SFFS058A March 2021 – December 2021 DRV8245-Q1
4.4 HW variant in VQFN-HR package
Figure 4-5shows the pin diagram. For a detailed description of the device pins please refer to the Pin Configuration and Functions section in the DRV8245-Q1 data sheet.
Figure 4-5 HW variantTable 4-14 Pin FMA for Device Pins
Short-Circuited to Ground
| Pin | Description of Potential Failure Effect(s) | Failure Effect Class | |
|---|---|---|---|
| No. | Name | ||
| 1 | nFAULT | False fault signalling possible. Device will continue to operate as commanded. | B |
| 2 | IPROPI | IPROPI feedback is lost. ITRIP regulation, if enabled, is also lost. | B |
| 3 | nSLEEP | Device will be in SLEEP state and outputs are Hi-Z. | B |
| 4 | VM | Device is powered off with driver Hi-Z. | B |
| 5,6 | OUT2 | If OUT2 is commanded to be pulled high, short is detected and outputs are Hi-Z. | B |
| 7 | GND | Normal function. | D |
| 8,9 | OUT1 | If OUT1 is commanded to be pulled high, short is detected and outputs are Hi-Z. | B |
| 10 | DRVOFF | Shutoff function is lost. | B |
| 11 | EN/IN1 | Load will be in re-circulation (braking). No risk of spin direction reversal. | B |
| 12 | PH/IN2 | Load will be in re-circulation (braking). No risk of spin direction reversal. | B |
| 13 | DIAG | Wrong load and fault response configuration possible. | B |
| 14 | SR | Wrong SR configuration possible, EM performance may be affected. | B |
| 15 | ITRIP | Incorrect ITRIP level for current regulation possible. | B |
| 16 | MODE | Wrong MODE configuration possible. | B |
Table 4-15 Pin FMA for Device Pins
Open-Circuited
| Pin | Description of Potential Failure Effect(s) | Failure Effect Class | |
|---|---|---|---|
| No. | Name | ||
| 1 | nFAULT | False fault signalling possible. Device will continue to operate as commanded. | B |
| 2 | IPROPI | IPROPI feedback is lost. Load will be forced to recirculte if ITRIP regulation is enabled. | B |
| 3 | nSLEEP | Device will be in SLEEP state and outputs are Hi-Z. | B |
| 4 | VM | Device is powered off with driver Hi-Z. | B |
| 5,6 | OUT2 | Load drive capability is lost. | B |
| 7 | GND | Device is powered off with driver Hi-Z. | B |
| 8,9 | OUT1 | Load drive capability is lost. | B |
| 10 | DRVOFF | Pin based shutoff is triggered and outputs are Hi-Z. | B |
| 11 | EN/IN1 | Load will be in re-circulation (braking). No risk of spin direction reversal. | B |
| 12 | PH/IN2 | Normal function as register bit is used for direction control. | D |
| 13 | DIAG | Wrong load and fault response configuration possible. | B |
| 14 | SR | Wrong SR configuration possible, EM performance may be affected. | B |
| 15 | ITRIP | Incorrect ITRIP level for current regulation possible. | B |
| 16 | MODE | Normal function. | D |
Table 4-16 Pin FMA for Device Pins
Short-Circuited to Adjacent Pin
| Short between pins | Description of Potential Failure Effect(s) | Failure Effect Class | |
|---|---|---|---|
| nFAULT | MODE | False fault signaling possible. MODE setting is not affected. | B |
| IPROPI | nFAULT | False fault signaling possible. IPROPI feedback is inaccurate. ITRIP regulation levels, if enabled, will be lower. | B |
| nSLEEP | IPROPI | IPROPI feedback is inaccurate. ITRIP regulation levels, if enabled, will be lower. | B |
| VM | nSLEEP | SLEEP functionality is lost. | B |
| OUT2 | VM | If OUT2 is commanded to be pulled low, short is detected and outputs are Hi-Z. | B |
| GND | OUT2 | If OUT2 is commanded to be pulled high, short is detected and outputs are Hi-Z. | B |
| OUT1 | GND | If OUT1 is commanded to be pulled high, short is detected and outputs are Hi-Z. | B |
| VM | OUT1 | If OUT1 is commanded to be pulled low, short is detected and outputs are Hi-Z | B |
| DRVOFF | VM | Outputs are Hi-Z. | B |
| EN/IN1 | DRVOFF | Outputs are either Hi-Z or load is in re-circulation state. | B |
| PH/IN2 | EN/IN1 | External PWM control is lost. Internal ITRIP regulation is OK. No risk of spin direction reversal. | D |
| DIAG | PH/IN2 | Normal function as register bit is used for direction control. | D |
| SR | DIAG | Wrong configuration - EM performance may be affected. Load and fault response may be incorrect. | B |
| ITRIP | SR | Wrong configuration - EM performance may be affected. Incorrect ITRIP level for current regulation possible. | B |
| MODE | ITRIP | Wrong configuration possible- Both MODE and ITRIP settings are affected. | B |
Table 4-17 Pin FMA for Device Pins
Short-Circuited to
VM
| Pin | Description of Potential Failure Effect(s) | Failure Effect Class | |
|---|---|---|---|
| No. | Name | ||
| 1 | nFAULT | Device damage possible. | A |
| 2 | IPROPI | Device damage possible. | A |
| 3 | nSLEEP | SLEEP functionality is lost. | B |
| 4 | VM | Normal function. | D |
| 5,6 | OUT2 | If OUT2 is commanded to be pulled low, short is detected and outputs are Hi-Z. | B |
| 7 | GND | Device is powered off with driver Hi-Z. | B |
| 8,9 | OUT1 | If OUT1 is commanded to be pulled low, short is detected and outputs are Hi-Z. | B |
| 10 | DRVOFF | Outputs are Hi-Z. | B |
| 11 | EN/IN1 | Device damage possible. | A |
| 12 | PH/IN2 | Device damage possible. | A |
| 13 | DIAG | Device damage possible. | A |
| 14 | SR | Device damage possible. | A |
| 15 | ITRIP | Device damage possible. | A |
| 16 | MODE | Device damage possible. | A |