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I have an application where in I require 1000 V DC from a 12 V battery. Is there any fly back or multistage boost converter available to achieve this?
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In reply to Garrett Roecker:
In reply to Getssy prathiba:
Could you please let me know what can be the maximum current possible with a standard design?
Best Regards, Getssy
With such a high boost ratio there are typically several stages used.Boost + charge pumps, flyback with stacked windings, multipled SEPIC, are some of the topologies used.Output currents for a high boost ratio are usually in the 10's of mA range, or lower.
Please see http://www.ti.com/tool/PMP30104 as an example.A SEPIC converter is used to charge a load capacitor (up to 15000uF) up to 400V/420V (selectable).The input voltage range is 15V +/-10% and the constant output charging current 80mA.The multiplied SEPIC topology has several advantages compared to Boost + charge pump mainly thanks to reduce peak and RMS currents in the multiplier of the SEPIC.
http://www.ti.com/tool/PMP20212 This low current boost converter implements a voltage doubler which allows a high input-to-output boost ratio.This design is low cost and requires an area of 16mm x 27mm.More stages of voltage doubler can be added to increase Vout.
http://www.ti.com/tool/PMP20183 This boost converter implements a voltage tripler which allows a high input-to-output boost ratio.The design is low cost and requires an area of less than 25mm x 25mm.
Finally, this PMP design is not public yet, however I will forward the details.PMP20899 is a 6-8.4Vin and makes 1500Vout at 20mA.It is a stacked flyback approach.Schematic, BoM, Test Report are attached.
There is not an example of 12V to 1000V in our archives, however the 4 examples above show the possibilities.
Ed WalkerTexas Instruments Online Support - Systems & Tools
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