# 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
• 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:

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) Efficiency P1(V) P2(kHz) Eff.Avg 10 0.5 0.15 2.487 1.5 1.2 0.8 2.5 300 0.873334682 20 1 0.15 2.479 3 2.5 0.833333333 2.5 300 40 2 0.15 2.462 6 4.9 0.816666667 2.5 300 10 0.5 0.2 3.296 2 1.7 0.85 3.3 300 20 1 0.2 3.288 4 3.3 0.825 3.3 300 40 2 0.2 3.268 8 6.6 0.825 3.3 300 10 0.5 0.29 4.96 2.9 2.5 0.862068966 5 500 20 1 0.29 4.96 5.8 5 0.862068966 5 500 40 2 0.3 4.93 12 9.9 0.825 5 500 10 0.5 0.33 6.08 3.3 3.1 0.939393939 6 500 20 1 0.33 6.07 6.6 6.1 0.924242424 6 500 40 2 0.33 6.05 13.2 12.1 0.916666667 6 500 10 0.5 0.4 7.56 4 3.8 0.95 7.5 500 20 1 0.41 7.55 8.2 7.6 0.926829268 7.5 500 40 2 0.4 7.53 16 15.1 0.94375 7.5 500

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.