Inverting Charge Pump IC for -100V Output

sakthivel s

Other Parts Discussed in Thread: TPS40210

Hi

I have made a DC-DC converter circuit using TPS40210 to get 100 V with 100 mA output. Am using this to power an op-amp.

My op-amp is being used as a square wave generator which is driving a piezoelectric device. In this circuit my +Vsat is 100V and -Vsat is GND.

I need to provide a -Vsat of -100V. To do this i planned on inverting the 100V DC-DC converter output.

While searching the internet i came across inverting charge pump/ switching capacitor voltage converter ICs. The ICs I found can provide an output of -32V only.

Can you please suggest an IC which meets the said requirement.

over 10 years ago

0 JohnTucker over 10 years ago

TI__Guru**** 191445 points

You might consider using the TPS40210 to generate a split rail supply of +/- 100V using this technique:
www.ti.com/.../slva369a.pdf

0 sakthivel s over 10 years ago in reply to JohnTucker

Intellectual 620 points

Sir,
i already made circuit for achieving positive 100 V. So instead of making a new circuit, in that circuit itself what modification i have to do to achieve +/-100V.

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Inverting Charge Pump IC for -100V Output