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TPS1HC30-Q1: High side mosfet switch options integrated TPS1HC30 or TPS4800 + ext. mosfet

Tanmay Sutaria
Prodigy 155 points
Part Number: TPS1HC30-Q1
Other Parts Discussed in Thread: LM5117, TPS281C100, LM5060, TPS2400

Hello,

We are developing regulated current sources using the LM5117 in multiple current ranges and wish to add a series mosfet switch Q4 in the output as in the attached schematic.

For a reduced component count we would like to use an integrated solution or mosfet + controller solution as listed below.
1. High Side Switch TPS1HTC30(or similar) for currents < 6A.
2. High Side Controller TPS4800(or similar) + ext. mosfet for currents 10A and higher.
3. Is the ‘Ideal diode/ORing controllers’ + mosfets also a suitable option if we omit the the series diode across mosfet? Or is this not recommended?

It would be ideal if the switch can be controlled directly from a uC GPIO or as few interface components as possible.
Kindly suggest the best suited scheme and external mosfets for currents from 100mA to 20A.

Thanks and regards,
Tanmay Sutaria.

  • 0
    TI__Mastermind 30215 points

    Tanmay,

    For the integrated high-side switch devices, please refer to the following table:

    Part Number

    Channels

    Ron (mΩ)

    Imax (A)

    Current limit (min) (A)

    Current limit (max) (A)

    TPS2H000-Q1

    2

    1000

    0.75

    0.05

    1.3

    TPS4H000-Q1

    4

    1000

    0.75

    0.1

    1.3

    TPS1H000-Q1

    1

    1000

    0.9

    0.05

    1

    TPS2HB50-Q1

    2

    50

    2

    2

    18

    TPS1H200A-Q1

    1

    200

    2

    0.25

    5

    TPS1HC100-Q1

    1

    100

    2.5

    0.633

    6.9

    TPS2H160-Q1

    2

    160

    2.5

    0.25

    7

    TPS4H160-Q1

    4

    160

    2.5

    0.25

    7

    TPS2HB35-Q1

    2

    35

    3

    2

    25

    TPS1HB50-Q1

    1

    50

    4

    2

    26

    TPS1H100-Q1

    1

    100

    4

    0.5

    7

    TPS1HC30-Q1

    1

    30

    5

    1.2

    12

    TPS1HB35-Q1

    1

    35

    5

    2

    33

    TPS2HB16-Q1

    2

    16

    5

    4.1

    48.5

    TPS1HTC30-Q1

    1

    30

    6

    2

    16

    TPS1HB16-Q1

    1

    16

    7

    4.4

    49

    TPS27SA08-Q1

    1

    9

    10

    20

    20

    TPS1HB08-Q1

    1

    8

    10

    6.4

    70

    TPS1HA08-Q1

    1

    8

    10

    20

    80

    TPS2HCS10-Q1

    2

    11

    12

    This is assuming this is an automotive application. I will loop in the team responsible for external FET/ideal diodes to suggest parts for those.

    Best Regards,
    Tim

  • 0 in reply to Timothy Logan
    Prodigy 155 points

    Hi Timothy,

    Thanks for the quick response.The application is an current source for industrial T&M application.

    I did study the parts/table you have shared. Since our Vin max goes upto 50V only two smart switch parts seem suitable TPS1HC30 and TPS281C100. Please let me know if any other would be suitable.
    My main query is - Can these devices be used in  the application / scheme I have shared? We will use GPIO/Control as required but other than that any other additions like snubber or level shifter or any such requirement?

    Regarding the High side switch controllers, only two parts TPS4800 & TPS4811 are rated beyond 50V. Will these be suitable for this application? TPS4800 is still in Preview and TPS4811 is out of stock. Any other part suggestions?

    Please let me know about parts under your purview and do loop in the concerned team for ext. FET/eFuse/ideal diode parts.

    Thanks and regards,
    Tanmay.

  • 0 in reply to Tanmay Sutaria
    Prodigy 155 points

    Can we use the eFuse/not swap controllers also for this application - TPS2400 and LM5060?

    Thanks and regards,
    Tanmay.

  • 0 in reply to Tanmay Sutaria
    TI__Guru** 104981 points

    Hi Tanmay,

    What is the purpose of Q4 in your scheme? Just ON/OFF for path control - if yes, high side switches like TPS4800 and TPS4811 are perfect fit. These come with strong gate drive and provide better voltage margin for 50V operating voltage.

    BR,

    Rakesh

  • 0 in reply to Rakesh
    Prodigy 155 points

    Hi Rakesh,

    Thanks for the response
    The purpose is to have multiple CC set points. We will have 2or3 sets of Q4 + R3 in parallel with different values of R3. Whichever mosfet is enabled, current will flow through the respective shunt and that will be the feedback resistor for the CC loop. Load side of all shunts can be common. Mosfet-Shunt junction signal will be fed to opamp via analog mux.

    I agree, the TPS4800, 4811 are suited, but TPS4800 is still in Preview and TPS4811 is out of stock. What can we use to kick of the design or till TPS4800 comes into production?

    As an alternative, eFuse would be useful for an extra layer of Over current protection if suitable for this location in the schematic. Can we use parts from eFuse/Hot swap/Ideal diode ranges like TPS2400 or LM5060 for this application? Pls do suggest any similar/more suited parts if available.

    Best regards,
    Tanmay.

  • 0 in reply to Tanmay Sutaria
    Prodigy 155 points

    Hi Rakesh / Timothy,

    Please refer to this fundamental issue before responding to my previous message.

    Our design operates the LM5117 in CC mode so output from the regulator would be in the 3.5 - 50V range. If the CC source output is used as the Vcc for the high side drivers of the series mosfet, they would would get a variable supply in the same range. Is this possible and advisable ofcourse if the OVP/UVP limits are not breached?

    A solution could be that the high side driver can be powered from the 55V which powers the LM5117 input but the supply to the series pass mosfet would be from the output of the LM5117 in the 3.5V to 50V range. (Or even lower 1V-50V range for very low impedance load). Can the driver take the gate voltage in the range required for such low Vds? I guess Vds would be 1V but Vgs will have to be in the 5-10V range while Vcc is 55V.

    If this is not feasible, please suggest an option to drive the mosfet.

    Best regards,
    Tanmay.

  • 0 in reply to Tanmay Sutaria
    TI__Guru** 104981 points

    Hi Tanmay,

    Do you have local TI sales contact to reach out for TPS4811 samples ? the other alternative is LM5060. 

    The controller should be powered from the same voltage as the drain of Q4 for proper operation. So, LM5060 is not suitable and TPS4811 can work down till 3.5V. 

    BR,

    Rakesh

  • 0 in reply to Rakesh
    Prodigy 155 points

    Hi Rakesh,

    Have sent additional details a few days ago via private message as it contains proprietary details.
    Please revert at the earliest possible.
    If this thread will be assigned to someone else, please advise the same too.

    Best regards,
    Tanmay Sutaria.

  • 0 in reply to Tanmay Sutaria
    TI__Guru** 104981 points

    sure.. i will respond to that private message

  • 0 in reply to Rakesh
    Prodigy 155 points

    Thanks for your revert. Have sent response for clarity and to close the queries.

    BR,
    Tanmay.