ZHCSGE0B June 2017 – January 2019 TPS53681
PRODUCTION DATA.
The IOUT_OC_WARN_LIMIT command sets the value of the output current, in amperes, that causes the over-current detector to indicate an over-current warning condition. IOUT_OC_WARN_LIMIT is a linear format command, and must be accessed through Read Word/Write Word transactions. IOUT_OC_WARN_LIMIT is a paged register. In order to access IOUT_OC_WARN_LIMIT command for channel A, PAGE must be set to 00h. In order to access IOUT_OC_WARN_LIMIT register for channel B, PAGE must be set to 01h. For simultaneous access of channels A and B, the PAGE command must be set to FFh.
NOTE
IOUT_OC_WARN_LIMIT maximum default value is 255A. In case, Application maximum load current is greater than 255A, IOUT_OC_WARN_LIMIT needs to change as max load current value each time after power-on or RESTORE_DEFAULT_ALL operation.
Upon triggering the overcurrent warning, the following actions are taken:
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
| R | R | R | R | R | RW | RW | RW |
| IOOCW_EXP | IOOCW_MAN | ||||||
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| RW | RW | RW | RW | RW | RW | RW | RW |
| IOOCW_MAN | |||||||
| LEGEND: R/W = Read/Write; R = Read only |
| Bit | Field | Type | Reset | Description |
|---|---|---|---|---|
| 15:11 | IOOCW_EXP | R | 00000b |
Linear two's complement exponent, 0. LSB = 1.0 A |
| 10:0 | IOOCW_MAN | RW | See below. |
Linear two's complement mantissa. |
At power-on, or after a RESTORE_DEFAULT_ALL operation, the IOUT_OC_WARN_LIMIT command will be loaded with the value of IOUT_MAX. The IOUT_MAX bits for each channel are stored in MFR_SPECIFIC_10 (PAGE 0 for channel A, PAGE 1 for channel B). IOUT_OC_WARN_LIMIT may be changed during operation, but will return to this value on reset.