Questions tagged [high-side]
High-side refers to DC+ positive line.
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MOSFET h-side turn on
I implement following circuit
I used 12v alarm instead of led at high side.
I used two 5.6k Ω resistor (blue) at place of Rg and 330 Ω resistor in place of R1
I used the same IRF630 n-channel mosfet
...
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Bootstrapping circuit vs. charge pump for high side switching
I am designing a circuit where I need to do some high side switching to turn on/off the power to a circuit (part of some protection circuitry). This switching is actually very slow and only occurs ...
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Driving a 12V ~500mA load with a 3.3V logic level special pin GPIO0 on a ESP07s and ULN2003
As some of you know GPIO0 is a special pin that needs to be pulled HIGH during start-up else the ESP07s enters flash mode.
Questions:
The pull-up to 3.3V works right? My thinking is that if I have ...
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Active Half-Bridge Driver Circuit
Consider the folLowing half bridge circuit:
I'm designing a half-bridge circuit to be controlled by a microcontroller. Ultimately, there will be 3 copies of this circuit for an ESC. I am hoping to ...
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Gate driver circuit design for High-side and Low-side
I am designing integrated DC-DC converter with multiple output. As I am new to Analog design, I am trying to figure out what type of circuit topology is to be used for high-side and low-side switches. ...
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N-channel as high side switch is always on
The end goal is to use an N-channel mosfet (SiS176LDN) to drive as strip of LEDs with a stack voltage drip of 20 V and run at 4 A, I chose this specific mosfet because it seemed to be logic driven. It ...
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select the proper HALF-BRIDGE DRIVER for DC motor application
I was looking for a HALF-BRIDGE DRIVER for my H-bridge and BLDC motor projects, however, I found most of the MOSFET gate drivers are two types
One has SD (Logic input for shutdown) and IN (Logic input ...
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Buck Converter Gate-Source Voltage anomaly
I have a desinged a buck converter which has a high side MOSFET, and due that when simulated on ALTIUM the circuit did not work as expected without a bootstrap configuration.
Now with the bootstrap it ...
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LTC7000 IC Iset pin broke in some way
I have a LTC7000 IC schematic like below. IC fault pin show around 10V and its fine. I can turn on and turn off mosfet at least 3 or 5 times. I can turn off mosfet under without current and after that ...
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Choosing an appropriate gate driver for IRLZ44N high side for a buck converter
For the TL;DR folks:
Need high side NMOS gate driver IC, similar to Julian Ilett's DCOI driver but cheaper, higher switching speed and less complex;
THT highly preferred, because 1,27mm perfboard is ...
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Any gotchas using high side side load switches to drive other load switches?
I want to make a power distribution board using high side load switches, something like this Infineon product: https://www.digikey.com/en/products/detail/infineon-technologies/BTS6143DAUMA1/1281799
...
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How is this a current mirror?
This article is talking about floating an IC's GND to use it at a common mode voltage higher than it is rated for. It then says it level shifts the IC's current output to ground by using the Q1-Q2 ...
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IRLML9301PBF as high side switching for 5 V, 2 A load from a 3.3 V uC?
Circuit:
simulate this circuit – Schematic created using CircuitLab
I would like to cut off the power to my APA102-LED-strip during uC sleep -
as the standby current of these strips is relative ...
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GND nomenclature for high side switch
Ref
What is the difference between device GND & board GND?
The term 'GND Shift' is used multiple times? Does it mean a change in GND potential from 0V to say, +x Volts?
Could you give an ...
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High side switch with inductive loads
Seeking help with the following datasheet. Section 9.4.3
Didn't understand the above calculations. It states that for inductive load energy dissipation, the energy from the source and the load is ...
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Electrical characteristics for high-side switch
Ref
What is the role of KCL
Previously, when I encountered this parameter, it was used in calculating the value of RCL, but it only had a single value eg say, 2500.
Could you explain the role of KCL
...
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Need help TPS1H200 High Side switch
TPS1H200A-Q1
How is does the FAULT pin work? (from what I gathered when I(lim) threshold it hit, fault is reported as FAULT = LOW. During normal operation FAULT = HIGH (no issues)
How / where is the ...
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Logic-level, high-side, P-channel MOSFET switch
I want to use a MOSFET for high-side switching of the DRV425 fluxgate as it has no enable pin, and has quite a high power consumption (150 mW @ 5V -> 30 mA):
Before the P-channel MOSFET WTM2301 ...
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High voltage sensing - voltage to current converter
Hi i need to sense the voltage of a floating load anbd TI suggest placing a sort of common emitter amplifier as shown below:
however im not sure how they calculate the sense voltage:
How is the ...
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Connecting the GND of an isolated circuit to the positive side of a 450V transformer output
I moved to a new company that makes very big old-style controlled rectifiers. They asked me to make a new modified, and enhanced thyristor-controlled rectifier. The strangest problem I faced is that ...
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Gate source voltage of half bridge with bootstrap capacitor incorrect when measured
I have a gate driver circuit (Bootstrap capacitor for high side) as in the given diagram.
I measured the Vgs for high and low side as shown in the figure below. I get the wrong voltage level for the ...
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Self-boost charge pump for high-side driving: how to drive the high-side driver itself?
This is the circuit:
My question is: how can I send signals to the high-side MOSFET driver?
I thought about this way:
But "B" may be 0 V when the MOSFET is on, resulting in a negative ...
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Should I connect the base of a 5 V high-side PNP to a 3.3 V GPIO IC?
I'm trying to drive a 5V 200mA fan from a PCF8574 powered by 3.3 V. For context, I asked a separate question about using active low vs high on this expander, and @Justme recommended using a high-side ...
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Only low-side output from MOSFET drivers is working
I have 4 N-channel MOSFETs connected in a bootstrap configuration with an IRS2108 MOSFET driver. Currently, only the low-side output works with this circuit. I am not sure why that is.
The schematic ...
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Discrete high-side driver for GaNFET
Background:
I am designing a buck/boost converter to convert back and forth between my supply voltage of 3.6 V (battery) and an output voltage of VDD = 60 V to bidirectionally drive a capacitive ...
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Compromising between Inrush and turn on time for MOSFET SOA operation
A hostwap controller as the shown here is used to to precharge and control a high side load:
In a hotswap control Q1 will spend some time in the saturation region during start up and turn off to ...
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High side current sensing amplifier placed on low side. Possible?
I am trying to build a custom 12 volt battery current sensor for my car as a little hobby project. I want to place a shunt on the negative side of the battery, and get the measurements from there and ...
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P-CH MOSFET high-side switch not turning on
The datasheet of SE2305Q is HERE
I have an LCD screen that comes with a backlit_power pin which requires 3.3 V to light up. It draws quite some current, and I don't think it is good practice to ...
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High-side IGBT driver
I am trying to implement a high-side gate driver using an IR2101. The power supply of the IGBT can go up to 60 V and 9 A.
The idea is to switch ON Q1 using high-side circuitry and then switch OFF Q1 ...
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High-side MOSFET switch
I would like to switch 3 separate 60 V, 20 A fused loads on/off high side from an ATMEGA328P.
It needs to be switched high side for 2 reasons,
I don't want live to have the potential to short to ...
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High current shift register source (mic5891 alternative) [closed]
I'm trying to control 60 loads (solenoid valve with integrated control circuit,12v dc) requiring high side 50mA source current control signal using an MCU (3.3v)
I need to control them individually so ...
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Maximum output voltage for a buck converter with IR2110 as its driver
I'm currently making a buck converter (rated output of 60V/10A) with IR2110 as its high side NMOS driver. The driver and buck converter circuit can be seen in fig 1 and 2. I've asked a bit on this ...
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P-MOSFET - voltage on a drain pin when fully off
I'm trying to implement high side switch using P-MOSFET with NPN driver. I will drive the whole switch with AVR GPIO running at 3.3V (3.3V GPIO label). KT231B9 (it'...
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High side power switch IC drops 0.5V when loaded
I setup a circuit shown in AP2411 data sheet on a solder-less test board and connected the output to 30 ohm resistor to ground to simulate about 100mA of current. Input voltage is 3.3V from a lab ...
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DIODES' AP2411 high-side switch usage
I built circuit for DIODES' AP2411 high-side switch on a solderless test board and connected the output to 20 ohm resistor to ground. Input voltage is 3.3V from a lab power supply. The output voltage ...
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UCC27211 Gate Driver High Side Output Randomly Turns Off
I am operating a half bridge. The high side gate driver output randomly turns off. I am unable to identify why this may be happening. Attached is an image (Pink: HO, Cyan: HI, Green: LI, Blue: Vgs(LO)....
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Solid state relay output connection: Is there a difference between high-side and low-side switch configurations?
I am planning to use this SSR chip.
I decided to use the "Connection C" configuration which is given pictured in the 2nd page of the datasheet.
However, there is something I don't like ...
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High-side current sensing questions: Gain formula and circuit type
What is the formula for the gain in this circuit? I can not find a good description of the operation of this high-side current measurement. Why is there a PNP transistor at the output? What is the ...
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Can you drive a P-MOSFET as a high side switch directly from a microcontroller?
I have an engineering background, but close-to-zero practical experience with discrete electronic circuit design.
simulate this circuit – Schematic created using CircuitLab
Regarding the above ...
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High side switch for high voltage Nixie tube
Short version:
I am looking for a high side switch (20mA, 400V) circuit for half wave rectified mains, which I would be able to control with 5V GPUO.
Long version:
I am building a Nixie clock with ...
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To minimize the power loss in MOSFET of current control circuit
I am going to measure the electrical response (voltage drop vs current) of an electrical contact joint modeled as resistance 0.4 ohm in following figure. I made a prototype circuit to control the ...
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High side mosfet 12V switch from isolated 3V3 GPIO always ON
I design a High side mosfet 12V switch from isolated 3V3 GPIO on previous post, based on EL3H7-G (C) Optocoupler and STR2P3LLH6 Mosfet but it's alway ON... I don't understand why.
SCHEMATIC
I check ...
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Reference ground for Vgs on the source pin of an N-channel MOSFET
Hey fellas,
So I'm trying to take advantage of n-channel mosfet's inherent low RdsOn, but also want a high-side configuration. I've got the following circuit here and it seems to work in this ...
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PNP high-side switching with logic reverse
I am trying to design a High side switch(24V,10A) using a PNP Transistor, the switch control signal is PNP or NPN from the PLC output.
How to select the control signal type (NPN or PNP) using a ...
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High-efficiency, battery powered high-side load driver [closed]
I need to drive a resistive load with low-voltage and relatively high current, in a battery powered system. Since I need my load to be grounded, I would like to use a push-pull or high-side drive. I ...
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N-MOSFET driver for P-MOSFET high side switch
I need to create a high side switch to drive a 2.5W resistive load, which must be referenced to ground. I'm planning to use a P-MOSFET as load switch. The problem is there I have an inconstant voltage ...
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Problem Implementing high side P channel mosfet power source selector
I have build the above circuit on a breadboard and it is almost working but not quite. I've spent a number of hours on the problem to no avail. My background is not electrical but I've been building ...
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Buck converter high side switch GND
In Figure 1, I designed a synchronous buck converter using the IR2110S half bridge gate driver integration. However, when I look at the source-GND measurements of the high side MOSFETs in Figure 2, I ...
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High resistance between control ground and power ground of a gate driver IC in high-side configuration
I am working with a circuit configuration where a gate driver IC (ISO5852S) is used as a high-side gate driver and the bias supplies of this IC is coming from three isolated DC-DC converters. I intend ...
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Did I understand this diagram correctly? How do you put a load on a positive wire?
Sorry I mixed up the two diagrams, I thought both diagrams were using FETs on the right side.
I am trying to turn on a 5V separate power source with a 3.3V GPIO output.
I have two separate circuits, ...
