Questions tagged [integrated-circuit]
An integrated circuit (IC) is an electronic circuit built onto a single plate of a semiconductor material, normally silicon. Modern ICs may contain billions of transistors and they have played a major part in the miniaturization and performance improvements of modern electronic systems.
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IC to detect when connected to DCP vs SDP/BQ24392 Wiring Help
I'm designing a device using the MCP73871-2CC, which I would like to be able to vary its charge rate via the SEL pin. For this purpose, I think that an IC would be needed that could detect the ...
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What affects the unity-gain bandwidth (UGB) of a symmetrical OTA?
I am trying to determine the sizing of transistors in the OTA as shown below. A strange thing I found earlier was that a small output impedance of M5 would cause a much smaller GBW than designed, as ...
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Does this IC have an optocoupler and a triac built into it?
I am trying to use triac to switch an AC signal using a DC input on the gate terminal from a microcontroller. From my understanding you need a optocoupler when the DC to AC levels vary by a bit. So I ...
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Current limiting in a ESC
How is current limited in high-power circuits such as ESCs, considering that they might provide tens of Amperes of current?
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Do I need to pull up the inhibit pin on the TLE7469?
I'm looking to use the TLE7469 to provide my board 3.3V and 5V. I'll be powering it with 24V. My specific question is about the Inhibit functionality of this part. It says that it has an "...
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How do I identify suitable ICs (for JTAG multiplexing)?
I'm quite a rookie in the hardware-electronic field so please bear with me. I want to create a multiplexer for JTAG with 1:16, so one input and up to sixteen outputs. Actually I only want to flash the ...
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How do you use a DAC IC?
I'm attempting to use a DAC0802 chip from Texas Instruments, but I can't figure out why it's not working.
Before anyone asks, yes, I've read the datasheet.
Below I've added a diagram of the voltage on ...
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Help me find a PWM IC (DP91 1L15 marking) [closed]
I found this 6 pin PWM IC in one of the SMPS. I am unable to find any of its details on Google. Can anyone help me find the name of the device?
The marking is something like ...
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IC identification - Analog Devices IC with top marking S 0Z - 10 pin SMD IC
I need help identifying this 10 pin SMD IC with just "S 0Z" as top marking.
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Passing generic DC load through USB pin on BQ2403 IC
I'm looking at this (BQ2403) Li-po charging IC and am wondering if there is any reason I couldn't pass a 4.2v DC load through the USB pin instead of straight USB. I feel like this is dumb, but I'm ...
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Is there any way to mount a DSBGA package IC on a breadboard?
Is there any way to mount a DSBGA package IC on a breadboard and test it? It does not have pins that normally fit in a breadboard. Instead, there are small spheres on the bottom of the IC which are ...
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Why is the Vcc pin almost always next to the GND pin?
I have went through numerous times where the Vcc pin is shorted with the GND pin causing damage to the entire microcontroller, for example, pins 3 and 4 and pins 5 and 6 in the ATmega328P :
Image ...
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What is this component and what function does it serve?
I am learning to build a touch switch using a TRIAC. I took apart a commercial switch that is activated by touching the thin white wire.
I identified all the components, except one (the one that I ...
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Alterning LED's in breadboard with timer 555, 2 circuits doing the same but i don't understand one of them
I am working on an alternating LED circuit. Initially, I implemented it following the circuit shown below.
From this circuit, I understand that the capacitor discharges from R2 to the discharge pin (...
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Have I completely broken this chip?
I unsoldered all the connections from the bottom of the chip (ta8229k) but unfortently I was abit overzealous with trying to wiggle it off using the heat sink and its ended up snapping the top of chip ...
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Can you use a charging IC to monitor charge and discharge current (or just charge?)
For my project I would like to incorporate coulomb counting/current measuring so I can calculate the SoC and capacity of batteries. However, I am not sure if you can monitor the charge and discharge ...
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What happens if an electronic device only uses 20 mA, but the power supply gives 700 mA? [duplicate]
I’ve recently been wondering if my IC would get fried if I have a 700 mA power supply? Since the IC only needs 20 mA.
Also I don’t understand resistance in Ohm’s law since I didn’t put any resistor. ...
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Can I increase the voltage coming out of an IC pin? [closed]
I have a PCB with an IC TLE8209 - 1E, the out1 pin of this IC has a voltage of 11.50 V. However, I need at least 12 V to be present in this out1 pin. Here's a simplified schematic of the PCB with the ...
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How to remove glued IC chip from PCB?
I used rework station hot air to 360 degrees Celsius for 3 minutes and the IC didn't come off! I hope I didn't damage it for prolonged heat exposure. Then I found out the IC is glued, I couldn't find ...
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Cannot identify IC component marked EN=8D T3T on board
So, I've come across a component on a board and having trouble identifying it. On the PCB, the reference designator is a "U", so I'm assuming it is some kind of IC however other component ...
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Remelt/dissolve waterproofed circuit board epoxy
I'm trying to fix a washing machine. Its circuit board is embedded in epoxy to waterproof it. Its been sitting in 100+ degree heat and the error code resolved, leading me to think thermal expansion ...
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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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Need help identifying DFN-8 Part
I've got an 8 pin DFN-8 package I can't seem to identify. Things I know:
Its a DFN-8 2mmx2mm
Its got a large pad underneath
Pins 2 and 5 are connected to the GND on the micro-usb connector on the ...
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Please help identify this SMPS IC
I need to repair a charger for an e-bike. The model is SHC-8100L made by stchargers.com.
The unknown IC (marked U1 here, a 3x2 mm SMD IC marked 71427) seems to be faulty.
Input voltage seems to be on ...
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How do you make M2 Ultra with lithography?
The M2 Ultra chip is unusual not because it's a single chip made of two halves, but because the halves are centrosymmetric images of each other instead of translation. Assuming the wafer is exposed ...
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What would cause a ticking sound and oscillating DC voltage on a SMPS based circuit board?
I am trying to fix a Wakins PN 1182201 REV E board. It's from a IQ2020 spa control system (approx 2008 era).
The system came in for repair as the system was accidentally sprayed with a jet washer.
The ...
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Spec sheet diagram re: NEC u7225PD LCD Driver (14 segments)
This question is in regards to figure 6 of the uPD7225 Programmable LCD Controller/Driver data sheet. My use case is typical: a 14 segment driver clocked at 147k in divide-by-four mode.
From the ...
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Boost converter TPS61040 output voltage higher than expected
Based on the datasheet of TPS61040, the output voltage of this boost converter is
$$V_{out} = 1.233V (1+\frac{R_1}{R_2})$$
Picture edited to show output capacitor
The input voltage is from USB which ...
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I need datasheet for a 4 pin optocoupler marked 817C E172H
It is used in an automotive vehicle power conversion board. I am trying to service the board but I don't know the exact manufacturer. I have added the IC image. Its dimensions are 6.7mm X 4.7mm X 3....
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Delay of a custom designed FA
The documentation about transistor delay presents a couple of picoseconds.
An AND gate of several transistors could be made to be about 3XTransistor delay - 10-20 Picoseconds (theoretically).
When ...
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What driver can I use to convert a 24 bit Parallel RGB signal into SPI or MCU?
I want to convert a 24 bit RGB signal into a SPI or MCU interface to drive a small LCD.
I have a circuit that I have created that has dedicated video memory and is connected to a small circuit that ...
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I need a datasheet for an IC of 8 Pin 3*3*0.9 dimension with Top marking 20042Q Q2KK46 2N1B
I need datasheet for this 8 Pin IC with top marking 20042Q Q2KK46 2N1B and its Dimension is 3*3*0.9. This IC is used in automotive vehicle Power Conversion Module.
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Delay in cycle while making 3-bit up/down counter
simulate this circuit – Schematic created using CircuitLab
I am trying to make a 3-bit up/down counter, after failing to use xor IC I resorted to AND and NOR ICs, but the result of the IC starts ...
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How to test photo interrupters
I have come upon two photo interrupters in a calibration kit circuit. The circuit seems to not respond. How can I check these photo interrupters? The green LED is responding when an object is brought ...
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I need a datasheet for an 8-pin IC marked 206 5128A3GX
I want to know what this IC is and its manufacturer name. It will be useful if you also let me know how you found the datsheet.
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How to identify an integrated circuit without its datasheet?
I'm not sure if this is the right forum for the question, but I'm not sure where else to go.
Recently, an electronics component distributor from where I live (Cordoba, Argentina) has discarded some ...
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Analog Devices M5L package
I have an IC in a 10-pin MSOP package, labeled M5L. I don't understand what it is. See the lower left area in this picture:
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What is the average length of interconnect wire that needs to be charged/discharged per floating point operation?
Problem setting
I'm interested in estimating an upper bound to how many floating point operations (FLOP) can be performed per Joule of energy dissipation on existing digital CMOS hardware. To do this, ...
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Magic "JFN8-1“ IC - IC Identification
I've been searching for weeks now and haven't found an answer.
Goal:
Identification of this IC:
JFN8-1 GA167003
What it does:
If you press the button, it generates a "buzzing" sound to the ...
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Identifying chip used in motion-sensing light
I'm trying to draw out a schematic by probing a PCB for a motion-sensing LED light, and I see this 14-pin (SOT-14?) chip shown below. The manufacturer seems to be MicrOne, but their page for the ...
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How can I measure the frequency of multiple square waves?
I'm trying to evaluate the frequency of 18 independent sources of square waves in my system (the signals are generated independently as feedback.) Basically, I need to have a way to use one ...
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Can you help me to identify this IC?
I need help to identify this IC:
Context, truck gate driver:
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How does Vds affect the overall transconductance of this OTA?
I am trying to determine the sizing of transistors in the OTA as shown below, using the gm/id methodology. I wanted gm1 and gm2 to have much larger gm than the other transistors to reduce noise. I ...
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Can anyone identify what this is inside this IC?
So I attempted to decap an IC using the approach shown here https://youtu.be/SWX-s-Obkc0 using a hot air rework station. That seemed to work but what I found inside doesn't resemble a circuit of any ...
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What controls battery discharge? Can you use a transistor to lower the amount of battery capacity used?
What controls battery discharge? I want to be able to save battery capacity by using a transistor to amplify current but don't know how current even would flow from the battery in the first place.
Is ...
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Driving a 3x3 RGB LED matrix using programmable IC
I am looking to build a 3x3 RGB LED matrix with individually addressable LEDs as a form of user interface.
I do already have a micro controller available but want to use it only as high level ...
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Identifying and accessing files on a TK800 Smart display car key
I've bought this Chinese TK800 smart car key from Aliexpress and it seems that they have locked it and I can't access the files from a PC via USB.
I'm trying to add or change a car model image from ...
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Can anyone identify this IC on an RGB cross-fading circuit?
Q1 is an IC. I just used that symbol as a placeholder. So all this chip does is gradually brighten and dim each of the LED lines, in overlapping intervals. So red brightens, then as red dims, green ...
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How do I factor the impact CDS has on the charge required by my gate driver to charge CGD during the miller region of the turn-on of a mosfet?
So as I understand it, with a resistive load, when the voltage at the gate relative to the source is increasing from VTH to VGP, it seems that the value of VGP is the voltage at which the current ...
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How does the thermistor activate/not activate a circuit?
I have this schematic which is temperature-dependent and would only make a sound once the heat detected is above the threshold of the NTC thermistor.
Can I get some help with circuit analysis?
How ...
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