• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 493 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.

TPS63001DRCR potential feedback damage

Chris Bonham
Prodigy 10 points
Other Parts Discussed in Thread: TPS63000, TPS63001, TPS63050

Hello,

I am currently working with an MSP430 that controls a TPS63001DRCR Buck Boost. The current setup is just as the datasheet describes:

with the following exceptions:

1. The msp430 is connected via the EN pin.

2. PS/SYNC is connected to ground.

3. 4.7 uH instead of the 2.2 uH

Also, an additional 3300 uF capacitor is in parallel on the output side which powers a peripheral device.  Now, during the testing phase, the peripheral device is not connected and the buck boost is tested (i.e. powered on).  After testing is complete, the 3300 uF capacitor holds a 3.3 V charge since it has no way to discharge until the peripheral device is connected.  Reading the datasheet it states the following:

So, am I correct in assuming, that having this capacitor charged at ~3 - 3.3 V (with no way to discharge) could damage the buck boost over a prolong period ?

Thanks in advance for any insight.

  • 0
    TI__Guru**** 150780 points

    No, that is the wrong way to read that spec.  That spec says what voltage the TPS63000 regulates its FB pin to.  You do not use the TPS63000 but instead TPS63001.

    The newer TPS63050 may be better for your application as it has a SS and adjustable current limit which would help in charging the cap.