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LED Driver ICs Forum Discussions

Delmore
Level 2
10 replies posted 25 sign-ins 5 questions asked
Level 2

I'm hoping that someone would be able to take a look at a schematic for a custom TLD2142-1EP design (using the TLD2142-1EP chip) to verify that our design is implemented correctly (schematic PDF attached).
Should this be feasible given the design and the capabilities of the TLD2142-1EP chip we are using?
Thanks in advance!

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1 Solution
Kumarkanahai
Moderator
Moderator 10 solutions authored 25 replies posted 5 solutions authored
Moderator

Hi

Looking at the schematic, observations are as follows:

  • The capacitors connected across the LEDs are too big and it is recommended to use 10nF .
  • Capacitors C26, C32, and C33 should also be close to 10nF.
  • It is recommended to keep capacitors C32, C33, C83, and C51 close to Vs and OUTx pin respectively.
  • OUT3 of the second IC is connected to the ground. In this case, the IC will be short-circuited and will be constantly in short-circuit. So, it is recommended to use a Zener diode across OUT3.

For more information, refer to this Article

https://community.infineon.com/t5/LITIX-Automotive-LED-Driver-IC/How-to-connect-pins-of-LITIX-Basic-... 

  • Across the JP6 Connector, it is recommended to use the ISO pulse circuit.
  • For the last schematic, it is recommended to use a 10Nf capacitor across the OUTx pin.
  • Why do the parameters of PWM settings are different for each schematic?

The Nominal and the maximum output Load current of TLD2142-1EP is 180mA and 240mA  respectively whereas the TLD2141-3EP can drive up to 80 mA. Both devices have the same fault management. So, It can be configured and used for the application. For more details regarding fault management you can refer to the attached application note.

https://www.infineon.com/dgdl/Infineon-Z8F64826043_LITIX_Basic+_Diagnosis_and_fault_management-AN-v0... 

In TLD2142-1EP , Pin no-11& 13 are not connected(N.C. Pin). It will not create any impact.

I hope the information will be useful for you.

Best Regards,
Kanahaiya

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AliAsgar
Moderator
Moderator 50 likes received 500 replies posted 250 replies posted
Moderator

Hi,

I went through a query of yours. https://community.infineon.com/t5/LITIX-Automotive-LED-Driver-IC/Consult-LITIX-Basic-series-product-...

Sorry for the confusion, but here the engineer has recommended to use TLD2142-1EP, but I see in the schematics that TLD2142-3EP is used. Lets differentiate between the two.
TLD2142-1EP is a 1 channel output LED driver with a max current of 240mA, while the TLD2142-3EP is a 3 channel output LED driver with a max current of 80mA per channel.
From the cost point of view TLD2142-1EP is cheaper than the 3EP counterpart. 
As the LED panels in your application required a single input line and taking into account the above differences, our engineer had recommended to use the 1EP IC. 

Do you want to change the LED driver IC to the 1EP model or do you want to keep the 3EP model itself?

In the previous query of yours, we had two LED panels of 15 and 12 LEDs respectively. But in the schematic i see three panels of 14, 9 and 9 LEDs.

Please confirm the number of panels and the LED setup.

Best Regards,
AliAsgar

 

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Delmore
Level 2
10 replies posted 25 sign-ins 5 questions asked
Level 2

TLD2141-3EP is used in the circuit design.

Please help confirm that TLD2142-1EP is more recommended than TLD2141-3EP?

In addition, does the circuit design change greatly when TLD2142-1EP replaces TLD2141-3EP?

 

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Delmore
Level 2
10 replies posted 25 sign-ins 5 questions asked
Level 2

Thank you for your reply.

 

Tld2141-3ep is used in the circuit design. Please help confirm that tld2142-1ep is more recommended than tld2141-3ep?

In addition, does the circuit design change greatly when tld2142-1ep replaces tld2141-3ep?

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AliAsgar
Moderator
Moderator 50 likes received 500 replies posted 250 replies posted
Moderator

Hi,

Could you let us know why a single input to the LED panel is required, can we modify the LED panel to have one input to a single LED strip (3 LEDs). Thereby using multiple LED channels out of LED driver for multiple LED strips. This will help in getting a more consistent current in each of the strip.

Best Regards,
AliAsgar

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Delmore
Level 2
10 replies posted 25 sign-ins 5 questions asked
Level 2

Single LED single input, when failure, n-3 optical luminescence does not meet the requirements of the regulations, and the fishing net structure n-1 can meet the regulations.

If this n-1 fishing net structure is made, is TLD2142-1EP recommended? In practical application, what is the maximum driving current of TLD2142-1EP?

In addition, TLD2142-1EP and TLD2141-3EP are replaced by pin to pin. TLD2142-1EP has two pins NC. Do these two pins have an impact on the connection with the out pin?TLD2142-1EP.png

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Delmore
Level 2
10 replies posted 25 sign-ins 5 questions asked
Level 2

Do you have any answers or suggestions to the above questions?

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Kumarkanahai
Moderator
Moderator 10 solutions authored 25 replies posted 5 solutions authored
Moderator

Hi

Looking at the schematic, observations are as follows:

  • The capacitors connected across the LEDs are too big and it is recommended to use 10nF .
  • Capacitors C26, C32, and C33 should also be close to 10nF.
  • It is recommended to keep capacitors C32, C33, C83, and C51 close to Vs and OUTx pin respectively.
  • OUT3 of the second IC is connected to the ground. In this case, the IC will be short-circuited and will be constantly in short-circuit. So, it is recommended to use a Zener diode across OUT3.

For more information, refer to this Article

https://community.infineon.com/t5/LITIX-Automotive-LED-Driver-IC/How-to-connect-pins-of-LITIX-Basic-... 

  • Across the JP6 Connector, it is recommended to use the ISO pulse circuit.
  • For the last schematic, it is recommended to use a 10Nf capacitor across the OUTx pin.
  • Why do the parameters of PWM settings are different for each schematic?

The Nominal and the maximum output Load current of TLD2142-1EP is 180mA and 240mA  respectively whereas the TLD2141-3EP can drive up to 80 mA. Both devices have the same fault management. So, It can be configured and used for the application. For more details regarding fault management you can refer to the attached application note.

https://www.infineon.com/dgdl/Infineon-Z8F64826043_LITIX_Basic+_Diagnosis_and_fault_management-AN-v0... 

In TLD2142-1EP , Pin no-11& 13 are not connected(N.C. Pin). It will not create any impact.

I hope the information will be useful for you.

Best Regards,
Kanahaiya

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