• State TI Thinks Resolved
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 61 subscribers
  • Views 26 views
  • Users 0 members are here
Support feedback
Options
Options
Related

TPS2H160-Q1: Can TPS2H160 control output channel individually?

Shu Kei Sin
Prodigy 10 points
Part Number: TPS2H160-Q1


Hi all,

  Sorry for asking 3 stupid questions as I'm a newbie of power managemant. I cannot fully understand the turth table (Table 2, sec 8.3.5.2 @ p.19 in the dasheet).

  1) Can TPS2H160 control output channel individually? It has 2 output channel (OUT1 & OUT2). But it has only one control pin for enable/disable (DIAG_EN). Is it mean that both channel need to either be on or off in the same time?

  2) When overload occurs, the INx pins will be H or L (Is H mean logic high and L mean Logic low?). But pin function section (sec 6 @ p.4) mentioned that INx are inputs. So does it means that I need to provide a logic high to check if OUTx is shorted to ground & provide a logic high to check if OUTxs' polarity is reversed? Or INx can act as I/O?

  3) For thermal shutdown, fault recover will occurs if INx is toggled. Does it means I cannot stop diagnostics (pull down INx) if thermal shutdown occurs? What will happen if I force pull low? Especally if THER is pull-up, fault cannot recover automatically. Does it mean I need to keep toggling INx to check if the temperature goes down to a suitible level?

  Sorry if I missed some of the detail in the datasheet. Many thanks :)

Best Regards,

Sin

  • 0
    TI__Mastermind 30440 points

    Hi Sin,

    Welcome to e2e and the power management area!

    1. Each channel is controlled with the relevant INx pin, so each channel can be individually controlled. On some of our devices, the enable is called IN, and on others it is called EN.

    The supply voltage is named VS.

    DIAG_EN is the diagnostic enable signal, so it will enable the CS/FAULT/STx pins.

    2. Yes, H is logic high and L is logic low, the thresholds are in the Electrical Characteristics table near the top of the data sheet. The only way for an overload to happen is if the respective channel is on, so if INx is high. If there is an overload, the STx or the FAULT pin (depending on which device version you use) will go low, which can be read with an MCU GPIO or other circuit.

    3. If THER is pulled up and the device goes into thermal shutdown, INx (enable) will need to be toggled to reenable the device. If THER is low, the device will auto-retry after going into thermal shutdown. When the device has exited thermal shutdown, STx/FAULT will go back high.

    Diagnostics (DIAG_EN) can be turned on or off at any time.

    Does this help?

    Thanks,

    Patrick