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TPS65987DDK: Is there a wide temperature product of -40 ℃ ~85 ℃ that supports 100W power source

Rain Wang
Expert 1380 points
Part Number: TPS65987DDK
Other Parts Discussed in Thread: TPS65987D, TPS55288, LM3489, LM5175, PMP20042, LM61460, LM61440

hi TI

    The customer needs to make the source end, battery powered, 24V input, and 100W output power to charge the mobile phone. There is no data communication demand. Is there a chip that meets the wide temperature（-40 ℃ ~85 ℃） version and can be provided according to the overall design scheme?

I found only 6 chips meeting 100W power, all of which are -10~75 ℃。

  • 0
    TI__Mastermind 27525 points

    Hello,

    Unfortunately we do not have a device that meets this requirements. The TPS65987D would be the best device for a 100W Type-C Source only application, but the temperature ranges do not go to -40C

  • 0 in reply to Adam Mc Gaffin
    Expert 1380 points

    thanks ， For a 100W Type-C Source only application，Is there a reference design? Because there are many type-C interface pins, the customer does not know which chips and connections are necessary.

  • 0 in reply to Rain Wang
    TI__Mastermind 27525 points

    You can reference the following design that pairs the TPS55288 with the TPS65987D

    https://www.ti.com/tool/PMP40801 

  • 0 in reply to Adam Mc Gaffin
    Expert 1380 points

    Thank you. This information is very helpful to the customer；

    There are two more questions I would like to communicate with you:

    1 Is the memory chip mx25l8006em11 necessary? What data needs to be stored?

    2. is it OK to replace tps55288 with lm3489? The latter should be more cost-effective

  • 0 in reply to Rain Wang
    TI__Mastermind 27525 points

    An external EEPROM is required for operation of the TPS65987D. A firmware image is generating using the configuration tool, and this image must be loaded onto the PD controller via the external EEPROM. 

    For your second question, I have moved this thread to the team responsible for this device. They will be able to better assist. 

  • 0 in reply to Rain Wang
    TI__Mastermind 47060 points

    Hello,

    Do you expect your battery to go below 20V? It may make more sense to have a buck boost converter which can account for input voltages lower than output voltage. 

    See the TI reference design for 100W application using the LM5175 (https://www.ti.com/tool/PMP20042). 

    Regards,

    Jimmy

  • 0 in reply to Jimmy Hua
    Expert 1380 points

    hi Jimmy

         The customer's front power supply will be guaranteed to be greater than 20V；

         Is it possible to use a step-down chip, such as LM3489, to reduce the customer's cost?

         The customer is more concerned about the cost.

  • 0 in reply to Jimmy Hua
    Expert 1380 points

    hi JIMMY

    add:

    Does the pmp20042 application need not use the type-C control chip? How to control output voltage negotiation? If it can meet the needs of customers, the cost is very low;

    Is there any way to buy this reference design board?

  • 0 in reply to Rain Wang
    TI__Mastermind 47060 points

    Hi,

    To simplify things, I think you can use a converter like the LM61460 to achieve the 100W USB Type C source application. There is an application circuit shown in LM61440 datasheet shown in Section 9.2.4. 

    The PMP20042 does not do output voltage negotiation since the way to dynamically change the output is by multiple open drain control switches to parallel different bottom resistors. 

    If you plan on using the buck converter method, you will need to externally provide output voltage negotiation. The buck converter will only be providing a source to drop VIN to USB Type C output voltages. 

    Regards,
    Jimmy 

  • 0 in reply to Jimmy Hua
    Expert 1380 points

    hi Jimmy

        Thanks a lot;

    According to your suggestion, there are currently two options. Please help me see if my understanding is correct:

    1. it is not necessary to negotiate through the type-C interface to output the 20v-5a power supply scheme: it can be realized by using one chip of lm61440;

    2. it is necessary to negotiate and output different voltages through the type-C interface: lm3489 and tps65987d can be used for cooperation, and two chips can be used for implementation.

  • 0 in reply to Rain Wang
    TI__Mastermind 47060 points

    Hi,

    1. Yes. This will only be the DC/DC source to the PD ports. There will still need to be a controller to achieve the "smarts"/negotiation.

    For example, an AC adapter for USB Type C system block diagram is shown below. The buck converter only provides the regulation of ~21VDC to source the typical USB output voltages (3.3V, 5V, 9V, 15V, 20V). Notice how the buck converter interfaces with the DP controller which is similar to the TI design previously linked. 

    Regards,

    Jimmy