SFFS815 February 2024 DRV8262-Q1
PRODUCTION DATA
4 Pin Failure Mode Analysis (Pin FMA)
This section provides a failure mode analysis (FMA) for the pins of the DRV8262-Q1. The failure modes covered in this document include the typical pin-by-pin failure scenarios:
- Pin short-circuited to ground (see Table 4-2)
- Pin open-circuited (see Table 4-3)
- Pin short-circuited to an adjacent pin (see Table 4-4)
- Pin short-circuited to supply (see Table 4-5)
Table 4-2 through Table 4-5 also indicate how these pin conditions can affect the device as per the failure effects classification in Table 4-1.
Table 4-1 TI Classification of Failure Effects
| Class | Failure Effects |
|---|---|
| A | Potential device damage that affects functionality. |
| B | No device damage, but loss of functionality. |
| C | No device damage, but performance degradation. |
| D | No device damage, no impact to functionality or performance. |
Figure 4-1 shows the DRV8262-Q1 pin diagram. For a detailed description of the device pins, see the Pin Configuration and Functions section in the DRV8262-Q1 data sheet.
Figure 4-1 Pin DiagramFollowing are the assumptions of use and the device configuration assumed for the pin FMA in this section:
- The device is used with external components consistent with the values described in the external component table of the data sheet.
Table 4-2 Pin FMA for Device Pins Short-Circuited to Ground
| Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|
| VCP | 1 | Device charge pump non-operational | A |
| VM | 2, 11, 12, 21 | Device will not power up | B |
| PGND12 / PGND | 3, 10 | Intended Operation | D |
| OUT1 | 4, 5, 6 | Device will signal OCP fault | B |
| OUT2 | 7, 8, 9 | Device will signal OCP fault | B |
| PGND34 / PGND | 13, 20 | Intended Operation | D |
| OUT4 / OUT2 | 14, 15, 16 | Device will signal OCP fault | B |
| OUT3 / OUT1 | 17, 18, 19 | Device will signal OCP fault | B |
| GND | 22, 23 | Intended Operation | D |
| DVDD | 24 | Device digital supply stuck low. Device non-operational. Drivers disabled. | B |
| VCC | 25 | Device digital supply stuck low. Device non-operational. Drivers disabled. | B |
| nFAULT | 26 | Device will always be signaling fault | B |
| OCPM | 27 | Device only works with latch-off type recovery for OCP and OTSD | B |
| MODE1 | 28 | Device only works in Dual H-bridge mode | B |
| MODE2 | 29 | Device only works in PH/EN mode | B |
| IPROPI2 / IPROPI | 30 | Current sense output will not be available | B |
| IPROPI1 / IPROPI | 31 | Current sense output will not be available | B |
| RSVD | 32, 36 | No impact to functioality | D |
| VREF2 / VREF | 33 | Current regulation will be lost | B |
| VREF1 / VREF | 34 | Current regulation will be lost | B |
| TOFF | 35 | OFF time will be permanently set at 7 us | B |
| DECAY | 37 | Device will work only with slow decay | B |
| IN4 | 38 | OUT4 will be stuck low | B |
| IN3 | 39 | OUT3 will be stuck low | B |
| IN2 | 40 | OUT2 will be stuck low | B |
| IN1 | 41 | OUT1 will be stuck low | B |
| nSLEEP | 42 | Device will be in sleep state with OUTx Hi-Z | B |
| CPL | 43 | Device charge pump non-operational | B |
| CPH | 44 | Device charge pump non-operational | A |
Table 4-3 Pin FMA for Device Pins Open-Circuited
| Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|
| VCP | 1 | Device charge pump non-operational | B |
| VM | 2, 11, 12, 21 | Device will not power up | B |
| PGND12 / PGND | 3, 10 | Device will not power up | B |
| OUT1 | 4, 5, 6 | Device will not be able to drive the load properly | B |
| OUT2 | 7, 8, 9 | Device will not be able to drive the load properly | B |
| PGND34 / PGND | 13, 20 | Device will not power up | B |
| OUT4 / OUT2 | 14, 15, 16 | Device will not be able to drive the load properly | B |
| OUT3 / OUT1 | 17, 18, 19 | Device will not be able to drive the load properly | B |
| GND | 22, 23 | Device will not power up | B |
| DVDD | 24 | Device digital supply missing. Device non-operational. | B |
| VCC | 25 | Device digital supply missing. Device non-operational. | B |
| nFAULT | 26 | Fault signaling will be lost | B |
| OCPM | 27 | Device only works with latch-off type recovery for OCP and OTSD | B |
| MODE1 | 28 | Device only works in dual H-bridge mode | B |
| MODE2 | 29 | Device only works in PWM mode | B |
| IPROPI2 / IPROPI | 30 | Current sense output will not be available | B |
| IPROPI1 / IPROPI | 31 | Current sense output will not be available | B |
| RSVD | 32, 36 | No impact to functionality | D |
| VREF2 / VREF | 33 | Current regulation will be lost | B |
| VREF1 / VREF | 34 | Current regulation will be lost | B |
| TOFF | 35 | OFF time will be permanently set at 24us | B |
| DECAY | 37 | Device will work only with mixed decay | B |
| IN4 | 38 | PWM functionality will not be available for OUT4 | B |
| IN3 | 39 | PWM functionality will not be available for OUT3 | B |
| IN2 | 40 | PWM functionality will not be available for OUT2 | B |
| IN1 | 41 | PWM functionality will not be available for OUT1 | B |
| nSLEEP | 42 | Device will be in sleep state with OUTx Hi-Z | B |
| CP | 43 | Device charge pump non-operational | B |
| CPH | 44 | Device charge pump non-operational | B |
Table 4-4 Pin FMA for Device Pins Short-Circuited to Adjacent Pin
| Pin Name | Pin No. | Shorted to Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|---|
| VCP | 1 | 2 | Device charge pump non-operational | B |
| VM | 2 | 3 | Device will not power up | B |
| PGND12 | 3 | 4 | Device will signal OCP fault | B |
| OUT1 | 4 | 5 | Intended Operation | D |
| OUT1 | 5 | 6 | Intended Operation | D |
| OUT1 | 6 | 7 | Device will signal OCP fault | B |
| OUT2 | 7 | 8 | Intended Operation | D |
| OUT2 | 8 | 9 | Intended Operation | D |
| OUT2 | 9 | 10 | Device will signal OCP fault | B |
| PGND12 | 10 | 11 | Device will not power up | B |
| VM | 11 | 12 | Intended Operation | D |
| VM | 12 | 13 | Device will not power up | B |
| PGND34 | 13 | 14 | Device will signal OCP fault | B |
| OUT4 | 14 | 15 | Intended Operation | D |
| OUT4 | 15 | 16 | Intended Operation | D |
| OUT4 | 16 | 17 | Device will signal OCP fault | B |
| OUT3 | 17 | 18 | Intended Operation | D |
| OUT3 | 18 | 19 | Intended Operation | D |
| OUT3 | 19 | 20 | Device will signal OCP fault | B |
| PGND34 | 20 | 21 | Device will not power up | B |
| VM | 21 | 22 | Device will not power up | B |
| GND | 22 | 23 | Intended Operation | D |
| GND | 23 | 24 | Digital supply missing. Device non-operational. | B |
| DVDD | 24 | 25 | Digital supply missing. Device non-operational. | B |
| VCC | 25 | 26 | Device will reset whenever nFAULT is asserted low | B |
| nFAULT | 26 | 27 | OCP/OTSD recovery setting and fault signal will be lost | B |
| OCPM | 27 | 28 | OCP/OTSD recovery and MODE setting will be lost | B |
| MODE1 | 28 | 29 | MODE setting will be lost | B |
| MODE2 | 29 | 30 | MODE setting and current sense output function will be lost | B |
| IPROPI2 | 30 | 31 | Current sense output functionality will be lost | B |
| IPROPI1 | 31 | 32 | No impact to functionality | D |
| RSVD | 32 | 33 | No impact to functionality | D |
| VREF2 | 33 | 34 | Independent current regulation will be non-functional | B |
| VREF1 | 34 | 35 | Current regulation and off time setting will be non-functional | B |
| TOFF | 35 | 36 | No impact to functionality | D |
| RSVD | 36 | 37 | No impact to functionality | D |
| DECAY | 37 | 38 | Decay mode setting and input PWM function will be lost | B |
| IN4 | 38 | 39 | Input PWM functionality will be lost | B |
| IN3 | 39 | 40 | Input PWM functionality will be lost | B |
| IN2 | 40 | 41 | Input PWM functionality will be lost | B |
| IN1 | 41 | 42 | Input PWM and Sleep mode function will be lost | B |
| nSLEEP | 42 | 43 | Device charge pump non-operational | A |
| CPL | 43 | 44 | Device charge pump non-operational | B |
| CPH | 44 | 1 | Device charge pump non-operational | B |
Table 4-5 Pin FMA for Device Pins Short-Circuited to supply
| Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|
| VCP | 1 | Device charge pump non-operational | B |
| VM | 2, 11, 12, 21 | Intended Operation | D |
| PGND12 / PGND | 3, 10 | Device will not power up | B |
| OUT1 | 4, 5, 6 | Device will signal OCP fault | B |
| OUT2 | 7, 8, 9 | Device will signal OCP fault | B |
| PGND34 / PGND | 13, 20 | Device will not power up | B |
| OUT4 / OUT2 | 14, 15, 16 | Device will signal OCP fault | B |
| OUT3 / OUT1 | 17, 18, 19 | Device will signal OCP fault | B |
| GND | 22, 23 | Device will not power up | B |
| DVDD | 24 | Low voltage pin maximum voltage violated | A |
| VCC | 25 | Low voltage pin maximum voltage violated | A |
| nFAULT | 26 | Low voltage pin maximum voltage violated | A |
| OCPM | 27 | Low voltage pin maximum voltage violated | A |
| MODE1 | 28 | Low voltage pin maximum voltage violated | A |
| MODE2 | 29 | Low voltage pin maximum voltage violated | A |
| IPROPI2 / IPROPI | 30 | Low voltage pin maximum voltage violated | A |
| IPROPI1 / IPROPI | 31 | Low voltage pin maximum voltage violated | A |
| RSVD | 32, 36 | Low voltage pin maximum voltage violated | A |
| VREF2 / VREF | 33 | Low voltage pin maximum voltage violated | A |
| VREF1 / VREF | 34 | Low voltage pin maximum voltage violated | A |
| TOFF | 35 | Low voltage pin maximum voltage violated | A |
| DECAY | 37 | Low voltage pin maximum voltage violated | A |
| IN4 | 38 | Low voltage pin maximum voltage violated | A |
| IN3 | 39 | Low voltage pin maximum voltage violated | A |
| IN2 | 40 | Low voltage pin maximum voltage violated | A |
| IN1 | 41 | Low voltage pin maximum voltage violated | A |
| nSLEEP | 42 | Driver control will be lost | B |
| CPL | 43 | Device charge pump non-operational | A |
| CPH | 44 | Device charge pump non-operational | B |