ZHCSQY3 march 2023 TPS546D24S
PRODUCTION DATA
Configuring a TPS546D24S device as a loop follower disables all pinstraps except MSEL2, which programs (37h) INTERLEAVE for stacking and (ECh) MFR_SPECIFIC_28 (STACK_CONFIG), (4Ah) IOUT_OC_WARN_LIMIT, and (46h) IOUT_OC_FAULT_LIMIT with a single resistor to AGND. Note that the loop controller is always device 0.
| RESISTOR TO AGND CODE | DEVICE NUMBER, NUMBER OF PHASES | IOUT_OC_WARN_LIMIT (A) / IOUT_OC_FAULT_LIMIT (A) |
|---|---|---|
| Short | Device 1, 2-phase | 40/52 |
| Float | Device 1, 2-phase | 30/39 |
| 6 | Device 1, 2-phase | 40/52 |
| 7 | Device1, 2-phase | 30/39 |
| 4 | Device 1, 3-phase | 40/52 |
| 5 | Device 1, 3-phase | 30/39 |
| 8 | Device 2, 3-phase | 40/52 |
| 9 | Device 2, 3-phase | 30/39 |
| 2 | Device 1, 4-phase | 40/52 |
| 3 | Device 1, 4-phase | 30/39 |
| 14 | Device 2, 4-phase | 40/52 |
| 15 | Device 2, 4-phase | 30/39 |
| 10 | Device 3, 4-phase | 40/52 |
| 11 | Device 3, 4-phase | 30/39 |
During the power-on sequence, device 0 (stack loop controller) reads back phase information from all connected loop followers, if any loop follower phase response does not match the (ECh) MFR_SPECIFIC_28 (STACK_CONFIG) results of the loop controller, the converter sets the POR fault bit in (80h) STATUS_MFR_SPECIFIC but does not allow conversion. After all connected devices respond to Device 0, Device 0 passes remaining pin-strap information to the loop followers to ensure matched programming during operation. Adding an additional phase requires adjusting the MSEL2 resistors on the loop controller device and the MSEL2 resistor to ground on all other loop follower devices.