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Hello
what is the best power supply design for low noise <100 uv
for analog circuit
LDO ? Opamp based PS ? Else ?
For example application:
Vin 5v
Vout 3v
Noise < 100uv for 0-200Mhz
It will be great also if you can forward me some links to read & learn about this topic
Thanks !
It's BLDC motor sorry for the confusion
The detection circuit i'm asking about should be connected to motor's 2 contacts in parrallel with the DRV output (as in picture above)
The detection circuit should detect when motor is disconnected from the DRV
But it also shold be protected/isolated from...
Hi
In idle state (motor connected but not rotating) it's connected in parallel to the DRV & to the detection circuit
Motor's impedance is Approx 3-4ohm
In rotating mode - same thing but now there is 7.4v PWM to the motor and following to the detection circuit i want to design (so i need to...
Hi
DRV8833 connected to BLDC motor with Approx 2A RMS & can reach to 4A at peaks
The DRV8833 controlled by MCU bu PWM when needed to operate the motor
In idle state (no motor, MCU in sleep) i need to detect the motor disconnection
Hi
I'm operating a DC motor at 7.4v using a motor driver
The motor connection to the driver isn't constant - it can be disconnected mechanically by the user
I need to detect this disconnection using MCU interrupt (don't want to wake & sense but to get interrupt when disconnection happend)
Some...
Re: Charging from USB wall adapters, how to control current & not harm the wall adapt
Hi Klaus
Do you mean to USB battery charging sepcification ? DCP, CDP, SDP ?
Are there dedicated Li Ion 2cell chargers with USB detection capability ?
Re: Charging from USB wall adapters, how to control current & not harm the wall adapt
I do not want to limit the customer to charge from 2A or 3A wall charger....
I want to be able to charge wise (dependng on the user charger capabilities)
Charging from USB wall adapters, how to control current & not harm the wall adapter ?
Hello
I have a battery of 2 Li-Ion cells = 7.4v
To charge the battery i use the MP26123 IC charger
I want to charge it from USB wall adapter
For that i connected a booster that output 10v to MP26123 input
The...
Hello
I want to develop something with voice messages
I want to record X messages - and play them when needed
I have some questions:
1. Where do i start from ? which IC to look for ?
2. How do i record & store the messages ? Do i need an external flash besides my internal controlles flash ?
3...
Hi FvM
Thanks for the reply
Can you please elaborate regarding the rectifier + filter ? if it is possible an example (diagram, specific component) will be very helpful !
AC will be rectified, what about DC input voltage - just less 2 Vf of the diodes ?
Do i need to ensure enything regarding...
Hi Andre
Thanks for the reply
I need one converter for both AC & DC, is it possible ?
Lets say i don't know which type & level of voltage input will be... i need to prepare for 12-24 AC & DC
Hi
I want do design a PCB that basically passes or stops the 12-24 AC/DC input voltage
I'm looking for the 5v Voltage converter (for MCU & other IC's) and for a Relay controlled by the MCU
A very high level block diagram attached
Any suggestions & tips will be helpful
Many Thanks
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