12V Automotive Motor Full-Bridge Driver with dual Half-Bridge Driver IC NovalithIC™+ BTN9970LV

Open online SPICE simulator circuit link: atv_12V_motor_brushed_full-bridge_BTN9970LV.TSC

12V Automotive Motor Full-Bridge Driver with dual Half-Bridge Driver IC
NovalithIC™+ BTN9970LV

The model contains 4 different Junction to Ambient thermal networks associated to different metallization and cooling areas.
To switch between the four networks available, change the value of THERMAL_MODEL parameter which can be found on the provided setup test
bench:
THERMAL_MODEL=1: P=1W; T=85°C; PCB type: 1s0p 300mm2;
THERMAL_MODEL=2: P=1W; T=85°C; PCB type: 1s0p 600mm2;
THERMAL_MODEL=3: P=1W; T=85°C; PCB type: 1s0p footprint;
THERMAL_MODEL=4: P=1W; T=85°C; PCB type: 2s2p with thermal via;

where: P=power on the power transistor; T=ambient temperature

The Ambient temperature of the entire chip can be set by connecting a voltage source to TAMB input pin.
Junction temperature can be monitored on TJ output pin.
TJ is always TAMB + temperature due to self-heating of the DMOS.

Observations:
It is required to let the TJ pin open (no external connection)
The convention is 1V=1°C

SR selection mode is determined only when INH voltage is low and IN voltage can be high or low. Also, it is not take into account the pulses
rate on IN pin for SR changes.

SR= Slew Rate external parameter to set desired switching times for HS or LS.

"Analysis->Transient: Start - End Display"
- Double click on the green window to enter design criteria
- Click on "Run" and Simulate Transient

This test bench is used to switch motor load and can be used as a starting point for different configurations.
For more information about the setup please consult Application Information section from datasheet.
The MOTIX™ BTN9970LV is part of the MOTIX™ (NovalithIC™) family containing one p-channel high side
MOSFET and one n-channel lowside MOSFET with an integrated driver IC in one package. Due to the
p-channel highside switch the need for a charge pump is eliminated thus minimizing EMI. Interfacing to
a microcontroller is made easy by the integrated driver IC which features logic level inputs, diagnosis with
current sense, slew rate adjustment, dead time generation and protection against overtemperature,
under voltage, overcurrent and short circuit. The MOTIX™ BTN9970LV provides a cost optimized solution
for protected high current PWM motor drives with very low board space consumption. This device comes
in a small HSOF-7-1 package.