Questions tagged [low-side]
The low-side tag has no usage guidance.
0
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2answers
66 views
Mosfet Driver - High Side Output Problem
I've been trying to make a 3 phase inverter to drive a BLDC motor.
Mosfets : IRF3205
Driver : IR2101
Supply voltage for FETs and drivers : 12V
BLDC : https://media.digikey.com/pdf/Data%20Sheets/...
1
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1answer
108 views
Why does the PWM signals amplitude drop once connected to low-side n-mosfet switch?
I am applying a 3.3 V pwm signal to a circuit similar to the following (Credit: Olin Lathrop):
I am using an IRLR024N N-MOSFET, which switches if i connect the gate to the 3V3 pin of my ...
1
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0answers
110 views
How to isolate a RLC circuit with MOSFET switches?
I'd like to isolate, with high-side and low-side switches, a RLC circuit after the inductor has been energized with a current of 2-3A from a 12V source (see sketch).
When the RLC circuit is isolated ...
-1
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1answer
100 views
Measuring pwm output from low side FET with oscilloscope
I have a n channel MOSFET controlling a high current LED panel. The FET is driven by a FET driver, which is itself driven by a MCU pin. I am using PWM to control the LED brightness.
I want to double ...
0
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1answer
34 views
HO defaults “On” on high side/low side driver
I have an application where I need to drive 2 piezoactuators in a push-pull arrangement (voltage 180deg out of phase with each other) where the charge/discharge time is about 50 microseconds and the ...
0
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1answer
52 views
What is a (side) current alarm?
On the technical sheet of a motor controller integrating two BTS7960B (picture below), the description of the 8 PINs on the board is as follows:
RPWM: Forward level or PWM signal input, active HIGH
...
0
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1answer
161 views
Can I drive a Low-Side MOSFET from a High-Side Driver?
I'm working on a power electronics project where it involves driving 4 different MOSFETs, (3 HighSide and 1 LowSide). Rather than using a different IC for the LowSide driver, I am thinking about using ...
0
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2answers
86 views
Current sense amplifier for high voltage (100-150V) low current (20 mA) application [closed]
I have an application where I need to measure the current on a relatively high voltage rail. The problem is that the current on the rail is quite low, only about 20 mA.
Because of the high voltage, ...
1
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2answers
376 views
H-bridge low side current sensing: Current signal with oscillation why?
my problem is the following: I am using two DRV8842 H-bridge ICs to control 2 different brushed DC motors, my intention is to use a PI controller for the current loop. The schematic looks like this:
...
1
vote
1answer
94 views
IR2133 Bridge driver not working as expected
I want to use the IR2133 to drive a mosfet rectifier. I have setup as in the circuit below
The probelm is (take first high side fet as example) that the signal that appears on HO1 is exactly the same ...
0
votes
1answer
67 views
Low-Side Switch MOSFET Drain Voltage Drop in OFF state?
I'm trying to replace a normally open switch with a low-side switch mosfet. The drain of the mosfet is connected to an input pin of a non-modifiable 3.3V MCU.
Prior to my changes to the setup the ...
0
votes
1answer
170 views
high side vs low side current sensing in isolated bench power supplies, does it matter?
I'm trying to make a couple of mains isolated, transformer based, bench power supplies. Considering that the current sense resistor will be in the PSU box and external loads will not have access to ...
