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TPS2H000-Q1: TPS2H000-Q1

Lokesh Nelavalli
Prodigy 90 points
Part Number: TPS2H000-Q1
Other Parts Discussed in Thread: TPS2H160-Q1, TPS1H000-Q1, TPS1H100-Q1

Tool/software:

Hi Team,

I'm looking for a high-side power switch IC that can support a wide load current range from 20 mA to 2.5 A. The required operating voltage range is from 4 V to 40 V. Please recommend any suitable part numbers available.

Regards,

Lokesh

  • 0
    TI__Expert 7821 points

    Hi Lokesh,

    Can you please be more specific? What will be the maximum nominal load current? What is the target current limit? How many channels are needed?

    Thanks,

    Rishika Patel 

  • 0 in reply to Rishika Patel
    Prodigy 90 points

    Hi patel,

    The maximum load current is 2.5A or higher, and the minimum load current is 20mA. The current limit is set to 20mA; if this is not met, it increases to 50mA; if still not met, the condition is considered OK. The output channels can be either 1 or 2 . The operating voltage range is from a minimum of 4V up to 40V or higher, But IC is automotive standard .

  • 0 in reply to Lokesh Nelavalli
    TI__Expert 7821 points

    Hi Lokesh,

    The lowest current limit that can be set by any of our high-side switches is 50mA using the TPS1H000-Q1 or the TPS2H000-Q1. However, the maximum nominal load current is 0.9A for the TPS1H000-Q1 and 0.75A for the TPS2H000-Q1. Then, the next smallest current limit that can be set with a higher maximum nominal load current of 2.5A is 0.25A (maximum current limit is 7A) using the TPS2H160-Q1.

    Thanks,

    Rishika Patel 

  • 0 in reply to Rishika Patel
    Prodigy 90 points

    Hi patel,

    We have not set any external current limit. The CL pin is connected directly to ground. The load current varies depending on the load, ranging from a minimum of 20 mA to a maximum of 2.5 A. We change the load resistor to achieve these currents.

    The IC is capable of supplying load currents from 20 mA up to 2.5 A at 12 V / 24V Input/output voltage?

    According to the datasheet and the internal current limit is fixed at 10 A when the CL pin is grounded.

    When we tested with a 12 V input and a 600 Ω load resistor, we measured approximately 20 mA output current, which is expected. However, when we changed the load resistor to 4.8 Ω with the same 12 V input, the output voltage and current fluctuated, and sometimes we did not get any output voltage at all.

    Next, we tested with a load resistor set for about 500 mA output current. In this case, the output voltage dropped to 8 V while the input remained at 12 V. Why is there a 4 V voltage drop in this situation?

    All these tests were performed with the CL pin connected directly to ground (0 Ω)

    Please suggest an IC that supports load currents ranging from 20 mA up to 2.5 A without any fixed output current limit. We want the output current to vary freely according to the load within this range, without the IC enforcing a fixed current limit.

    We have been using the TPS1H100AQPWPRQ1 IC, which works well at low currents such as 20 mA. However, it does not seem to support load currents above 500 mA up to 2.5 A properly. Why is the IC unable to handle higher load currents in this range?

  • 0 in reply to Lokesh Nelavalli
    TI__Expert 7821 points

    Hi Lokesh,

    I am working on this and I will get back to you.

    Thanks,

    Rishika Patel 

  • 0 in reply to Rishika Patel
    TI__Expert 7821 points

    Hi Lokesh,

    The TPS1H100-Q1 should support currents above 500mA. 

    Was an EVM used for those tests or customer board? 

    What does the ST pin read when the voltage drops? Do you have any waveforms? 

    Is the load resistor a power resistor or an e-load?  

    If the nominal load current is 20mA-2.5A, then the TPS1/2H000-Q1 will not work, but the TPS2H160-Q1 can. 

    Thanks,

    Rishika Patel