Automotive LED Driver IC LITIX™ Power Flex TLD5541-1QV - test bench Multi-Float-Switch short 6 of 8 LEDs

Open online SPICE simulator circuit link: atv_12v_lighting_TLD5541-1QV_testbench_MFS_short6LEDs.tsc

Multi Float Switch - Transient with TLD5541-1QV

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

{Controller Frequency [F]}
frequency:= 300k {use 200K ... 700K}


t_PREP:=250u {Duration of Multi-Float-Switch routine}
t_SOMFS:=1.5m {start of Multi-Float-Switch routine}

This test bench verifies the Multi Float Switch (MFS) application,
this means the number of LEDs on the output can be changed
without having large current overshoots. For this, the controller
performs special routines to adjust to the right output voltage.
The parameters LED_initial, LED_after, t_PREP and t_SOMFS
must be set accordingly before the simulation is started. For this
test bench it is configured for a jump from 8 LEDs to 2 LEDs.

In this demontration circuit you can configure your Multi Float
Switch (MFS) application parameters in the green text box on
the left side.

For you individual test case, please select the LED amount for
test through the hyperlinks and modify the parameters in the
green configuration box on the left side.

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

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

Implemented:
- Regulation Loops
- Current Limitation on the coil
- Digital and Analog PWM
- Soft Start Behavior
- Multi-Float Switch Application

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