Texas Instruments TPS54326EVM-540 Скачать руководство пользователя страница 3 | Manualshive

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Texas Instruments TPS54326EVM-540 Скачать руководство пользователя страница 3

1.3 Modifications

These evaluation modules are designed to provide access to the features of the TPS54326. Some modifications
can be made to this module.

1.3.1 Output Voltage Set Point

To change the output voltage of the EVMs, it is necessary to change the value of resistor R1. Changing the
value of R1 can change the output voltage above 0.765V. The value of R1 for a specific output voltage can be
calculated using

and

For output voltage from 0.76V to 2.5V:

O

R1

V

= 0.765

1+

R2

æ

ö

´ ç

÷

è

ø

(1)

For output voltage over 2.5V:

O

O

R1

V

= (0.763 + 0.0017

V )

1+

R2

æ

ö

´

´ ç

÷

è

ø

(2)

lists the R1 value for some common output voltages. For higher output voltages, a feed forward

capacitor is required. Pads for this component (C2) are provided on the printed circuit board. C2 is used for
faster load transient response and is recommended for auto skip mode stability. Note that the values given in

are standard values, and not the exact value calculated using

Table 1-3. Output Voltages

Output Voltage

(V)

R1

(kΩ)

R2

(kΩ)

C2

(pF)

L1

(µH)

1.0

6.81

22.1

1.5

1.05

8.25

22.1

1.5

1.2

12.7

22.1

1.5

1.8

30.1

22.1

10 - 47

2.2

2.5

49.9

22.1

10 - 47

2.2

3.3

73.2

22.1

10 - 47

2.2

5.0

121

22.1

10 - 47

3.3

Introduction

SLVU353A – NOVEMBER 2009 – REVISED OCTOBER 2021

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TPS54326 Step-Down Converter Evaluation Module User's Guide

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Copyright © 2021 Texas Instruments Incorporated

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Содержание TPS54326EVM-540

Страница 1: ...lation 6 Figure 2 4 TPS54326EVM 540 Load Transient Response 6 Figure 2 5 TPS54326EVM 540 Output Voltage Ripple 7 Figure 2 6 TPS54326EVM 540 Input Voltage Ripple 7 Figure 2 7 TPS54326EVM 540 Start Up 8 Figure 2 8 TPS54326 540 Switching Frequency 8 Figure 3 1 Top Assembly 9 Figure 3 2 Top Layer 10 Figure 3 3 Internal Layer 1 10 Figure 3 4 Internal Layer 2 11 Figure 3 5 Bottom Layer 11 Figure 3 6 Bot...

Страница 2: ... at light loads The TPS54326 dc dc synchronous converter is designed to provide up to a 2A output from an input control voltage source of 4 5V to 18V input power voltage source of 2V to 18V and output voltage from 0 76V to 5 5V Rated input voltage output voltage and output current range for the evaluation module are given in Table 1 1 Table 1 1 Input Voltage and Output Current Summary EVM Input Vo...

Страница 3: ... R1 value for some common output voltages For higher output voltages a feed forward capacitor is required Pads for this component C2 are provided on the printed circuit board C2 is used for faster load transient response and is recommended for auto skip mode stability Note that the values given in Table 1 3 are standard values and not the exact value calculated using Table 1 3 Table 1 3 Output Vol...

Страница 4: ...convenient ground reference TP8 is used to monitor the output voltage with TP9 as the ground reference Table 2 1 Connection and Test Points Reference Designator Function J1 VIN see Table 1 1 for VIN range J2 VOUT 1 05 V at 3 A maximum JP1 EN control Connect EN to OFF to disable connect EN to ON to enable TP1 VIN test point at VIN connector TP2 GND test point at VIN TP3 EN test point TP4 VCC test p...

Страница 5: ... Load Regulation The load regulation for the TPS54326EVM 540 is shown Figure 2 2 0 3 0 0 3 0 6 0 9 1 2 0 0 5 1 1 5 2 2 5 3 3 5 I Output Current A O Output Voltage Deviation V 5 V I V 12 V I Figure 2 2 TPS54326EVM 540 Load Regulation www ti com Test Setup and Results SLVU353A NOVEMBER 2009 REVISED OCTOBER 2021 Submit Document Feedback TPS54326 Step Down Converter Evaluation Module User s Guide 5 Co...

Страница 6: ...load transient is shown in Figure 2 4 The current step is from 0 75 A to 2 25 A 25 to 75 of rated load Total peak to peak output voltage variation is as shown V 50 mV div AC Coupled O I 1 A div 0 75 to 2 25 A Load Step O t Time 200 s div m Figure 2 4 TPS54326EVM 540 Load Transient Response Test Setup and Results www ti com 6 TPS54326 Step Down Converter Evaluation Module User s Guide SLVU353A NOVE...

Страница 7: ... Input Voltage Ripple The TPS54326EVM 540 input voltage ripple is shown in Figure 2 6 The output current is the rated full load of 3A V 50 mV div AC Coupled I t Time 500 ns div Switching Node 5 V div Figure 2 6 TPS54326EVM 540 Input Voltage Ripple www ti com Test Setup and Results SLVU353A NOVEMBER 2009 REVISED OCTOBER 2021 Submit Document Feedback TPS54326 Step Down Converter Evaluation Module Us...

Страница 8: ...40 switching frequency is shown in Figure 2 8 500 600 700 800 900 0 5 10 15 20 V Input Voltage V I f Switching Frequency kHz sw V 1 8 V O V 3 3 V O I 1 A O Figure 2 8 TPS54326 540 Switching Frequency Test Setup and Results www ti com 8 TPS54326 Step Down Converter Evaluation Module User s Guide SLVU353A NOVEMBER 2009 REVISED OCTOBER 2021 Submit Document Feedback Copyright 2021 Texas Instruments In...

Страница 9: ...hat connects VIN to VCC and R4 the power good pull up are located on the back side Analog ground and power ground are connected at a single point on the top layer near pin 5 of the TPS54326 The internal layer 1 is a split plane containing analog and power grounds The internal layer 2 is primarily power ground There are also a fill area of VIN and a trace routing VCC to the enable control jumper JP...

Страница 10: ...ure 3 3 Internal Layer 1 Board Layout www ti com 10 TPS54326 Step Down Converter Evaluation Module User s Guide SLVU353A NOVEMBER 2009 REVISED OCTOBER 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Страница 11: ...2 Figure 3 5 Bottom Layer www ti com Board Layout SLVU353A NOVEMBER 2009 REVISED OCTOBER 2021 Submit Document Feedback TPS54326 Step Down Converter Evaluation Module User s Guide 11 Copyright 2021 Texas Instruments Incorporated ...

Страница 12: ...ttom Assembly Board Layout www ti com 12 TPS54326 Step Down Converter Evaluation Module User s Guide SLVU353A NOVEMBER 2009 REVISED OCTOBER 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Страница 13: ...hematic Figure 4 1 is the schematic for the TPS54326EVM 540 Figure 4 1 TPS54326EVM 540 Schematic Diagram www ti com Schematic Bill of Materials and Reference SLVU353A NOVEMBER 2009 REVISED OCTOBER 2021 Submit Document Feedback TPS54326 Step Down Converter Evaluation Module User s Guide 13 Copyright 2021 Texas Instruments Incorporated ...

Страница 14: ...hip 1 16W 1 0603 Std Std R5 0 Open Resistor Chip 1 16W 1 0603 Std Std TP1 TP3 TP4 TP6 TP7 TP8 TP9 3 5000 Test Point Red Thru Hole Color Keyed 0 100 x 0 100 inch 5000 Keystone TP2 TP5 TP9 3 5001 Test Point Black Thru Hole Color Keyed 0 100 x 0 100 inch 5001 Keystone U1 1 TPS54326PWP IC 2 A Output Single Sync Step Down TPS54326PWP TI 1 Shunt 100 mil Black 0 100 929950 00 3M 1 PCB 2 76 In x 1 97 In x...

Страница 15: ...other than TI b the nonconformity resulted from User s design specifications or instructions for such EVMs or improper system design or c User has not paid on time Testing and other quality control techniques are used to the extent TI deems necessary TI does not test all parameters of each EVM User s claims against TI under this Section 2 are void if User fails to notify TI of any apparent defects...

Страница 16: ... These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation...

Страница 17: ...y for convenience and should be verified by User 1 Use EVMs in a shielded room or any other test facility as defined in the notification 173 issued by Ministry of Internal Affairs and Communications on March 28 2006 based on Sub section 1 1 of Article 6 of the Ministry s Rule for Enforcement of Radio Law of Japan 2 Use EVMs only after User obtains the license of Test Radio Station as provided in R...

Страница 18: ... any interfaces electronic and or mechanical between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to minimize the risk of electrical shock hazard User assumes all responsibility and liability for any improper or unsafe handling or use of the EVM by User or its employees affiliates contractors or designees 4 4 User assumes all...

Страница 19: ...OR DAMAGES ARE CLAIMED THE EXISTENCE OF MORE THAN ONE CLAIM SHALL NOT ENLARGE OR EXTEND THIS LIMIT 9 Return Policy Except as otherwise provided TI does not offer any refunds returns or exchanges Furthermore no return of EVM s will be accepted if the package has been opened and no return of the EVM s will be accepted if they are damaged or otherwise not in a resalable condition If User feels it has...

Страница 20: ...o change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reproduction and display of these resources is prohibited No license is granted to any other TI intellectual property right or to any third party intellectual property right TI disclaims responsibility for and you will fully indemn...

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