555 alternative / need 500V DC square wave 1mAmp

[Erwin Maes]

Hi,
are there alternatives for the 555?
I need 500VCD at 1milliAmp (square wave 150kHz)

thanks for any suggestions!

 

[Tim Wescott]

Erwin Maes wrote:

Hi,
are there alternatives for the 555?
I need 500VCD at 1milliAmp (square wave 150kHz)

thanks for any suggestions!

I'd consider a 555 and a high-voltage amplifier, if the 555 were precise
enough.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

 

[Erwin Maes]

Mark Jones wrote:

Tim Wescott wrote:


I'd consider a 555 and a high-voltage amplifier, if the 555 were
precise enough.

No, it has rise and fall times of 100nSec. I need 10nSec....


* Hmm, how "square" is "square?"
10nSec up and 10nsec down...
* Is 500vDC being driven into a Z=500k load (1mA actual peak current?)
At this V and F, stray capacitance and inductance may distort the
waveform, depending on the source impedance.
* Also, what is the limit on supply current? Higher allowances can yield
better performances.
It's fead by 230VAC, so plenty of that I suppose ;.)

Pick any two: High Speed, High Voltage, High Resolution...

 

[Winfield Hill]

Erwin Maes wrote...

I'll check out the design and see if I can first make a scaled down
version that only needs about 24V at 100nsec rise and fall times.

What are you trying to make? You can use 600V half-bridge FET
drivers to get a 40ns rise-fall performance with a 500V swing.


--
Thanks,
- Win