RoadTest Review the TI LMZ36002EVM - Review

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RoadTest: RoadTest Review the TI LMZ36002EVM

Author: Molham

Creation date:

Evaluation Type: Independent Products

Did you receive all parts the manufacturer stated would be included in the package?: True

What other parts do you consider comparable to this product?: 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:

 

 

Video review:

 

 

 

Measuring Power 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.

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

 

Figure (2) – Power Efficiency all possible Vout values

 

 

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:

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

 

The measured noise is about 20.8mV

 

Transient 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.

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

Anonymous

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