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TPS1H100-Q1: List of tech inquiries

Art Mecina
Genius 16655 points
Part Number: TPS1H100-Q1

Hello Guys,

Good day.

Our customer have a list of tech inquiries for TPS1H100AQPWPRQ1 were hoping you could help us with.

1)  What is the output voltage range of the current sensor? The datasheet says its 0-4V, is that correct? they are looking for a 0-5V output range for input into an ADC.

2) the chip has 3 output pins, 5,6, and 7. They are only driving a single load with this chip. Does they need to connect 5,6,7 all to the same node? Or if they connect pin 5 to the load, can they leave 6/7 floating?

3) Can the Voltage on the current sense operate in a range of 0-5V or is limited to a 0-4V range?

4) Does the PWM input need to come from a microcontroller digital output, or can they generate the PWM input using a 555 timer or some other pulse generator?

5) if the maximum current of their load can draw 3A, is this chip sufficient for an application where the load may draw 2-2.5A for sustained periods of time? If so, how can they calculate the total power dissipated by the chip?

Thanks in advance!

Art

  • 0
    TI__Mastermind 34935 points

    Art,

    1) The SNS pin will output a current. You can size the resistor on the SNS pin to be whatever voltage will suit your ADC's reference voltage. In the case of a fault (open load, current limit, thermal fault, etc.) the SNS pin will be pulled to an internal reference (VCS,H in the datasheet) to represent a fault.

    2) It is recommended that you connect all output pins to the load to minimize the stress and thermal impact of the VOUT bond wire. Normally you just put a big copper polygon pour over all of the VOUT pins.

    3) See #1

    4) You can use whatever you want to generate the PWM- but normally a microcontroller is used. The upper limit of the PWM will be around 1Khz.

    5) For the TPS1H100-Q1 you can use it in steady state DC operation of 4A.