SFFS110 June 2021 TPS1663
4.1 VQFN Package
Figure 4-1 shows the TPS1663 pin diagram for the VQFN package. For a detailed description of the device pins please refer to the Pin Configuration and Functions section in the TPS1663 data sheet.
Figure 4-1 TPS16630 Pin Diagram (VQFN) Package
Figure 4-2 TPS16632 Pin Diagram (VQFN)
PackageTable 4-2 Pin FMA for Device Pins
Short-Circuited to Ground
| Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|
| IN | 1,2 | Device unpowered. Device not functional. | B |
| NC | 3, 4, 15, 19, 20, 21, 22, 23, 24 | No effect. Normal operation. | D |
| P_IN | 5 | Device unpowered. Device not functional. | B |
| UVLO | 6 | UVLO protection is triggered. Device turns off the internal FET. | B |
| OVP or PLIM | 7 | Over-voltage protection or power limiting will not function. | B |
| GND | 8 | No effect. Normal operation. | D |
| dVdT | 9 | Device doesn’t power up. | B |
| ILIM | 10 | Device doesn’t power up. | B |
| MODE | 11 | Device provides auto-retry behavior for over-current events as per device functional modes in data sheet. | D |
| SHDN | 12 | Device is disabled. | B |
| IMON | 13 | Current monitor function is not available. | B |
| FLT | 14 | Fault function is not available. | B |
| PGOOD | 16 | PGOOD function is not available. | B |
| OUT | 17, 18 | Device will enter into current limiting operation. | B |
Table 4-3 Pin FMA for Device Pins
Open-Circuited
| Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|
| IN | 1,2 | Device unpowered. Device is not functional. | B |
| NC | 3, 4, 15, 19, 20, 21, 22, 23, 24 | No effect. Normal operation. | D |
| P_IN | 5 | Device unpowered. Device is not functional. | B |
| UVLO | 6 | Device functionality undetermined. Device may turn off / power down. | B |
| OVP or PLIM | 7 | TPS16630: over-voltage protection function is not determined. Device may turn off the internal FET. TPS16632: output power limit is set to power more than 400 W. | B |
| GND | 8 | Device unpowered. Device is not functional. | B |
| dVdT | 9 | Device provides slew rate 24 V/500 μs on output. | D |
| ILIM | 10 | Internal FET is turned off. Output is not powered up. | B |
| MODE | 11 | Device provides latch-off behavior for over-current events as per device functional modes in data sheet. | D |
| SHDN | 12 | No effect. Normal operation. | D |
| IMON | 13 | No effect. Normal operation. | D |
| FLT | 14 | No effect. Normal operation. | D |
| PGOOD | 16 | No effect. Normal operation. | D |
| OUT | 17, 18 | No power or current provided to load. | D |
Table 4-4 Pin FMA for Device Pins
Short-Circuited to Adjacent Pin
| Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|
| IN | 1,2 | IN to NC: no effect. Normal operation. | D |
| NC | 3, 4, 15, 19, 20, 21, 22, 23, 24 | NC to P_IN: no effect. Normal operation. | D |
| P_IN | 5 | P_IN to UVLO: under-voltage protection will not function. | B |
| UVLO | 6 | UVLO to OVP/PLIM: potential device damage if UVLO voltage is more than 5.5 V. | A |
| OVP or PLIM | 7 | OVP/PLIM to GND: over-voltage protection or Power limiting will not function. | B |
| GND | 8 | GND to dVdT: device unpowered. Device not functional. | B |
| dVdT | 9 | dVdT to ILIM: device can go into current limit operation. | B |
| ILIM | 10 | ILIM to MODE: device can go into current limit operation or Latch-off mode. | B |
| MODE | 11 | MODE to SHDN: device can go into shutdown. | B |
| SHDN | 12 | SHDN to IMON: device can go into shutdown. | B |
| IMON | 13 | IMON to FLT: potential Device damage if FLT pin voltage is more than 5.5 V. | A |
| FLT | 14 | PGOOD to FLT: oring of PGOOD and FLT signals. | D |
| PGOOD | 16 | PGOOD to OUT: potential device damage when PGOOD is low and output is powered up. | A |
| OUT | 17, 18 | OUT to N.C: no effect. Normal operation. | D |
Table 4-5 Pin FMA for Device Pins
Short-Circuited to IN or
P_IN
| Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|
| IN | 1,2 | No effect. Normal operation. | D |
| NC | 3, 4, 15, 19, 20, 21, 22, 23, 24 | No effect. Normal operation. | D |
| P_IN | 5 | No effect. Normal operation. | D |
| UVLO | 6 | Under-voltage protection will not function. | B |
| OVP or PLIM | 7 | Potential device damage if supply voltage is more than 5.5 V. | D |
| GND | 8 | Short circuit of input supply. | B |
| dVdT | 9 | Potential device damage if supply voltage is more than 5.5 V. | A |
| ILIM | 10 | Potential device damage if supply voltage is more than 5.5 V. | A |
| MODE | 11 | Potential device damage if supply voltage is more than 5.5 V. | A |
| SHDN | 12 | Potential device damage if supply voltage is more than 5.5 V. | A |
| IMON | 13 | Potential device damage if supply voltage is more than 5.5 V. | A |
| FLT | 14 | Potential device damage if FLT pin is low. | A |
| PGOOD | 16 | Potential device damage if PGOOD pin is low. | A |
| OUT | 17, 18 | Device will not limit power or current into load. | B |