Automotive smart high side switch BSP742R test-bench: thermal shutdown with restart

Open online SPICE simulator circuit link: atv_bp_protection_12V_BSP742R_thermal_shutdown.tsc


Smart High-Side Switch BSP742R
Protection Features: Thermal shutdown with Restart

Thermal model description:
THERMALMODEL = 1: 1S0P PCB 600mm2
THERMALMODEL = 2: 2S2P no vias
THERMALMODEL = 3: 2S2P vias

{1. click here to set circuit parameters}
{2. click on "Run" to calculate components}
{3. click on "OK" and Simulate Transient }

{Supply Voltage [V] }
Vbb:= 20 {Use 5....34}

{Short circuit on/off trigger time [s] }
tSC_on:= 10m
tSC_off:= 35m

{Thermal model number: }
THERMALMODEL:= 1 {use 1 .... 3}

The BSP742R is High side power switch with integrated vertical power
FET, providing embedded protection and diagnostic functions.

This circuit demonstrates the thermal shutdown with restart features of
the BSP742R. Many other switches provide similar protection features.

Considering thermal behavior (choose thermal model 1....3), the junction
temperature is also rising quickly. Once the thermal shutdown protection
is triggered, the device shuts down autonomously with restart. It shuts
down and restart continuously if the temperature is higher than the trigger
value.


Product info: BSP742R
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