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At first you should determine switching period. next you should determine maximum inductor current ’Ip’ from waveshape. Ip is indipendent of periode ,T, it depend to Iin(that deviated from input power and input voltage) Ton in most cases is seted about 0.4T it should determined in respect...
hi
i have designed some switching power supply succesfully in the last but now should design above power for a big factory to manufactureing in large amount any ps fault would introduce a cost about 40$ and ps should sustain any tribble condition like termal, moistur, suden line voltage or...
hello
i need to know about prob socket pinout in "utd-300 d"
model and its related wire color.
related planet link:
Fetal Doppler UDT-300D - BRAEL - Medical Equipment
with best regard
bootstrap IC fault immediately
lowest freq that i want to do is DC frequency for DC old motor that change rotation side by a fullbridge dc inverter that only change polarity of applied voltage
hi
when replace magnetic driver by bootstrap IC, it faults immediately what is the resons and how can I to solve it?
are this technic useable for very low frequency?
with best regards!
hi
i have some problem using bootstrap IC IRF21XX series they fault immediatly after input voltage connection, other part are OK it works well by a ferrite pulse transformer.
please help me by application note or other text or neccessary practical notes :roll:
thank
hv ferrite transformer
i want to assemble a HV ferrite transformer below 5kv & need some refrences for related standards and insulation and precautions plz help me
buck diode
hi
i am producing a buck regulator switching power supply in 200kHz the input is constant 375V DC and output sould have variable current output from 50mA to500mA the main diode is her307 T(on) of diode is very high for this aplication because of extra high reverse bias voltage and...
firing circuit using mosfet
you should connect Vo op amp to totempole circuit that contain 2 transistor after it you should connect tow emitter by resistor to the gate of mosfet toprotect 2 transistor from second break
in totempole a pnp &a npn are conected together from emitter and base...
diode rating
in high temp Vf drop and dissipation became lower repitive on/off increase the dissipation
its temp increases 11°C per watt of dissipation from invironment and 150°C is a safe choice
0603 resistor parasitic inductance
gs can replaced by capinthis value:
Cin= Cgs{Ciss} + Cds{Crss}×(Vds (off)/Vgs)
then in lab you can see resonance of Vgs by scope &and all un expected parasitc condition after it Rgs and Rg can be selected truly
finally replacing the cap by MOSFET confirm...
irf840 buck -datasheet
thanks
but notice to that i used irf840 now and it have no any problem by it in previous after it there is only 0.5A in output it shoulde be a big problem in project
coupling factor air core transformer
if your examination wherenot in no load conditionincreasing frequency add impedance of transformer and decraeses voltage drop in leakage impedance of both side and resistor impedance but i am not sure
diode connected mos transistor
hi
in most of commertioal mosfet body or substrate is conected to source and in drain to source there is a p-n junction it is not very fast and have about 1000ns trr
for most switching application a parralel diode is added to it inherently that have fast...
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