a while and i bought this H-bridge(LMD18200). I dont understand how im supposed to connect it to the arduino. Here is the datasheet for the lmd18200:
0
votes
1answer
46 views

My H-bridge can't control my 3v motor

I'm trying to control my 3v motor from my 5v arduino. For this i use : 5 volt power source from pc for the arduino L9110 H-bridge module 2 AA Battery as power source for the L9110 H-bridge Here ...
-3
votes
0answers
36 views

H bridge Problem no output with load attached

My H-bridge works without any attached Load. I have checked the output using voltmeter and it changes its output direction as I want. The problem is it provides 0 voltage when I try to operate a ...
1
vote
2answers
69 views

Mosfet H-Bridge Design Question

I have a few questions regarding an H-Bridge design that I like. I am having a little hard time understanding some parts of it. So this is the design that I found online here. I changed the motor ...
2
votes
3answers
53 views

Boost converter for high side Mosfet

I recently came across an article explaining how to drive a high side MOSFET using a "separate isolated power supply whose ground and the ground of the MOSFET-based circuit are isolated". However ...
0
votes
1answer
31 views

Would having a DC-to-DC Step Up Converter Damage the L293D H-bridge IC behind it?

I recently purchased two L293D H-bridge Motor Controller from Adafruit (data sheet here), but after reading that the controller could only output a max of 600mA for a short time, I realized I had a ...
0
votes
1answer
52 views

H-Bridge driver circuit design

I have built the following H-bridge driver circuit (The red resistors R9 and R10 were not included). However during testing I have found that I am constantly blowing the high side P-Channel MOSFETS ...
1
vote
1answer
77 views

How to convert an DC to AC signal more efficiently H-bridge?

Currently I am working on an project to feed back the output from an solar panel to the grid. One of the circuits used is the H-bridge. This part is used to convert an arbitrary DC signal to an AC ...
0
votes
1answer
46 views

Driving MOSFET with load on source

I would like to know what circuitry I will need in order to drive a N-Channel MOSFET (IRF1405) with the load placed on the source. From my understanding the laod is placed on the drain however I ...
0
votes
1answer
108 views

Can you drive a motor bidirectionaly with just N channel mosfets?

I bought a bunch of IRFZ44Ns from China in the hopes of driving a motor bidirectionaly controls from and Arduino, but now I realise that a full bridge requires both P and N channel mosfets.. Is it ...
0
votes
2answers
73 views

Arduino hacked rc car, H bridge, logic voltage overwhelmed

I have hacked my old rc car like in this tutorial here I have measured manually the h bridge logic voltage (the voltage that the transceiver send to the h bridge) , which is 3.7volt in the ...
0
votes
2answers
37 views

Harmonic's equations within Single Phase Full Bridge Inverter

Is it possible to find the equations of certain number of harmonics (Ex : 3rd, 5th, ... 17th) in Single Phase Full Bridge Inverter theoretically, using the characteristics of the components of the ...
0
votes
2answers
57 views

Scr triggering design, shuld i use four pulses for each SCR ot two for each pair of the SCR?

I have used a TRIAC and an MOC3021 opto-coupler connected to a PIC16F887A to simulate a a full wave rectifier. I am now to design the same using an SCR h-Bridge. My question is, in order to trigger ...
1
vote
2answers
135 views

Will this simple four n-channel mosfet H-Bridge Circuit work?

This is my H-bridge circuit without considering Back EMF. In the real circuit I would put four fast recovery diode to eliminate the Back EMF.Maybe schottkies? Before I came up with this design , I ...
0
votes
3answers
81 views

h bridge leaking current?

I have built an H-bridge with the following schematic. My motor controls a wheel that I want to turn backwards and forwards. The voltages to the bases of the BJTs are supplied by an Arduino. the ...
1
vote
1answer
56 views

Current split on sn754410 chip and electromagnets?

Here is the schematic, except this uses the L293d I wanted to better understand how does the current split (if it does) between two of these IC chips wired as diagrammed with 2 electromagnets on ...
3
votes
1answer
78 views

MOSFET fast turn-off not enough

I have a PWM bridge driving a higher than 1k load from 200V supply. The simplified, equivalent schematic is this: The drivers I'm using are slow turn-on/fast turn-off and, in the schematic, it's a ...
2
votes
4answers
76 views

Designing a gate voltage for N-channel MOSFETS for H-bridge controller

We have a project where our 2nd year students build an H-bridge controller from scratch. They learn a lot about power dissipation. We have a simplified design using IRF540 for the N-channel, IRF9540 ...
1
vote
1answer
67 views

multiple motor h bridge?

I see a lot of h bridge diagrams on the internet, more or less like this: If I wanted to connect let's say 4 motors in h bridge configuration while using the same power supply (12v) for all 4 of ...
0
votes
1answer
89 views

very low power h bridge

I am trying to direct a bi-directional dc motor that is about 1.5v (i got it from a micro servo and it is about half the size of a 130 dc motor at 1.5 - 3v) with the smallest power source/battery ...
0
votes
1answer
31 views

Consequence of uncomplimentary MOSFETs in Hbridge

I am constructing my own H-Bridge to control a high current motor (24V at 25A), as such I was looking to use high current MOSFETs for each quadrant of the H-bridge. My go too MOSFETs for these ...
0
votes
1answer
44 views

MOSFET H-Bridge Shunt Resistor position

I am designing a MOSFET based H-Bridge to handle high current. I would like to place a SHUNT resistor in the circuit in order to detect over current. The voltage across the shunt resistor is to be ...
0
votes
2answers
75 views

Protect circuit from current generated by backdriving DC motor

In our application we have two modes of vehicle operation: manual and autonomous. Meaning that when vehicle is operated autonomously we control a brushed DC-motor using an H-bridge. In manual mode we ...
1
vote
1answer
51 views

Can the high current motor change the ground potential level in the H-Bridge?

I'm planning a half-bridge driver with bootstrap IC-s. My motor runs on 12V, with 50-60A. I linked the schematic. I supply the bootstrap from an other battery (7.2V). Due to the big current, can the ...
2
votes
1answer
107 views

Shunt resistor choice for H-bridge current sensing

I'm trying to construct H-bridge using DRV8701 gate driver. This part expects you to attach low-side shunt resistor to measure current going through motor to limit your duty cycle if motor is stalled. ...
-2
votes
1answer
74 views

driving 10A motor [closed]

I have made a wireless robot with ht12d/e and l293 ic and i have used two type of motors. first motor(plastic geared) was working ok with l293(i.e it was working at 1A) second motor(johnson geared ...
3
votes
2answers
231 views

If two BJT bases are shorted, where does the voltage come from?

While trying to understand the circuit below in this question I got the idea that PNP base current is going into NPN base terminal. This way, you drive 2 transistors with only one base current. With ...
2
votes
1answer
109 views

H-bridge with BJTs: why do IC and discrete solutions differ (or Sziklai vs Darlington)

I've noticed that [now mostly defunct] discrete BJT combo packages for H-bridges (for example Sanken made a bunch of these, see STA474A schematic below [half-bridge shown]) as well [higher power] ...
3
votes
1answer
129 views

NPN vs PNP at H bridges

Lots of different darlington pairs datasheets indicates that NPN are faster(lower rise and fall times), stronger(has a higher Hfe and bigger current maximum) and because of gate source tension, easier ...
3
votes
2answers
71 views

Low Side Overcurrent Detection with Adjustable Maximum - Difference amplifier or non-inverting amplifier?

Situation: H-bridge circuit with mosfets. A low-side shunt resistor is used to measure the overall current. The selected bridge driver IC is equipped with an overcurrent protection feature. This is ...
1
vote
0answers
47 views

Thoughts about H bridge

I'm planning to build a pwm driven H bridge. I have all set up, flyback diodes, pull up and down resistors on high and low on bridge's side, decoupling capacitors and so on, but I only have TIP122 ...
1
vote
2answers
98 views

Common collector H-bridge driver - is there a way to do this with MOSFETs? Gate voltage seems too high

Background I made 4 of the following push pull circuits like the one below, to use as two H-bridge drivers for motors (stall current about 5A.) Sorry for not drawing the darlingtons in full, I did ...
0
votes
2answers
97 views

H-bridge circuit using only NMOSFET [duplicate]

I have understood that I have problem with driving High Side MOSFETs as their Gate Voltage must be bigger in respect to their Source voltage. How do I provide a higher voltage supply rail for the gate ...
0
votes
3answers
253 views

Is it possible to build an H-Bridge with only N-MOSFETs (and these other components)?

I am trying to design an H-bridge circuit and I am only given the following components: Opamp Zener Diode Resistor Capacitor N-MOSFET NPN BJT Diode 2-input NOR 2-input NAND Infra-red Detector ...
0
votes
1answer
75 views

Is my H bridge circuit correct?

Circuit operation of this circuit is when Switch is turn on as shown below , Q4 and Q3 turn . When the switch is turn downward , Q1 and Q2 turn on. Does the circuit I created follow the circuit ...
-4
votes
1answer
95 views

NPN Transistor; base grounding through emitter

I am using NPN transistors in an H-bridge to connect a DC motor to ground. My problem is the base of the transistor seems to be grounding through the emitter pulling the value of my logic circuit to ...
1
vote
1answer
100 views

Motors and H-bridge - High current on PCB

I want to control a motor by using H-bridge on PCB. I am using IRF4905 and IRF3205 MOSFETS (P and N, respectively), and some 4N27 Optocouplers. The motor takes about 70 amps How can I make my ...
1
vote
2answers
99 views

Freewheeling Diode in Bidirectional Motor

I want to drive Brushed 12Vdc, 4A motor using two relays to achieve direction control. But what is the best way to connect freewheeling diode to it, I came up with this circuit. Is it the right way ...
0
votes
1answer
111 views

Avoid voltage drop on DC motor start-up with h-bridge

I'm trying to control a 12V DC brushed motor (4A with load ) with an H-bridge , TLE5205 datasheet ( 5A , 6A peak , 40V , integrated free-Wheeling diodes ), but when using a 3S1P lipo battery ( 11.1V , ...
0
votes
2answers
62 views

Is this a proper small signal H-bridge?

The inductor in the middle is the coil of a single-coil latching relay, which requires a H-bridge to drive. How do I add flyback to the 74HC04's internal MOSFETs? ...
3
votes
1answer
84 views

High current ripple through inductor

I am trying to figure out a way to create a high current ripple through and inductor, similar to that of the ripple the inductor sees in a SMPS. I would like to put a 2A peak to peak 400KHz current ...
0
votes
1answer
74 views

Driving an H-Bridge from one pin

I'm attempting to set up an H-Bridge that can be controlled from 1 GPIO pin of an Arduino. I tried setting up the following circuit with a lab power supply and noticed the following: When Vin was ...
0
votes
0answers
42 views

How to model half bridge in Spice?

I tried to model a MOSFET half-bridge in Spice like this: ...
0
votes
0answers
44 views

H-Bridge Motor Stuttering

I've built a little 2-wheel robot connected to a Raspberry Pi and I'm attempting to drive it using a SN754410NE H-Bridge. It's plugged into a 9V/650mA power plug. When I run either motor on its own ...
0
votes
1answer
123 views

12v driver 24v h-bridge

Hi, I want to run a 24v motor with a 12v h-bridge mosfet driver (HIP4081A). I haven't try it in real life but I made the schematic. I want to know before testing it if you can find any error or bad ...
0
votes
2answers
131 views

DPDT switch using only transistors

I have seen a number of similar questions but no one ever seems to actually answer this question, so let me pose it a different way. Let's suppose I am stuck on a space ship (so I can't go buy some ...
0
votes
2answers
106 views

Help building a scheme (involves L293D H-bridge)

I'm making a bluetooth-controlled fire truck for my son based on an old wire-controlled truck I bought at a yard sale. It didn't have its wire-remote. I already got Arduino Nano to drive 2 motors ...
0
votes
1answer
31 views

Output capacitance of H-Bridge IC (DRV8432DKD) for snubber design

all. I have implemented a hydraulic pump driver circuit using a DRV8432DKD (36-HSSOP package). I provided pads for an RC snubber on my PCB, but I am having some trouble coming up with the values for ...