All the waveforms below are captured on an evaluation setup with one (1) TPS25990 eFuse and five (5) TPS25985x eFuses in parallel. All the pullup supplies are derived from a separate standby rail.
Figure 9-5 Input Hot Plug: VIN Stepped Up from 0 V to 12 V, CLOAD = 50 mF, RLOAD(Start-up) = 0.48 Ω, CDVDT = 33 nF, VIREF = 1 V, RILIM(TPS25990) = 422 Ω, and RILIM(TPS25985) = 316 Ω Figure 9-7 Power Up into Short: VIN = 12 V, EN/UVLO Stepped Up From 0 V to 3 V, VIREF = 1 V, RILIM(TPS25990) = 422 Ω, RILIM(TPS25985) = 316 Ω, and OUT Shorted to GND Figure 9-9 Transient Overload: VIN = 12 V, tOC_TIMER = 10 ms, CLOAD = 50 mF, RIMON = 150 Ω, VIREF = 1 V, and Load Current Stepped from 333 A to 500 A then 333 A within 8.5 ms Figure 9-11 Circuit-Breaker Response: VIN = 12 V, tOC_TIMER = 10 ms, CLOAD = 50 mF, RIMON = 150 Ω, VIREF = 1 V, and Load Current Stepped from 333 A to 530 A for more than 10 ms Figure 9-13 Output Hot-Short Response: VIN = 12 V, RIMON = 150 Ω, VIREF = 1 V, and OUT Shorted to GND Figure 9-6 Start-up with EN/UVLO: VIN = 12 V, EN/UVLO Stepped Up From 0 V to 3 V, CLOAD = 50 mF, RLOAD(Start-up) = 0.48 Ω, CDVDT = 33 nF, VIREF = 1 V, RILIM(TPS25990) = 422 Ω, and RILIM(TPS25985) = 316 Ω Figure 9-8 Power Up into Short (Current distribution among six devices in parallel): VIN = 12 V, EN/UVLO Stepped Up From 0 V to 3 V, VIREF = 1 V, RILIM(TPS25990) = 422 Ω, RILIM(TPS25985) = 316 Ω, and OUT Shorted to GND Figure 9-10 Transient Overload (Current distribution among six devices in parallel): VIN = 12 V, tOC_TIMER = 10 ms, CLOAD = 50 mF, RIMON = 150 Ω, VIREF = 1 V, and Load Current Stepped from 333 A to 500 A then 333 A within 8.5 ms Figure 9-12 Circuit-Breaker Response (Current distribution among six devices in parallel): VIN = 12 V, tOC_TIMER = 17 ms, CLOAD = 50 mF, RIMON = 150 Ω, VIREF = 1 V, and Load Current Stepped from 333 A to 530 A for more than 17 ms Figure 9-14 One (1) TPS25990 eFuse and one (1) TPS25985x eFuse in Parallel: Temperature Rise with 110-A DC Current at Room Temperature (No Air-Flow)