Can anyone help to check the schematic of tpsm63606?
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.
For U6 and U7, there may need to be more output capacitance. I would suggest having 2 x 27uF on the output because DC bias effects on the capacitor will reduce the effective capacitance lower than expected. This is a good starting point and you can further evaluate for desired output ripple and load transient response.
For U5 (buck converter to inverting buck boost) please refer to this app note on design recommendation and guidance (https://www.ti.com/lit/an/snva856a/snva856a.pdf). The first thing I would look out for is the input to output conversion. In IBB the input voltage pin will experience voltage of VIN - ( - VOUT). If your output voltage is -15V, and the recommended maximum input voltage is 36V, then the input voltage can not be larger than 21V or else it will be above the input range. Also current drawn in IBB is larger than in regular buck, so your application will most likely not be able to draw 6A which is the max current rating of the buck converter. Refer to Section 4 for operating considerations when using IBB
Thanks for your reply!
According to the snava856a.pdf
In the datasheet, the maximum is 42V. Is this right? By the way, if the input is 24V and the output is -15V, what will happen? Also, if the input is 24V, can you recommend a chip which can output -15V and pin compatible with tpsm63606. Thanks!
The recommended input voltage is 36V while the absolute maximum voltage rating is 42V. The electrical characteristics and system characteristics in the datasheet follow recommended input voltage. Any voltage above 36V has not been tested in operation so it will be on you to validate and verify.
Unfortunately there are no current alternative high input voltage power module that may be appropriate for your application.
As such I would suggest getting the TPS63606EVM to validate and test for your application.