All the waveforms below are captured on an evaluation setup with five (5) TPS25985 eFuses in parallel. All the pullup supplies are derived from a separate standby rail.
Figure 9-4 Input Hot Plug: VIN Stepped Up from 0 V to 12 V, CLOAD = 55 mF, CDVDT = 33 nF, RIREF = 40.2 kΩ, and RILIM on Each Device = 300 Ω
Figure 9-6 Start-up with EN/UVLO (Current distribution among five devices in parallel): VIN = 12 V, EN/UVLO Stepped Up From 0 V to 3 V, CLOAD = 55 mF, CDVDT = 33 nF, RIREF = 40.2 kΩ, and RILIM on Each Device = 300 Ω
Figure 9-8 Power Up into Short (Current distribution among five devices in parallel): VIN = 12 V, EN/UVLO Stepped Up From 0 V to 3 V, RIREF = 40.2 kΩ, RILIM on Each Device = 300 Ω, and OUT Shorted to GND
Figure 9-10 Transient Overload (Current distribution among five devices in parallel): VIN = 12 V, CITIMER = 22 nF, CLOAD = 55 mF, RIMON = 167 Ω, RIREF = 40.2 kΩ, and Load Current Stepped from 300 A to 450 A then 300 A within 8.5 ms
Figure 9-12 Circuit-Breaker Response (Current distribution among five devices in parallel): VIN = 12 V, CITIMER = 22 nF, CLOAD = 55 mF, RIMON = 167 Ω, RIREF = 40.2 kΩ, and Load Current Stepped up From 300 A to 475 A for > 20 ms
Figure 9-14 Two (2) TPS25985x eFuses in Parallel: Temperature Rise with 100-A DC Current at Room Temperature (No Air-Flow)
Figure 9-5 Start-up with EN/UVLO: VIN = 12 V, EN/UVLO Stepped Up From 0 V to 3 V, CLOAD = 55 mF, RLOAD(Start-up) = 0.33 Ω, CDVDT = 33 nF, RIREF = 40.2 kΩ, and RILIM on Each Device = 300 Ω
Figure 9-7 Power Up into Short: VIN = 12 V, EN/UVLO Stepped Up From 0 V to 3 V, RIREF = 40.2 kΩ, RILIM on Each Device = 300 Ω, and OUT Shorted to GND
Figure 9-9 Transient Overload: VIN = 12 V, CITIMER = 22 nF, CLOAD = 55 mF, RIMON = 167 Ω, RIREF = 40.2 kΩ, and Load Current Stepped from 300 A to 400 A then 300 A within 10 ms
Figure 9-11 Circuit-Breaker Response: VIN = 12 V, CITIMER = 22 nF, CLOAD = 55 mF, RIMON = 167 Ω, RIREF = 40.2 kΩ, and Load Current Stepped up From 300 A to 500 A for > 20 ms
Figure 9-13 Output Hot-Short Response: VIN = 12 V, RIMON = 167 Ω, RIREF = 40.2 kΩ, and OUT Shorted to GND