tps65070 wLED boost

Vsevolod Anisimov

Prodigy 240 points

Other Parts Discussed in Thread: TPS65070, TPS65070EVM-430

Greetings,

Can i use your wLED boost module as a simple DC-DC step-up converter (to have 12V)? What must be done for it?

Best regards,

Vsevolod Anisimov

over 13 years ago

0 Daniel Acevedo over 13 years ago

TI__Genius 17240 points

I'm looking into this. In the meantime, please tell me how much output current you need at 12V?

0 Vsevolod Anisimov over 13 years ago in reply to Daniel Acevedo

Prodigy 240 points

Maximum current will be nearby 35 mA.

0 Daniel Acevedo over 13 years ago in reply to Vsevolod Anisimov

TI__Genius 17240 points

The TPS65070 non-synchronous wLED boost converter is configured as a constant current source. In your case, and as the case with most of the shelf boost converters, a constant voltage is desired.
You could potentially, though this hasn't been tested, install a 12V zener diode where the LEDs would normally go and the ISET2 resistor for sufficient current for the zener to operate in breakdown ; you would then connect your load from the output ofthe boost to GND.
I recommend evaluating this on the TPS65070EVM-430.