267 Threads found on edaboard.com: Bipolar Current Current
Full bridge switcher is the usual topology for bipolar peltier supply, it's usually simpler to design it for symmetrical current although dick_freebird is of course right that heating current demand can be expected much lower than cooling current.
I have implemented a (...)
Power Electronics :: 03-09-2017 07:15 :: FvM :: Replies: 20 :: Views: 1247
I have a lateral bipolar design. how do I plot the graph for Ft, Fmax Vs collector current density (Jc)?
the tool I am using is sentuarus TCAD.
please help me with the script for this plot....
Electromagnetic Design and Simulation :: 07-12-2016 08:58 :: Beloni :: Replies: 0 :: Views: 504
I am using dspic30f5011 controller and I can generate PWM wave by using output capture compare module.Now,I want to control the 4-wire bipolar stepper motor with PWM i.e, rotation speed.So,what driver I have to use?
Thanks and Regards,
M SAI KIRAN.
Microcontrollers :: 05-11-2016 08:59 :: saikiran@ees :: Replies: 16 :: Views: 1242
Your schematic appears to be a flyback. current flow in the secondary is normally in one direction. This means the output stage is designed differently than the conventional tapped secondary bipolar supply.
Example, this arrangement:
Power Electronics :: 06-06-2016 17:53 :: BradtheRad :: Replies: 2 :: Views: 1208
I presume standard 5V transceivers, although specified only for 4.75 to 5.25 voltage range will work well at 4.5 V.
Cheapest are bipolar devices like SN75176, but they have uncomfortable high quiescent current. My standard general purpose transceiver is CMOS SN75LBC176.
Microcontrollers :: 05-07-2016 11:47 :: FvM :: Replies: 2 :: Views: 424
A buck-boost inverts supply polarity. Output is referenced to ground. That will give you -12V. You can use an ordinary buck converter to get +12V. Then you'll have bipolar +-12V, both referenced to common 0V ground.
Analog Circuit Design :: 04-08-2016 14:49 :: BradtheRad :: Replies: 4 :: Views: 671
The input current of an opamp that has bipolar transistors on its inputs is very low. They are made so that the input bias current does not change with voltage or temperature changes.
An opamp with Jfet or Mosfet inputs has NO bias current, instead it is extremely low (...)
Analog Circuit Design :: 03-22-2016 03:53 :: Audioguru :: Replies: 10 :: Views: 1384
Do you have a 150V supply to generate the pulse from or are you asking the whole thing to run from 5V?
If you have a high voltage supply already, all you need is a suitable bipolar transistor or MOSFET and a load resistor.
If you need to generate te high voltage from 5V, please tell us how much current you need to provide to your load and (...)
Analog Circuit Design :: 03-06-2016 20:40 :: betwixt :: Replies: 3 :: Views: 937
An ordinary bipolar transistor needs a base current of 1/10th the collector current for it to saturate well and not get hot.
Hobby Circuits and Small Projects Problems :: 02-08-2016 23:24 :: Audioguru :: Replies: 17 :: Views: 1431
BLDC's often use dual full bridges like a DPDT switch which reverses polarity of single supply or applies zero current with both at V+ or both at 0V.
Usually each bipolar or "Double Throw" switch or " half-bridge" is a MOSFET pair.
A full bridge switches both ends of the coil.
There are tons of BLDC web links.
Microcontrollers :: 12-24-2015 18:50 :: SunnySkyguy :: Replies: 5 :: Views: 515
It can sink more than source. 10 vs 3mA
"Minimum pull-up resistor of 500 Ω, from VCC to VIOUT |
"RL VIOUT to GND 4.7 kΩ" (min)
typical bipolar (BJT) specs are asymmetric.
Analog Circuit Design :: 11-02-2015 19:13 :: SunnySkyguy :: Replies: 2 :: Views: 446
Your schematic does not show Mosfets that have drain, source and gate pins. instead it shows ordinary bipolar transistors that have collector, emitter and base pins.
Elementary Electronic Questions :: 10-31-2015 00:16 :: Audioguru :: Replies: 5 :: Views: 715
This depends on a few things.
For bipolar mirrors, you'd need base current buffering
to keep any decent fidelity (figure each dependent
"steals" 1-2% of pilot current, as does the primary).
Then buffering puts you down to sub-%-per-stage.
Beyond that you probably need more gain and replica
feedback to get (...)
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 10-23-2015 15:30 :: dick_freebird :: Replies: 2 :: Views: 618
Theoretically they don't have reverse recovery (no minority charge carriers), practically they have non-linear junction capacitance which causes a current waveform that isn't very different from a bipolar junction diode. See also this previous thread
Power Electronics :: 09-06-2015 15:53 :: FvM :: Replies: 4 :: Views: 1043
L298 is old bipolar technology with limited efficiency. In so far it surely won't stay cool. There may be a problem of irregular (too fast) switching, you should check the waveforms with an oscilloscope.
In most SM applications that require hold current, the current can be reduced. This is possible by (...)
Microcontrollers :: 08-19-2015 21:17 :: FvM :: Replies: 6 :: Views: 955
MG150Q2YS40 specifications are based on a bipolar +/- 15V gate drive with 5.6 ohm gate resistor, considerable different from what you have planned. It's however a 150 A IGBT module and good for several 10 kW, a bit oversized for a 4 kW inverter.
Power Electronics :: 08-02-2015 20:30 :: FvM :: Replies: 19 :: Views: 1165
I would think load dump suppression devices should be satisfied with a bipolar TVS and conducted noise improved with low ESR C on input or series choke.
A LISN (50Ω/5?H) is used for AC power line conducted emissions measuring voltage for AC line external connections.
Battery conducted emissions , can be done with a current (...)
RF, Microwave, Antennas and Optics :: 07-28-2015 00:25 :: SunnySkyguy :: Replies: 3 :: Views: 623
Without getting into too much detail , understand that your Tx is bipolar signals but this chip uses an Rx threshold of +1.6 +/- 0.8 with hysteresis , approximately and can only supply 2mA if the RS-232 load is zero.
The source and load impedances of RS-232 are designed often with 1k source and 10k loads. So 2mA load will cause transient dips in
Analog Circuit Design :: 07-15-2015 17:39 :: SunnySkyguy :: Replies: 8 :: Views: 782
You are looking for resistance rather than "impedance". Rb has been used with classical bipolar OPs to cancel the addional offset caused by input bias current. As already mentioned "input balancing" could mean a lot of different things, I won't use the term here. Rb = Ri||Rf is the right value. In case, I would talk about source resistance (...)
Analog Circuit Design :: 07-02-2015 07:17 :: FvM :: Replies: 8 :: Views: 522
It all depends on the ESR and load current requirements.
555 can drive so many hundred mA with mV drop which implies the ESR of the driver.
typically 10 Ohms and is related to power handling capability of drivers or RdsOn or Rce of bipolar drivers.
YOu can get as low as 1mOhm ESR on high current half (...)
Hobby Circuits and Small Projects Problems :: 06-10-2015 16:55 :: SunnySkyguy :: Replies: 15 :: Views: 1346