Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
LED driver problem
it is a pulse current at the charge pump output end,this pulse current is used to sustain the output capacitor voltage which is decided by the feedback loop. the pulse current width is decided by the flying capacitor discharging with the power switch on resistance . normally...
your schematic is wrong , and you can not get the right reference voltage.
two loops in the circuit: postive feedback loop and negative feedback loop, but your OP is in wrong connection.
the negative feedback gain should bigger than the postive feedback loop gain.
in order the balance the...
Help me!!!
you know two method used about time in circuit:
t=RC, CV=It, normally people use CV=It to generate relatively constant frequecy slop wave. you can calculate your circuit's parameters
yes ,this is a good idea to fulfil your goal
two points you may take care of :
1) use R3/R4 as a voltage divider at the postive input of the OP
2) since the load current is 3A , so you can use a sense mosfet instead of a resistor directly sense the load current. the sense mosfet can use 1:N to...
research on ESD need a lot of device acknowledge, and especially power device. and you still have to understand some circuit knowledge. right now normally use ESD structure is very common. so you are hard to have some new findings in this field. the most common ly use ESD including diode and...
in the bandga reference ,the gain of two stages opamp is big
enough. and you do not need to care about the absolute gain of the opamp, if it is big enough(>60dB), because the opamp work in the closed loop. v1-v2 may equal to the offset voltage of the opamp, it may several mini-volts and this...
ESD protection
katrin ,
there are two person major in ESD design in innios and taiwan , another person ,is called :
''Ming-Don Ker'', you can also search his paper o the internet. maybe it is more useful
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
