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

Open online SPICE simulator circuit link: atv_12v_LED_lighting_full-bridge_controller_TLD5191ES_PWM_ENGINE.tsc

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

This test bench shows digital dimming via internal PWM engine feature.
During rising edge of SOFT_START, the internal PWM signal is extended until one of the two following conditions is reached:
- VSOFT_START exceeds VSOFT_START_LOFF
- VFBH-FBL exceeds VFBH_FBL_OL
Depending on voltage level at PWMI pin, the output current is dimmed accordingly with a certain duty cycle (digital dimming).
A PWMI low pulse is applied for more than 25 ms to show the restart of the device with a soft start routine.

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 150ns. Values above this limit affect the
internal clock generation.

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