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Hello,
I have attached the various waveforms I tried and also the routing of DC2DC Section (Bottom is mirrored so that understanding of routing can be easy in image)
1702469674
Signal shown as "Expected Signal" is only for reference. I am ok with the rise time of output I am getting
I have designed a DC to DC that has input of 12 to 18V and output at 8.5V.
Following is the schematic used
I am getting the desired result but when I measure the output, I am getting the following result
The output rise isnt smooth as expected.
What could be causing this or am I doing...
I have a a board that has a FPGA & a MCU and both communicate with eachother.
MCU works on 3.3V & FPGA needs 3.3V, 2.5V & 1.8V
I have used resistors on all connections between FPGA and MCU as given in image.
Are they really needed? Cant I just short them all (this would save a lot of space on...
Hello,
What kind of circuit do I need where in, I can use USB for charging a li ion Battery as well as use the USB device (For Data Communication) at the same time.
I have used a regular USB device circuit. It all works fine but when I connect the cell with charging circuit to VBus, the...
I need to power a device which operates at 3.3V/150mA to 200mA using IO pin of a MCU (HIGH = 3.3V)
I will turn on the device only when needed else it will be OFF
I tried with PNP as high side switch but it doesnot work as Ve = 3.3V and when mcu IO turned high even Vb will also be 3.3V and I...
I am using the below schematic to drive the backlights of the display. Also given are backlight LED specs
While using this, I see a lot of flickering and the IC and inductor also gets heated up.
Have a chosen a wrong part or am I missing something in the design.
I am using renesas mcu... usb as a device.
I want to also use 5V from the usb to charge a Li ion cell... there will be a charging circuit ofcourse
1602601785
Computer host --> usb cable --> mcu (usb device)
I also want to use vbus line to be used as power to charge the cell (Li Ion)
Will a connection for USB work if used as follows
USB VBUS pin --> VBUS of MCU and also used for Charging
D+ --> D+ of MCU
D- --> D- of MCU
GND
I want to use VBus line for USB detection as well as use the power for charging at the same time
Transient response will tell me the ability of ldo to hold its output voltage when theres change in load current connected to that output.
My concern is the input to the ldo... because this input drives another load which can cause drop or variations in the input voltage that is given to the...
How would the output of LDO (1117-3.3V) effect/change if the input voltage fluctuates. Will the output be stable enough?
I am using a input voltage of 9V (This can fluctuate a lot as I am connecting it to a thermal printer power which causes this fluctuation during printing only due to...
All the shield has to be ground... via a resistor and cap in parallel as shown for ethernet and serial.
I have unfortunately connected usb directly to ground... probably missed it
Power ground point in the return path
He again I needed to have a parallel resistor and cap for shield which I...
I have 4 connectors
1. Power
2. USB
3. Ethernet
4. USB
All placed in a proper straight line so that when placed in a enclosure, the same are properly flushed.
The body of the connector (Shielding) is done for each of them via a 0.1uF and 1M Resistor to GND.
The outer casing (or the part...
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