TPS546A24A: ADDRESS SELECTION

SATHYA SHREE S 

Table 7-14 and 7-15 outline the selecting of the PMBus Address 

https://www.ti.com/lit/ds/symlink/tps546a24a.pd#page=42 

7-14 outlines the selection of the resistor divider code to select the SYNC Configuration (In/Out) and the Interleave Option, if it is a single-phase device.

If you are only using a resistor to ground, then the divider code is "None"   Which selects Auto-detection of Sync In / Sync Out with 0 degrees of phase shift and PMBus Addresses from 10h (16d) through 1F (31d) 

Table 7-15 outlines the selecting of the resistor to ground code for a specific address depending on which "range" was selected by the divider code.

So, if you want to select address 1Ah (26d) with no divider  (range 16d - 31d) follow the middle column in table 7-15 down to 1Ah (26d), and you will find that this requires a resistor to ground code of 10.

Tables 7-17 covers resistor to ground codes 0-7 while Table 7-18 covers resistor to ground codes 8-15

The resistor to ground codes are horizontally  across the top, with the resistor to ground value, in Ohms, directly under it highlighted in yellow.

Continuing with the example from above, Code 10 lists a resistor to ground of 31600Ω or 31.6kΩ

The resistor values below this highlighted resistor to ground value are the top resistor values to select the Resistor Divider code listed on the far left.

For example, if you wanted to configure the single phase converter to SYNC_IN with a 120 degree phase shift, you would select resistor divider code 4 under  resistor to ground code 10.

Following the top resistor values under code 10 down to divider code 4, we find a top resistor value of 48700Ω or 48.7kΩ.

If you want to select an address between 20h and 2fh (32d - 47d) you will have to use a resistor divider.