SLVAEL7A December 2019 – August 2024 TPS7B7701-Q1 , TPS7B7702-Q1
4.2 Dual-Channel Package
Figure 4-2 Dual-Channel, TPS7B7702-Q1 PWP
Package, 16-Pin HTSSOP With PowerPAD™ Integrated Circuit Package (Top
View)Table 4-6 Pin FMA for Device Pins
Short-Circuited to Ground
| Pin Name | Pin No. | Description of Potential Failure Effects | Failure Effect Class |
|---|---|---|---|
| IN | 1 | No input to the device. The output is off. | B |
| EN1 | 2 | No input to the device. The OUTx is off. | B |
| EN2 | 3 | No input to the device. The OUTx is off. | B |
| VCC | 4 | Device cannot turn on. | B |
| SENSE1 | 5 | No use of current sense functionality for OUTx | B |
| SENSE2 | 6 | No use of current sense functionality for OUTx | B |
| SENSE_SEL | 7 | If SENSE_EN is low, SENSE1 and SENSE2 are enabled. Otherwise, outputs are high impedance. | B |
| SENSE_EN | 8 | Sense functionality enabled. | B |
| ERR | 9 | Device falsely reports error signal. | B |
| LIM1 | 10 | Current limit for OUTx is set to default. | B |
| LIM2 | 11 | Current limit for OUTx is set to default. | B |
| GND | 12 | No effect, normal operation. | D |
| FB2 | 13 | Device acts as a switch | B |
| OUT2 | 14 | Regulation is not possible; the device operates at current limit. OUTx can cycle in and out of thermal shutdown. | B |
| FB1 | 15 | Device acts as a switch. | B |
| OUT1 | 16 | Regulation is not possible; the device operates at current limit. OUTx can cycle in and out of thermal shutdown. | B |
Table 4-7 Pin FMA for Device Pins
Open-Circuited
| Pin Name | Pin No. | Description of Potential Failure Effects | Failure Effect Class |
|---|---|---|---|
| IN | 1 | No input, the output is at ground. | B |
| EN1 | 2 | Device not enabled, the OUTx is at ground. | B |
| EN2 | 3 | Device not enabled, the OUTx is at ground. | B |
| VCC | 4 | Device still operates, but internal regulator output VCC oscillates, and so output noise is increased, and noise on the SENSEx, ILIMx pins also increases. | C |
| SENSE1 | 5 | No change in device function; no access to SENSEx outputs. | B |
| SENSE2 | 6 | No change in device function; no access to SENSEx outputs. | B |
| SENSE_SEL | 7 | Current channel monitoring status is unknown. | B |
| SENSE_EN | 8 | SENSE_EN is always active (low) (there is an internal pulldown resistor). | B |
| ERR | 9 | No access to error signal. | B |
| LIM1 | 10 | When LIMx is open, OUTx does not turn on. | B |
| LIM2 | 11 | When LIMx is open, OUTx does not turn on. | B |
| GND | 12 | There is no current loop for internal biasing, so the device cannot function. | B |
| FB2 | 13 | The error amplifier input is not connected. The output voltage is indeterminate. | B |
| OUT2 | 14 | The load is not powered. | B |
| FB1 | 15 | The error amplifier input is not connected. The output voltage is indeterminate. | B |
| OUT1 | 16 | The load is not powered. | B |
Table 4-8 Pin FMA for Device Pins
Short-Circuited to Adjacent Pin
| Pin Name | Pin No. | Shorted to | Description of Potential Failure Effects | Failure Effect Class |
|---|---|---|---|---|
| IN | 1 | EN1 | Device is always powered. | D |
| EN1 | 2 | EN2 | There is no discrete control over OUTx outputs | B |
| EN2 | 3 | VCC | If EN is greater than 6V, VCC can be damaged. If EN is less that 6V, Output can be out of regulation, SENSE outputs incorrect. | A/B |
| VCC | 4 | SENSE1 | Internal circuitry has less headroom and performance degrades | C |
| SENSE1 | 5 | SENSE2 | Current reading is incorrect. | B |
| SENSE2 | 6 | SENSE_SEL | Current reading is incorrect. Damage to SENSE_SEL pin in possible. | A/B |
| SENSE_SEL | 7 | SENSE_EN | Multiplexing capabilities are limited to both SENSEx signals being on or high impedance | B |
| SENSE_EN | 8 | ERR | If ERR is pulled high, SENSEx channels are both high impedance. If ERR is pulled low, SENSE_SEL multiplexes between outputs. | B |
| ERR | 9 | LIM1 | If ERR is pulled high, no effect. If ERR is pulled low, current limit increases. | B |
| LIM1 | 10 | LIM2 | If LIMx is pulled high, no effect. If LIMx is pulled low, current limit for OUTx is set to default. | B |
| LIM2 | 11 | GND | Current limit for OUTx is set to default. | B |
| GND | 12 | FB2 | OUTx acts as a switch. | B |
| FB2 | 13 | OUT2 | OUTx voltage is equal to the internal reference voltage. If OUTx is forced to greater than 7V, FB can be damaged. | B/A |
| OUT2 | 14 | FB1 | OUTx voltage is equal to the internal reference voltage. If OUTx is forced to greater than 7V, FB can be damaged. | B/A |
| FB1 | 15 | OUT1 | OUTx voltage is equal to the internal reference voltage. If OUTx is forced to greater than 7V, FB can be damaged. | B/A |
| OUT1 | 16 | IN | Regulation not possible. Vout = Vin | B |
Table 4-9 Pin FMA for Device Pins
Short-Circuited to supply
| Pin Name | Pin No. | Description of Potential Failure Effects | Failure Effect Class |
|---|---|---|---|
| IN | 1 | No effect, normal operation. | D |
| EN1 | 2 | Device is always enabled. | B |
| EN2 | 3 | Device is always enabled. | B |
| VCC | 4 | If IN is greater than 6V, VCC can be damaged. If IN is less that 6V, Output can be out of regulation. SENSE outputs incorrect. | A/B |
| SENSE1 | 5 | If IN is greater than VCC + 0.3V, SENSE can be damaged. If IN is less than VCC + 0.3V, lose sense functionality. | A/B |
| SENSE2 | 6 | If IN is greater than VCC + 0.3V, SENSE can be damaged. If IN is less than VCC + 0.3V, lose sense functionality. | A/B |
| SENSE_SEL | 7 | If SENSE_EN is low, SENSE1 is active and SENSE2 is high impedance. Otherwise, both are high impedance. | B |
| SENSE_EN | 8 | If IN is greater than 7V, SENSE_EN can be damaged. If IN is less than 7V, sense functionality is always disabled. | A/B |
| ERR | 9 | If IN is greater than 7V, ERR can be damaged. If IN is less than 7V, loss of error functionality. | A/B |
| LIM1 | 10 | If IN is greater than 7V, LIMx can be damaged. If IN is less than 7V, VOUTx does not come up | A/B |
| LIM2 | 11 | If IN is greater than 7V, LIMx can be damaged. If IN is less than 7V, VOUTx does not come up. | A/B |
| GND | 12 | Supply is shorted to GND, no output voltage. Damage to upstream supply is possible. | B |
| FB2 | 13 | If supply is greater than 7V, the maximum rating for FBx is violated and can damage the device. If supply is less than 7V, the output is approximately 0V. | A/B |
| OUT2 | 14 | Regulation not possible. Vout = Vin. | B |
| FB1 | 15 | If supply is greater than 7V, the maximum rating for FBx is violated and can damage the device. If supply is less than 7V, the output is approximately 0V. | A/B |
| OUT1 | 16 | Regulation not possible. Vout = Vin. | B |