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12V smart low side switch BTF3050TE with linear voltage regulator TLS810D1EJ V50

Open online SPICE simulator circuit link: atv_bp_12V_low_side_BTF3050TE_Demoboard.tsc

HITFET™ Automotive Smart Low-Side Switch BTF3050TE

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

{set battery voltage and load condition}
VBAT:=12 {use 5 ... 24}

{Switching slew rate, datasheet section 5.5}
R_SRP:=5.8k {use 5k ... 70k}

{switching frequency [Hz] + duty cycle}
fs:= 200 {use 1 ... 500}
Duty:=0.4 {use 0.01 ... 0.99}

{Test integrated short circuit protection}
SC_ON:=0 {0: normal operation, 1: short circuit}

{Thermal model number for BTF3050TE}
ThermalModel:=3 {use 1 ... 4}
{ThermalModel=1: 1s0p PCB 300\e(mm,2)}
{ThermalModel=2: 1s0p PCB 600\e(mm,2)}
{ThermalModel=3: 1s0p PCB min. footprint}
{ThermalModel=4: 2s2p PCB}

{Ambiente temperature [Celsius] }
Tamb:=50 {use 0 ... 120}

{===DO NOT CHANGE BELOW========}
T_ON:= Duty*T {on time}
T_OFF:=T-T_ON {off time}

Emulation of 74AHC1G04DBV

fault test:
short circuit

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The BTF3050TE Demoboard is a small PCB (85mm x 70mm) where a BTF3050TE
sample is already mounted. An integrated voltage regulator provides a stable 5V to
the device supply pin. The SRP resistor selector allows the user to control the device’s
Slew Rate. LEDs show the device status.

The part works at normal operation mode when SPDT1 switches to the left side.
Different slew rates can be got by conducting buttons 1 to 3 respectively.

SPDT1 switches to the right side for short circuit test, on this mode the part is self-
protected and diagnosis voltage VSRP increases from VSRP(NOR) to VSRP(FAULT).

LED1 and 2 indicate the the fault status(on for fault) and 5V supply voltage(on for
active) respectively. By clicking 'TR' on the up left corner the two LEDs will be on
or off acc. to the setup of SPDT1

Product info: TLS810D1EJ V50
Smart Switch Finder
Product info: BTF3050TE

Evaluation Board: DEMOBOARD BTF3050TE
Application Note for HITFET+
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