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TPS65400: Inquiry on usage efficiency

JH Shin
Guru 10940 points
Part Number: TPS65400

Hello,

My customer has requested accurate efficiency information for the usage conditions below.

Please provide usage efficiency values for the five cases below.

CASE 1

Device Input Voltage Input Current Output Voltage Output Current Efficiency (%) Dissipated Power
(V) (A) (V) (A) 25 ℃ 80 ℃ (W)
TPS65400_C1 12 0.1 0.9 1 　 　 0.3
TPS65400_C2 12 0.16 1.2 1.3 　 　 0.34
TPS65400_C3 12 0.11 1.2 0.9 　 　 0.25
TPS65400_C4 12 0.25 1.8 1.4 　 　

0.44

CASE 2

Device Input Voltage Input Current Output Voltage Output Current Efficiency (%) Dissipated Power
(V) (A) (V) (A) 25 ℃ 80 ℃ (W)
TPS65400_C1 12 0.17 0.925 1.75 　 　 0.46
TPS65400_C2 12 0.17 0.925 1.75 　 　 0.46
TPS65400_C3 12 0.24 1.8 1.35 　 　 0.46
TPS65400_C4 12 0.24 1.8 1.35 　 　 0.46

CASE 3

Device Input Voltage Input Current Output Voltage Output Current Efficiency (%) Dissipated Power
(V) (A) (V) (A) 25 ℃ 80 ℃ (W)
TPS65400_C1 12 0.15 1.2 1.2 　 　 0.36
TPS65400_C2 12 0.58 5.5 1.14 　 　 0.7
TPS65400_C3 12 0.26 5 0.5 　 　 0.63
TPS65400_C4 12 0.15 3.7 0.4 　 　 0.37

CASE 4

Device Input Voltage Input Current Output Voltage Output Current Efficiency (%) Dissipated Power
(V) (A) (V) (A) 25 ℃ 80 ℃ (W)
TPS65400_C1 12 0.17 0.925 1.75 　 　 0.46
TPS65400_C2 12 0.17 0.925 1.75 　 　 0.46
TPS65400_C3 12 0.24 1.8 1.35 　 　 0.46
TPS65400_C4 12 0.24 1.8 1.35 　 　 0.46

CASE 5

Device Input Voltage Input Current Output Voltage Output Current Efficiency (%) Dissipated Power
(V) (A) (V) (A) 25 ℃ 80 ℃ (W)
TPS65400_C1 12 0.15 1.2 1.2 　 　 0.36
TPS65400_C2 12 0.58 5.5 1.14 　 　 0.7
TPS65400_C3 12 0.26 5 0.5 　 　 0.63
TPS65400_C4 12 0.17 3.3 0.5 　 　 0.41

Thank you.

JH

  • 0
    TI__Mastermind 30271 points

    Hi JH,

    Let me check and get back to you soon. Thanks!

    BRs

    Lucia

  • 0
    TI__Mastermind 30271 points

    Hi JH,

    We have webench simulation tool to estimate the efficiency with different VIN, VOUT, load current and temp conditions. Please kindly change the condition and you can get the efficiency data.

    https://webench.ti.com/power-designer/switching-regulator/customize/111?VinMin=4.5&VinMax=18&O1V=1.8&O1I=4&base_pn=TPS65400&AppType=Dual&Flavor=Dual&op_TA=30&origin=pf_panel&lang_chosen=en-US&optfactor=3&Topology=Buck&flavor=Dual&VoltageOption=Dual&O2V=1.8&O2I=4

    Thanks!

    BRs

    Lucia