Texas Instruments 12V Input, Dual 5.0V and 3.3V Output, 2A Buck Converter Evaluation Module TPS54383EVM TPS54383EVM 데이터 시트

제품 코드

TPS54383EVM

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4.2

Equipment Setup

4.2.1

Procedure

4.2.2

Diagram

LOAD1

5.0V @

FAN

See Tip and Barrel

Measurement for Vout

ripple

VIN

Oscilloscope

1MW, AC

20mV / div

20MHz

LOAD2

3.3V @

Test Set Up

Shown in

Figure 2

is the basic test set up recommended to evaluate the TPS54383EVM. Please note that

although the return for J1, J2 and JP3 are the same system ground, the connections should remain
separate as shown in

Figure 2

1. Working at an ESD workstation, make sure that any wrist straps, bootstraps or mats are connected

referencing the user to earth ground before power is applied to the EVM. Electrostatic smock and
safety glasses should also be worn.

2. Prior to connecting the dc input source, VIN, it is advisable to limit the source current from VIN to 5.0 A

maximum. Make sure VIN is initially set to 0 V and connected as shown in

Figure 2

3. Connect the ammeter A1 (0-5 A range) between VIN and J1 as shown in

Figure 2

4. Connect voltmeter V1 to TP1 and TP2 as shown in

Figure 2

5. Connect LOAD1 to J2 as shown in

Figure 2

. Set LOAD1 to constant current mode to sink 0 A

before

VIN is applied.

6. Connect voltmeter, V2 across TP3 and TP4 as shown in

Figure 2

7. Connect LOAD2 to J3 as shown in

Figure 2

. Set LOAD2 to constant current mode to sink 0 A

before

VIN is applied.

8. Connect voltmeter, V3 across TP18 and TP19 as shown in

Figure 2

9. Place fan as shown in

Figure 2

and turn on, making sure air is flowing across the EVM.

Figure 2. TPS54383EVM Recommended Test Set-Up

SLUU285C – July 2007 – Revised January 2008

A 12-V Input, 5.0-V and 3.3-V Output, 2-A Non-Synchronous Buck Converter

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