• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 797 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

1.5V AA to 6V boost converter design

subramani kp
Prodigy 30 points
Other Parts Discussed in Thread: TPS61089, TPS61088, TPS61033

Hi

I am looking for a solution that has Boost converter 

Vin:    1.5V

Vout:   6V, 1A ( to be connected to Vm of Motor driver IC)

Since it is a AA cell operated device, we would like to keep Quiescent current low.

I saw in the web bench, but could not find a suitable boost converter.

Kindly see if any proven design is present.

Appreciate in advance

regards

subramani

  • 0
    TI__Genius 12495 points

    Hi Subramani,

    Thanks for using e2e.

    You can choose TPS61089 or TPS61088, but both of these two devices can't support vin < 2.7V, so you need add an extra pre-bias circuit to make the device can work normally when VIN=1.5V, you can this app note as reference. 

    www.ti.com/.../slvaf89.pdf

    But the iq of these devices are a little large, I am not sure if you can accept it... Or if you can accept 5V output voltage not 6V, you can also choose TPS61033, the iq would be smaller, but the pre-bias circuit is always needed.

    Regards,

    Nathan