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TPS92630Q1.

Shinu.V.Mathew
Expert 7435 points
Other Parts Discussed in Thread: TPS92630-Q1

Hi Team,

One of our  automotive customer is designing with TPS92630Q1 and below is the configuration.

Two PCBs placed at distance of 42cm, on  PCB1 TPS92630 is placed along with 2 series LED's connected to channel 1 and  PCB2 to operate another 2 series Leds with channel 2. Distance between PCB1 and PCB2 is ~42cm and connect each other with  0.35mm2 wire. LED driving current is 22mA min and 38mA max with Vf = 2.65V.

Attached is the block diagram for your quick reference. What are the precautions taken during design in schematic and layout for this configuration, plaese help with your comment and views.

Thanks in advance for your help and support.

Regards,

Shinu Mathew.TPS92630 block.docx

  • 0
    TI__Expert 7435 points
    Hi Team,

    Can you please help with your comments.

    Thanks, Shinu Mathew.
  • 0 in reply to Shinu.V.Mathew
    TI__Expert 5475 points
    Hi Shinu,

    Sorry we don't respond in time. I have moved the post to the automotive forum and the appropriate applications engineer has been notified of your post. Thanks very much for your patience.

    Best regards,
    Shirley He
  • 0 in reply to Shirley He
    TI__Expert 7435 points
    Thanks Shirley,

    Team,
    Can you please help on the above query.

    Thanks, Shinu Mathew.
  • 0 in reply to Shinu.V.Mathew
    TI__Expert 5380 points

    Mathew,

    Sorry for the late reply, as this is an automotive device, so if possible please post the question to automotive forum, we will response to the question quickly.

    Generally speaking, the long cable will bring in some parasitic inductance to the output loop. For the 42cm cable, as the parasitic inductance is small, TPS92630-Q1 will have no problem to support it. 

  • 0 in reply to Anda Zhang
    TI__Expert 7435 points

    Hi Anda,

    Thanks for the reply.

    We tested the same in the EVM and is working fine.

    From the same customer we have one more query for different applications. Customer need input from our side regarding TPS92630 performance for below application.

    During Ignition ON and ignition OFF, LEDs will blink with PWM signal on Vin pin of IC. Will have waveform as attached image with time period T2, T3, T4.

    TPS92630 new design PWM and timing.docx

    Details of PWM signal are as below:

    DESCRIPTION

    DEFAULT VALUE

    RESOLUTION

    RANGE

    Magic_park_lamp_time_T1

    1500 ms

    100 ms

    0-10 Sec

    Magic_park_lamp_time_T2

    300 ms

    100 ms

    0-10 Sec

    Magic_park_lamp_time_T3

    500 ms

    100 ms

    0-10 Sec

    Magic_park_lamp_time_T4

    500 ms

    100 ms

    0-10 Sec

    Magic_park_lamp_time_T5

    1500 ms

    100 ms

    0-10 Sec

    Magic_Park_Lamp_Count

    2

    1 count

    1-10

    With above pattern signal will reach to 5V with delay of 700msec at start up and similar at the end of signal. Will the required function can work with above PWM pattern( for range 5V  to 12V) at Vin pin of  TPS92630.

    Please help with your valuable input on the same. Thanks in advance for your help and support.

    Regards, 

    Shinu Mathew.