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RoadTest Review the TI LMZ36002EVM - Review

Scoring

Product Performed to Expectations: 10
Specifications were sufficient to design with: 10
Demo Software was of good quality: 10
Demo was easy to use: 10
Support materials were available: 10
The price to performance ratio was good: 8
TotalScore: 58 / 60
  • RoadTest: RoadTest Review the TI LMZ36002EVM
  • Buy Now
  • Evaluation Type: Independent Products
  • Application you used the part in: Robotic/Testing
  • Was everything in the box required?: Yes - null
  • Comparable Products/Other parts you considered: null
  • What were the biggest problems encountered?: null

  • Detailed Review:

    Simple Switcher Power Module LMZ36002EVM

     

     

    Description:

    LMZ36002EVM is a synchronous buck switching mode power module with input voltage range of 4.5V to 60V and output current up to 2A.

    Getting Started:

    Getting Started

     

     

    Video review:

     

     

     

    Measuring Power Efficiency:

    Measuring Efficiency

    The way I tested the power efficiency is by supplying 3 different input voltages (10v,20v,40v) and testing the output power within 3 different loads with three current values (0.5A,1A,2A).

    1. I set the adjustable DC voltage source to 10v on TB1 input and then set the load on the output TB2 to 0.5A then get the input current from the power source after setting the load on.

    2. Ste P1 to 2.5V and P2 to 300 kHz.

    3. Calculate the input power Pin=V x I watt.

    4. Read the output values: Vout, Iout, Pout

    5. Calculate the power efficiency:

    Power Efficiency = Pout/Pin

    I followed the same methodology with all the possible outputs on P1 (2.5V, 3.3V,5V,6V,7.5V) then I used the resulted values to draw a power efficiency chart with the three Input voltages and another one with all the possible output voltages see figure 1 and figure 2 below.

    PE VI\

    Figure (1) – Power Efficiency Vin= (10V,20V,40V)

     

    PE VO

    Figure (2) – Power Efficiency all possible Vout values

     

    PE Calc

     

    Figure (3) Power Measurement sheet.

     

            

    Vin(V)Iout(A)Iin(A)_Vout(V)Pin(W)Pout(W)EfficiencyP1(V)P2(kHz)Eff.Avg
    100.50.152.4871.51.20.82.53000.873334682
    2010.152.47932.50.8333333332.5300
    4020.152.46264.90.8166666672.5300
    100.50.23.29621.70.853.3300
    2010.23.28843.30.8253.3300
    4020.23.26886.60.8253.3300
    100.50.294.962.92.50.8620689665500
    2010.294.965.850.8620689665500
    4020.34.93129.90.8255500
    100.50.336.083.33.10.9393939396500
    2010.336.076.66.10.9242424246500
    4020.336.0513.212.10.9166666676500
    100.50.47.5643.80.957.5500
    2010.417.558.27.60.9268292687.5500
    4020.47.531615.10.943757.5500

     

     

    Measuring Noise:

    Measuring noise will include Switching Ripple Noise and Transient Noise.

     

    Switching Ripple Noise:

    SR Noise

    Connect the Oscilloscope probe on channel 1 to J2 using short ground wire.

    SR Noise P

     

    OSC SRN

    The measured noise is about 20.8mV

     

    Transient Noise:

    T Noise

    Using the same testing technique by connecting the short ground probe to the output TB2 I had a noise frequency of 384.6 MHz.

    TR Noise p

    SRN OSC

    Robotics4Fun

    I will be doing a stability measurement test later and then I am going to use the power module in an application test to run a robot "Renbot", an additional video will be posted on my channel later "Robotics4Fun" with a video detailed testing review and robotic application.

     

    https://www.youtube.com/channel/UCzj1PSktcIZHxgNXQ2Sk3VA


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