ZHCSR16 September 2022 TPS544C26
ADVANCE INFORMATION
| CMD Address | B4h |
| Write Transaction: | Write Byte |
| Read Transaction: | Read Byte |
| Format: | Unsigned Binary (1 byte) |
| NVM Backup: | EEPROM |
| Updates: | On-the-fly |
The IOUT_NOC_LIMIT command contains 3 fields for configuring the VOUT Fixed OVF and Neagive Overcurrent (NOC) limit selection.
The SEL_FIX_OVF bit sets the value of the output voltage measured at the (VOSNS ? GOSNS) pins that causes an output overvoltage fault. The Fixed OVF function sets a constant overvoltage threshold that has no relationship to the current VOUT setting. The VOUT Fixed OVF is active as soon as the TPS544C26 device completes its power-on reset, even if the output conversion is disabled.
Following a Fixed OVF condition, the device always latches OFF high-side MOSFET and latches ON low-side MOSFET. The response setting in (41h) VOUT_OV_FAULT_RESP register does not affect the response for a Fixed OVF condition.
The VOUT Fixed OVF feature can be disabled through the EN_FIX_OVF bit.
The NOC threshold which scales with ICC_MAX setting (see (C0h) ICC_MAX) is selected by SEL_NOC field.
Return to Supported I2C and Default Values.
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| R | R | R | R | R/W | R/W | R/W | R/W |
| Reserved | SEL_FIX_OVF | EN_FIX_OVF | SEL_NOC | ||||
| LEGEND: R/W = Read/Write; R = Read only |
| Bit | Field | Access | Reset | Description |
|---|---|---|---|---|
| 7:4 | Reserved | R | 0000b | Not used and always set to 0. |
| 3 | SEL_FIX_OVF | R/W | NVM | Select the VOUT Fixed OVF thresholds. See details on Table 7-74. |
| 2 | EN_FIX_OVF | R/W | NVM |
0b: Enable the VOUT Fixed OVF 1b: Disable the VOUT Fixed OVF |
| 1:0 | SEL_NOC | R/W | NVM | Select the Negative Overcurrent limits which scale with ICC_MAX setting. See details on Table 7-75. |
| PROTOCOL_ID in (C2h) PROTOCOL_ID_SVID | SEL_FIX_OVF[1] in (B4h) IOUT_NOC_LIMIT | VOUT Fixed OVF threshold (V) |
|---|---|---|
| PROTOCOL_ID = 01b or 10b (VOUT step = 5 mV) | 0 | 1.5 |
| PROTOCOL_ID = 01b or 10b (VOUT step = 5 mV) | 1 | 1.8 |
| PROTOCOL_ID = 00b or 11b (VOUT step = 10 mV) | 0 | 2.4 |
| PROTOCOL_ID = 00b or 11b (VOUT step = 10 mV) | 1 | 3.0 |
| SEL_NOC[1:0] | Negative Overcurrent Limits (A) | |
|---|---|---|
| ICC_MAX ≥ 15 A | ICC_MAX ≤ 10 A | |
| 00 | ?20 | ?10 |
| 01 | ?15 | ?7.5 |
| 10 | ?12 | ?6 |
| 11 | ?10 | ?5 |