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Reverse Current Schottky Diode

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24 Threads found on edaboard.com: Reverse Current Schottky Diode
small signal schottky probably has less capacitance. Obviously also less current handling capability BAT54 is a small signal schottky that gets used in signal circuits commonly. Its oviously in a smaller package, so less space on the pcb. Of course, for really low capacitance, and really low reverse leakage (...)
Why not look at the extremely high leakage current of the 1N5817 schottky diodes on its datasheet? It's maximum reverse-biased leakage current is 20 thousand times higher than an ordinary 1N4148 diode. But a 1N4148 diode is in a glass package and is affected by light. The (...)
Hi, I need an assistance to chose the right diode values for protecting the circuite from reverse voltage and current protection. vin 12v, max forward current /consumption of the circuit can reach 7A. do i need to choose a 7A max forward current? can anyone specify example models? is it better to (...)
Hello. I'm in the process of designing my first offline forward converter and I am looking at secondary rectifier diodes and have some questions related to the characteristics needed. Like the current rating, I am going under the assumption that the DC output will be maximum 10A but the current going from the secondary winding to the (...)
as we know that whenever any device is connected across the battery , electrons from the -ve electrode flows towards the +ve electrode through the external ckt thereby passing current through the device connected. Now if suppose we connect a pn junction diode across the battery by forward biasing it , then electrons from n side moves towards the p
Hello, Do you know why this schottky has a reverse recovery time of 35ns?...schottkys are not supposed to have reverse recovery MBR40250 datasheet
The transfer characteristics of zener and pn diode looks same in reverse bias, i have asked few why in many rectifier circuits zener is used.i got answer like, it wont burn up in high reverse current like pn diode . why zener is special than pn diode.
***************************************************************** .MODEL BAS70 D(IS=3N N=1.06 RS=29 XTI=1.8 EG=.68 + CJO=1.55P M=.29 VJ=.36 FC=.5 BV=70 IBV=100n TT=25P) * ISR=2.5n NR=1k IKF=5m * for 27C reverse current simulation use: GMIN=.5e-9 * 17.12.1993 SIEMENS PD1 KURTH *****************************************************************
Hi, We wanted a reverse polarity protection for our ckt. We have below design. 103823 How much voltage drop we will get here? Please suggest the D4 and Q68 for 16A load, lower drop in voltage is preferred. Can you suggest any other ckt for better performance?
The diodes reverse voltage rating can be just above the + volt line, as the diode is normally reversed biased. As the current in the coil is switched off, the magnetic field collapses and tries to send the energising current out again, this results in the "earthy" end of the coil going more (...)
I don't guess about measuring artefacts without seeing the actual setup. I presume, you see the current peak at transistor turn-on? If the diode is a schottky as claimed in the schematic, there won't be a large reverse recovery peak, a few A might be observed nevertheless. A slow standard diode can (...)
Hello.can anyone tell me which diode is the best choice for reverse polarity protection(12v DC)?Can you mention its voltage&current spec?
22 kHz operation of slow reverse recovery diodes will involve a lot of switching losses. Peak current of the voltage doubler is > 1.2A and cause increased forward losses. I would use 3A/40V schottky diodes.
If a diode is glass then I take it to be a small signal type. If the volt threshold is below .6 or .7 then it might be germanium, schottky, etc. If volt threshold is higher than .7, then it could be for high voltage. I figure current limit is 3 amps or more if it is larger than 1N400x type (1 amp). As for reverse (...)
Dear all, I have bought the HSMS 286x series schottky diode. The breakdown voltage (Bv) is given as 7 V in the SPICE model of the data sheet. I have put the SPICE model into the ADS and run the simulation. I got a I-V curve. The imposed reverse voltage 7.07 V is corresponding to the current -1 mA. In reality, I (...)
Hey Emontllo, Can you please explain in details plz..... How does current flow through D1 when its reverse baised even if MOSFET is turned OFF...still it remains in reverse state. So please if u can elaborate it please. Thanks and regards Nikhil
Hi, It has more to do with thermal runaway because of the high reverse current in schottky diodes. More about this can be found in an app note from diodes: If you have time, connect a schottky with a small case size in reverse to a current limited powe
Answers are: 1-Yes 2-Yes but only if the module is an I2C slave (which is true in this case) 3-Yes but use a schottky diode with low reverse current (any small diode will work) 4-Yes, 3.3V is within TTL levels 5-Yes,you can use a bjt (place a resistor in series with the base for current (...)
That "step" is a combination of the miller plateau effect and the reverse recovery of the low-side diode.
I'm using tiny 2313. Can I source current (48mA) by paralleling micro pins? Try it. I don't see fundamental problems with this approach. Put a capacitor to ground to reduce the brush noise going back to the uC. As Nandhu had suggested, add a reverse diode in parallel with motor (it should be a schottky (...)