Texas Instruments TPS65270 Manual de usuario

User’s Guide

TPS65270 Buck Converter Evaluation Module User's

Guide

Table of Contents

1 Introduction.............................................................................................................................................................................2

2 Background.............................................................................................................................................................................3

3 Schematic................................................................................................................................................................................4

4 Board Layout...........................................................................................................................................................................5

5 Bench Test Setup Conditions................................................................................................................................................ 6

5.1 Headers Description and Jumper Placement.....................................................................................................................6

5.2 Jumpers..............................................................................................................................................................................7

6 Power-Up Procedure.............................................................................................................................................................. 8

7 Bill of Materials....................................................................................................................................................................... 9

8 Revision History......................................................................................................................................................................9

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www.ti.com Table of Contents

SLVU474C – AUGUST 2011 – REVISED MAY 2021

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TPS65270 Buck Converter Evaluation Module User's Guide 1

1 Introduction

This document presents the information required to power the TPS65270 PMIC as well as the support

documentation including schematic and bill of materials.

Introduction www.ti.com

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2 Background

The TPS65270 PMIC is designed to provide 2-A and 3-A continuous currents with an operational range of 4.5 V

to 16 V and an externally set switching frequency ranging from 300 kHz to 1.4 MHz. When the PMIC is not fully

loaded, Buck1 can be loaded to 2.5 A and Buck2 to 3.5 A.

As there are many possible options to set the converters, Table 2-1 presents the performance specification

summary for the EVM.

Table 2-1. Input Voltage and Output Current Summary

EVM TEST CONDITIONS OUTPUT CURRENT RANGE

TPS65270EVM VIN = 4.5 V to 16 V

fsw = 620 kHz

Buck1, 1.8 V, up to 2 A

Buck2, 1.2 V, up to 3 A

(25°C ambient)

This evaluation module is designed to provide access to the features of the TPS65270. Some modifications

can be made to this module to test performance at different input and output voltages, current and frequency

operation. Please contact TI Field Applications Group for advice on these matters.

www.ti.com Background

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TPS65270 Buck Converter Evaluation Module User's Guide 3

3 Schematic

Figure 3-1. TPS65270 Schematic

Schematic www.ti.com

4TPS65270 Buck Converter Evaluation Module User's Guide SLVU474C – AUGUST 2011 – REVISED MAY 2021

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4 Board Layout

Figure 4-1. Placement (Top Layer)

Figure 4-2. Board Layout (Top Layer)

Figure 4-3. Board Layout (Bottom Layer)

www.ti.com Board Layout

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TPS65270 Buck Converter Evaluation Module User's Guide 5

5 Bench Test Setup Conditions

5.1 Headers Description and Jumper Placement

VIN

VOUT1

VOUT2

12V

GND

JP3/LOW_P

JP2/EN2

JP1/ EN1

Figure 5-1. Headers Description and Jumper Placement

Test points:

A: LX of VOUT1

B: LX of VOUT2

VOUT1, VOUT2, VCC, EN1, EN2, LOW_P

Bench Test Setup Conditions www.ti.com

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5.2 Jumpers

Table 5-1. Jumpers

JUMPER

NO. FUNCTION PLACEMENT COMMENT

JP1 BUCK1 enable (EN1)

Connect EN1 to GND to disable VOUT1, connect

EN1 to VIN to enable VOUT1;

Leave open to enable VOUT1

JP2 BUCK2 enable (EN2)

Connect EN2 to GND to disable VOUT2, connect

EN2 to VIN to enable VOUT2;

Leave open to enable VOUT2

JP3 Low Power Mode (LOW_P)

Connect LOW_P to GND to enter forced PWM

mode; Connect LOW_P to VCC to enter automatic

PSM/PWM mode

Cannot leave open

www.ti.com Bench Test Setup Conditions

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TPS65270 Buck Converter Evaluation Module User's Guide 7

6 Power-Up Procedure

1. Apply 4.5 V - 16 V to J3.

2. Toggle JP1 or JP2 to enable VOUT1 and VOUT2 respectively.

3. Apply loads to the output connectors.

Power-Up Procedure www.ti.com

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7 Bill of Materials

Table 7-1. Bill of Materials

ITEM QUANTITY DESIGNATOR VALUE FOOTPRINT MANUFACTURER DESCRIPTION

1 2 C1, C7 4.7nF 603 Generic CAP 4700PF 50V CERAMIC

X7R 0603

2 2 C2, C6 10nF 603 Generic CAP 10000PF 50V CERM X7R

0603

3 2 C3, C5 2.2nF 603 Generic CAP 2200PF 50V CERAMIC

X7R 0603

4(1) 2 C3A, C5A 100pF 603 Generic CAP100PF 50V CERAMIC X7R

0603

5 2 C9, C13 10uF 1210 Generic CAP 10UF 35V CERAMIC X5R

1210

6 1 C4 10uF 603 Generic CAP CER 10UF 10V X5R 20%

0603

7 2 C8, C12 47nF 603 Generic CAP 47000PF 50V CERAMIC

X7R 0603

8 2 C10, C14 22uF 1210 Generic CAP 22UF 16V CERAMIC X5R

1210

9(1) 2 C11, C15 82pF 603 Generic CAP 82PF 50V CERAMIC X7R

0603

10 3 J1, J2, J3 ED555/2DS TB_2X3.5MM Onshore technology Inc Terminal Block, 2-pin, 6-A,

3.5mm

11(2) 3 JP1, JP2, JP3 NA JMP0.3 Mil Max/Generic

SIP HEADER 64

POS STRAIGHT PCB

(800-10-064-10-001000 )

12 2 L1, L2 4.7uH IND_744311470 Wurth Electronics Inc Magnetic-Core Inductor

13 2 R1, R2 10K 603 Generic RES 10.0K OHM 1/10W 1%

0603 SMD

14 2 R4, R5 0 603 Generic RES 0 OHM 1/10W 1% 0603

SMD

15 2 R4A, R5A 40.2K 603 Generic RES 40.2K OHM 1/10W 1%

0603 SMD

16 1 R4B 32.4K 603 Generic RES 32.4K OHM 1/10W 1%

0603 SMD

17 1 R5B 80.6K 603 Generic RES 80.6K OHM 1/10W 1%

0603 SMD

18 2 R6, R7 200K 603 Generic RES 200K OHM 1/10W 1%

0603 SMD

19 1 R8 383K 603 Generic RES 3830K OHM 1/10W 1%

0603 SMD

20 2 R13, R24 47 603 Generic RES 47 OHM 1/10W 1% 0603

SMD

21 3 TP1, TP2, TP3 5001 TH-40 Keystone Electronics Test Point, Black, Thru Hole

Color Keyed

22 5 TP5, TP6, TP7,

TP8, TP9 5002 TH-40 Keystone Electronics Test Point, White, Thru Hole

Color Keyed

23 1 U1 NA RGE24 Texas Instruments 'TPS65270RGE24

24(3) 4 NA NA NA 3M SJ-5303 (CLEAR), BUMPON

HEMISPHERE .44X.20 CLEAR

25(4) 3 NA NA NA Sullins Connector Solutions SPC02SYAN, CONN JUMPER

SHORTING GOLD FLASH

(1) Optional

(2) Split into three pins

(3) Install item 24 on bottom at corners.

(4) Install item 25 on item 11 no order - be consistent

8 Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

www.ti.com Bill of Materials

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TPS65270 Buck Converter Evaluation Module User's Guide 9

Changes from Revision B (December 2011) to Revision C (May 2021) Page

• Updated the numbering format for tables, figures, and cross-references throughout the document. ................2

• Updated user's guide title .................................................................................................................................. 2

Revision History www.ti.com

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