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12V Automotive LED synchronous H-Bridge topology with LITIX™ Power controller TLD5190 (Slow Switch)

Open online SPICE simulator circuit link: atv_12v_LED_lighting_full-bridge_controller_TLD5190_V3.tsc

12V Automotive LED synchronous H-Bridge topology with LITIX™ Power controller TLD5190 (Slow Switch)

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

This model has limitations. It does
not include the driver output stage.
That is why we need to use ideal
switches (no bootstrap simulation

The PSpice model does not show all
features of the real device to keep the
simulation time in a reasonable range.

The TLD5190QU is a synchronous MOSFET H-Bridge DC/DC
controller with built in protection features. This concept of a
synchronous and seamless buck-boost regulation provides a
very efficient solution for circuits where the output (load) voltage
is on the same level as the input voltage, e.g. in short chains
with 2 to 3 high power LEDs or laser diodes connected to a 12 V
electrical system.

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 at the output. It is accomplished
by controlled discharge of the output voltage to a value closer to
the equivalent voltage drop of the new number of LEDs. A short
circuit event is applied at 1.5 ms causing the output voltage to
decrease and based on the turn-on timing of the PMOS, 2 out
of 5 LEDs are shorted.

For you individual test case, please modify the frequency
parameter in the green configuration box on the left side.

- Regulation Loops
- Digital and Analog PWM
- Soft Start Behavior

NOT implemented :
- Current consumption of IC
- Thermal Network
- Fault Handling
- Fault Reporting
- External Clock Sync
- Limp Home
- Spread Spectrum
- LDO Output

Model Application Note

Evaluation Board: TLD5190 VOLT DEMO

Other circuits
Product info: TLD5190QU

Technical Assistance Center
Evaluation Board: TLD5190QV DEMO V1