12 V Automotive LED synchronous H-Bridge topology with LITIX™ Power controller TLD5191ES (Slow switch)

Open online SPICE simulator circuit link: atv_12v_LED_lighting_full-bridge_controller_TLD5191ES_SLOW_SWITCH.tsc

12 V Automotive LED synchronous H-Bridge topology with LITIX™ Power controller TLD5191ES
Application Circuit: Slow Switch - transient

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

When the load changes (e.g. the number of LEDs is suddenly decreased), the voltage at the output capacitor creates
a current spike which can damage the LEDs.
The setup shows a slow switching technique which prevents the appearance of the current spike by controlled discharge
of the output voltage to a value closer to the equivalent voltage drop of the new
number of LEDs. A load bypass event is applied at 2ms causing the output voltage to decrease and based on the turn-on
timing of the PMOS, 2 out of 5 LEDs are shorted.

Notes:
BODY_DIODE is not a real diode but a Voltage Controlled Current Source which models the threshold and ON/OFF
states resistance.
For correct functioning of the controller, the simulation maximum time step cannot exceed 150 ns. Values above this
limit affect the internal clock generation.