How to make 76V from 38V

[mr_embedded]

Hi, this is probably a simple question but i need a supply voltage of 70+ V. The "start voltage" is a battery with 9V. I am currently using MC34063 from ST electronics (dc-dc step-up converter). This circuit delivers 38V output.

How can i step up the voltage further? Can I invert the 38+ (to 38+/-) or is there any other solution for this problem?

Grateful for all answers, mr_embedded.

 

[Prototyp_V1.0]

Are you planning to extend your already existing circuit, or do you plan to make a new one from scratch?

 

[mr_embedded]

It depends on the alternatives. If a better solution exist a new circuit is preferable.

thanks

 

[Prototyp_V1.0]

Hi.

My guess is that other pwm IC's is more suitable to do this.

Anyway, the datasheet tells you how to increase voltage and power output using external transistors: