Questions tagged [push-pull]
A circuit that uses a pair of active devices (such as complementary transistors) to alternately source current ("push") to or sink current ("pull") from a load.
257 questions
1 vote
1 answer
126 views
Pull-pull and push-push amplifiers
I know about push-pull amplifier stage, but recently I came to know additional configurations like push-push and pull-pull stages, from a question I was solving. But couldn't find any sources about ...
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1 vote
2 answers
163 views
How to design a circuit to level-shift a 3.3V MCU output to selectable push-pull or open-drain outputs (3.3V / 5V / 12V / 24V)?
I need to design a circuit that can take a digital output from an MCU (3.3V) and amplify it to a selectable output voltage. The output voltage should be configurable between 3.3V, 5V, 12V, and 24V. ...
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2 votes
1 answer
159 views
Push-pull along with pull-up
A FPGA I/O is connected to the OE# of a transceiver and I want to ensure that OE# is high (>=2V) when the system powers up and until the FPGA is configured. The system is battery powered and the ...
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1 vote
3 answers
118 views
Can I use the output of a push-pull inverter as a digital input on a STM uC, or does it have to be a open-drain inverter with pull-up resistor?
I want to implement some buttons in my controll scheme to controll the operatings of the system controlled by a NUCLEO-H723ZG uC. For the switches i will be using ones actually rated for 230 V AC, ...
- 123
0 votes
0 answers
56 views
How can I reduce the turn-off spikes in a push-pull converter?
I’ve designed and built a 12V–360V DC-DC converter. The circuit has just been powered up and is under testing. The output is stable at 360V. I had to damp the RCD clamp with an additional RC snubber, ...
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5 votes
2 answers
505 views
Is it possible to check the deadtime of a push-pull converter without soldering in the transformer?
I have designed a 12V–360V push-pull converter. I would like to power it up with the least possible risk. I want to make sure that the LM25037 PWM controller and the FET driver circuits are working ...
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1 vote
2 answers
150 views
CMOS 4022 feasibility to divide by smaller integer using only simple R,C combination to reset?
The CMOS CD4022 is a divide-by-8 counter with 8 decoded outputs, pinout attached below. Now suppose I want to use the 4022 to divide by 4 instead of 8. Can I just put a capacitor from the '4' output ...
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1 vote
0 answers
56 views
Could this system become unstable when operating in DCM mode?
I’ve designed a 12V-to-360V push-pull converter that will operate in both CCM and DCM modes. In CCM mode, the system’s transfer function is completely fine, but I have some concerns about DCM. When ...
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1 vote
1 answer
81 views
Should I route the CS and Feedback lines as quasi-differential pairs?
I'm designing a galvanically isolated push-pull converter. My issue is that the current sense resistor and the optocoupler (opto-isolator) are located relatively far from the LM25037 controller. My ...
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4 votes
1 answer
294 views
Is a 4 cm CS trace to the LM25037 acceptable if routed on an internal layer under a solid GND plane?
I’m using a current transformer for current-mode control in a push-pull converter. The current sense resistor is placed next to the current transformer. However, the LM25037 controller is located a ...
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4 votes
3 answers
745 views
High distortion in push pull amplifier
I am using a voltage to current converter to inject a current in a load, that is proportional to a voltage that is being generated on an MCU. The goal is to generate a sinusoidal current signal of ...
4 votes
2 answers
426 views
Where should the current transformer be placed?
I’m designing a current-mode controlled push-pull converter, where current sensing is implemented using a current transformer. My question is: am I correct in thinking that the current transformer ...
- 1,203
2 votes
2 answers
256 views
Anyone tried small transformer to apply drive to the upper or highside? MOSFET in push pull so can use 2 N-channel MOSFET rather than a P-channel
Anyone ever tried small transformer to apply drive to the upper or highside? MOSFET in push pull say for a square wave oscillator so can use 2 N-channel MOSFETs rather than a P-channel Is it really ...
- 261
0 votes
0 answers
89 views
Why is the simulation failing in SIMPLIS?
I'm still working on designing my push-pull converter, for which I’ve already managed to determine the open-loop transfer function in this question: How can I measure the transfer function of a push-...
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2 votes
1 answer
126 views
Calculating the SMPS input capacitor when the source impedance is unknown
I’m designing a push-pull converter (still). I have determined the required input capacitance (5600 µF) for a given input voltage ripple (100 mV). The formula I used was derived from the calculation ...
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