Texas Instruments TPS65251 Manual de usuario

User’s Guide

TPS65251 Buck Converter Evaluation Module User's

Guide

Table of Contents

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

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

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

4 Placement (Top Layer)............................................................................................................................................................6

5 Bench Test Setup Conditions................................................................................................................................................ 7

5.1 Headers Description and Jumper Placement.....................................................................................................................7

5.2 Jumpers..............................................................................................................................................................................8

5.3 Test Points and Placement.................................................................................................................................................8

6 Power-Up Procedure.............................................................................................................................................................. 9

7 Bill of Materials..................................................................................................................................................................... 10

8 Revision History....................................................................................................................................................................11

Trademarks

All trademarks are the property of their respective owners.

www.ti.com Table of Contents

SLVU399B – AUGUST 2010 – REVISED MAY 2021

Submit Document Feedback

TPS65251 Buck Converter Evaluation Module User's Guide 1

1 Introduction

This document presents the information required to power the TPS65251 PMIC as well as the support

documentation including schematic and bill of materials.

Introduction www.ti.com

2TPS65251 Buck Converter Evaluation Module User's Guide SLVU399B – AUGUST 2010 – REVISED MAY 2021

Submit Document Feedback

2 Background

The TPS65251 PMIC is designed to provide 3-A and 2-A continuous outputs with an operational range of 4.5 V

to 18 V and an externally set switching frequency ranging from 300 kHz to 2.2 MHz. When the PMIC is not fully

loaded, Buck1 can be loaded to 3.5 A and Buck2 and Buck3 to 2.5 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

TPS65251EVM VIN = 4.5 V to 13 V

fsw = 500 kHz

Buck1, 1.2 V, 3 A

Buck2, 1.8 V, 2 A

Buck3, 3.3 V, 2 A

(25°C ambient)

This evaluation module is designed to provide access to the features of the TPS65251. 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

SLVU399B – AUGUST 2010 – REVISED MAY 2021

Submit Document Feedback

TPS65251 Buck Converter Evaluation Module User's Guide 3

3 Schematic

See next page.

The resistor and capacitor values have been chosen according to the guidelines presented on the TPS65251

spec available at http://focus.ti.com/docs/prod/folders/print/tps65251.html.

Note that for the purpose of gains-phase measurements R10, R19 and R21 (0 Ω on the EVM) need to be

replaced by suitable low value resistors as per the network analyzer setup required. Test points are provided on

either end of the resistors to allow for easy measurement.

Schematic www.ti.com

4TPS65251 Buck Converter Evaluation Module User's Guide SLVU399B – AUGUST 2010 – REVISED MAY 2021

Submit Document Feedback

10uF

C26

100K

R18

40.2K

4.7nF

C13

GND

47nF C7

GND

VIN

ENB1

80.6K

R12

10uFC9

22uF

C12

GND

4.7nF

GND

4.7nF

20K

GND

383K

GND

100K

47nFC24

47nFC8

GND

VIN

10uFC10

GND

VIN

10uFC17

ENB3

GND

22uF

C16

GND

22uF

C11

4.7uH

TDK-SLF7055

GND

3.3uF

C27

GND

PGOOD

VIN

FB1

40.2K

R11

4.7nF

C18

GND

32.4K

R15

FB2

40.2K

R20

4.7nF

C15

GND

12.7K

R13

FB3

FB2

FB3

FB1

4.7nF

20K

GND

120K

4.7nF

GND

4.7nF

C25

120K

R16

4.7nF

C28

20K

R17

GND

1.8V@2A

3.31V@2A

1.2V@3A

V7V

V3V

4.7nF

GND

4.7nF

GND

4.7nF

C29

GND

1.2V@3A

10uF

C30

GND

JP5 JP6

GND

JP4

GND

JP2

V3V

GND

JP3

V3V

R10

R19

R21

TP14

GND

TP15

GND

TP1

GND

TP2

GND

TP12

VOUT2

TP5

VOUT1

TP10

FB1A

TP16

FB2A

TP8

FB3A

TP4

VOUT3

TP33

V3V

JP1

GND

TP28

TP29

TP27

VOUT1

GND

4.7uH

TDK-SLF7055

4.7uH

TDK-SLF7055

VOUT1

VOUT2

VOUT3

PGOOD

VIN

AGND

GND

DNI

C20

DNI

C14

DNI

C19

VOUT2

VOUT3

RLIM3 1

SS3 2

COMP3 3

FB3 4

SYNC 5

ROSC 6

FB1 7

CMP1 8

SS1 9

RLIM1 10

EN1

BST1

VIN1

LX1

LX2

VIN2

BST2

EN2

RLIM2

SS2

COMP2

FB2

LOW_P (SDA)

GND (SCLK)

PGOOD

V7V

V3V

AGND

GND 31

VIN 32

VIN 33

VIN 34

GND 35

LX3 36

LX3 37

VIN3 38

BST3 39

EN3 40

PwrPad

TPS65251

Pin 25 SDA

and Pin 26

SCLK access

Figure 3-1. TPS65251 Schematic

www.ti.com Schematic

SLVU399B – AUGUST 2010 – REVISED MAY 2021

Submit Document Feedback

TPS65251 Buck Converter Evaluation Module User's Guide 5

4 Placement (Top Layer)

Figure 4-1. Placement (Top Layer)

Placement (Top Layer) www.ti.com

6TPS65251 Buck Converter Evaluation Module User's Guide SLVU399B – AUGUST 2010 – REVISED MAY 2021

Submit Document Feedback

5 Bench Test Setup Conditions

5.1 Headers Description and Jumper Placement

Vin

4.5V – 18V

Vout_1

Vout 2

Vout 3

EN 1

Vout 1

EN 2

Vout 2

EN 3

Vout 3

SCLKLOW PSYNC

Figure 5-1. Headers Description and Jumper Placement

Test points:

Black – GND

White – Each output, feed-back, power good and VIN. All marking on PCB.

www.ti.com Bench Test Setup Conditions

SLVU399B – AUGUST 2010 – REVISED MAY 2021

Submit Document Feedback

TPS65251 Buck Converter Evaluation Module User's Guide 7

5.2 Jumpers

Table 5-1. Jumpers

JUMPER

NO. FUNCTION PLACEMENT COMMENT

JP1 SYNC input For buck internal clock fit jumper.

For external SYNC connect as per drawing.

Jumper must be fitted if no external SYNC

is used

JP2 Buck1 enable (EN1)

For automatic start-up fit jumper to V3V.

For sequencing do not fit jumper.

To disable converter fit jumper to GND.

Fit according to test requirement

JP3 Buck3 enable (EN3)

For automatic start-up fit jumper to V3V.

For sequencing do not fit jumper.

To disable converter fit jumper to GND.

Fit according to test requirement

JP4 Buck2 enable (EN2)

For automatic start-up fit jumper to V3V.

For sequencing do not fit jumper.

To disable converter fit jumper to GND.

Fit according to test requirement

JP5 LOW_P

Low power: Power save mode ON/OFF. If need

low power mode test, should connect V3V internal

regulator test point (TP29).

Fit according to test requirement. During

normal operation jumper must be fitted.

JP6 GND For normal operation fit jumper (GND) Fit according to test requirement. During

normal operation jumper must be fitted.

5.3 Test Points and Placement

Buck converter outputs are red and have a label for easy location. Close to any of these test points there are

black ground test points to allow for DVM measurement or to use a metal exposed scope probe to reduce

common mode noise measurements. All test points are described in Table 5-2.

Table 5-2. Test Points and Placement

TEST

POINT NAME SIGNAL COLOR COMMENT

TP1 GND Ground Black

TP2 GND Ground Black

TP3 AGND Ground Not fitted. Only Via.

TP4 VOUT3 Buck3 output White

TP5 VOUT1 Buck1 output White

TP8 FB3A Input for gain-phase measurement Buck3 White Normally not used

TP10 FB1A Input for gain-phase measurement Buck1 White Normally not used

TP12 VOUT2 Buck2 output White Normally not used

TP14 GND Ground Black

TP15 GND Ground Black

TP16 FB2A Input for gain-phase measurement Buck2 White Normally not used

TP27 PGOOD Power Good (open drain connected to Buck1 output) White

TP28 V7V V7V pin (internal rail) White

TP29 V3V V3V pin (internal rail) White

TP33 VIN Input supply White

Bench Test Setup Conditions www.ti.com

8TPS65251 Buck Converter Evaluation Module User's Guide SLVU399B – AUGUST 2010 – REVISED MAY 2021

Submit Document Feedback

6 Power-Up Procedure

1. Define which converters are to be enabled or disabled by connecting the correct jumpers accordingly

(enable to V3V, disable to GND for all cases).

2. Apply a DC voltage to jumper J3. Polarity is clearly marked on the silk-screen.

3. Verify that the relevant converters are powered up by the output voltages. The whole start-up process will

take around 100 ms. PGOOD will be asserted after 1 s.

4. Apply loads to the output connectors.

5. For low power and SYNC operation remove the jumpers and connect control supplies as indicated in the

bench test setup section.

www.ti.com Power-Up Procedure

SLVU399B – AUGUST 2010 – REVISED MAY 2021

Submit Document Feedback

TPS65251 Buck Converter Evaluation Module User's Guide 9

7 Bill of Materials

Table 7-1. Bill of Materials

ITEM QUANTITY DESIGNATOR VALUE FOOTPRINT MANUFACTURER MANUFACTURER

PART NO. DESCRIPTION COMMENT

1 9

C1, C2, C3,

C4, C5, C6,

C25, C28, C29

4.7 nF 603 Panasonic -ECG ECJ-1VB1H472K 4700PF 50V

X7R 0603 Ceramic capacitor

2 3 C7, C8, C24 47 nF 603 Panasonic -ECG ECJ-1VF1H473Z 47000PF 50V

Y5V 0603 Ceramic capacitor

3 3 C9, C10, C17 10 µF 1206 Panasonic -ECG ECJ-3YB1E106M 10UF 25V X5R

1206 Ceramic capacitor

4 3 C11, C12, C16 22 µF 1210 Panasonic -ECG ECJ-4YB1E226M 22UF 25V X5R

1210 Ceramic capacitor

5 3 C13, C15, C18 470 pF 603 Panasonic -ECG ECJ-1VB2A471K 470PF 100V

X7R 0603 Ceramic capacitor

6 3 C14, C19, C20 DNI 603 Capacitor

7 1 C26 10 µF 805 Panasonic -ECG ECJ-2FB1A106K 10UF 10V X5R

0805 Ceramic capacitor

8 1 C27 3.3 µF 603 TDK C1608X5R1A335K 3.3UF 10V X5R

0603 Ceramic capacitor

9 1 C30 10 µF 1206 Panasonic -ECG ECJ-3YB1E106M 10UF 25V, X5R

1206 Ceramic capacitor

10 1 J1 TB_3X3.5MM OnShoreTechnology Inc ED555/3DS

Terminal,

3 pin, 6 A,

3.5 mm

VOUT1

11 1 J2, J3, J6 TB_2X3.5MM OnShoreTechnology Inc ED555/2DS

Terminal,

2 pin, 6 A,

3.5 mm

TBLK_6A_2X3.5MM

12 3 JP1, JP5, JP6 JMP0.2 Mil-Max 800-10-064-10-0010

SIP HEADER

STRAIGHT

PCB

JUMPER 2 PIN

13 3 JP2, JP3, JP4 JMP0.3 Mil-Max 800-10-064-10-0010

SIP HEADER

STRAIGHT

PCB

JUMPER 2 PIN

14 3 L1, L2, L3 4.7 µH IND_SLF7055 TDK Corporation SLF7055T-4R7N3R

1-3PF

Magnetic-Core

Inductor TDK-SLF7055

15 2 R1, R18 100 kΩ 603 Panasonic -ECG ERA-3AEB104V

RES 100 kΩ

1/10 W .1%

0603 SMD

Resistor

16 3 R3, R5, R17 20 kΩ 603 Panasonic -ECG ERA-3YEB203V

RES 20 kΩ

1/10 W .1%

0603 SMD

Resistor

17 2 R4, R16 150 kΩ 603 Panasonic -ECG ERJ-3EKF1503V

RES 150 kΩ

1/10 W 1%

0603 SMD

Resistor

18 1 R7 383 kΩ 603 Panasonic -ECG ERJ-3EKF3833V

RES 383 kΩ

1/10 W 1%

0603 SMD

Resistor

19 1 R8 DNI 603 Panasonic -ECG ERJ-3GEY0R00V

RES ZERO Ω

1/10 W 5%

0603 SMD

Resistor

20 3 R9, R11, R20 360 kΩ 603 Panasonic -ECG ERJ-3EKF3603V

RES 360 kΩ

1/10 W 1%

0603 SMD

Res1

21 3 R10, R19, R21 49.9 Ω 603 Susumu Co Ltd RR0816Q-49R9-

D-68R

RES 49.9 Ω

1/16 W .5%

0603 SMD

Res1

22 1 R12 715 kΩ 603 Panasonic -ECG ERJ-3EKF7153V

RES 715 kΩ

1/10 W 1%

0603 SMD

Resistor

23 1 R13 115 kΩ 603 Panasonic -ECG ERJ-3EKF1153V

RES 115 kΩ

1/10 W 1%

0603 SMD

Resistor

24 1 R15 287 kΩ 603 Panasonic -ECG ERJ-3EKF2873V

RES 287 kΩ

1/10 W 1%

0603 SMD

Resistor

Bill of Materials www.ti.com

10 TPS65251 Buck Converter Evaluation Module User's Guide SLVU399B – AUGUST 2010 – REVISED MAY 2021

Submit Document Feedback

Tabla de contenidos

Otros manuales de Placa madre de Texas Instruments

Texas Instruments

Texas Instruments TSW14J50 Manual de usuario

Texas Instruments

Texas Instruments DRV3946-Q1EVM Manual de usuario

Texas Instruments

Texas Instruments LMG341xEVM-018 Manual de usuario

Texas Instruments

Texas Instruments DLPC4430EVM Manual de usuario

Texas Instruments

Texas Instruments bq2000EVM Manual de usuario

Texas Instruments

Texas Instruments DRV2605EVM-CT Manual de usuario

Texas Instruments

Texas Instruments TPS60250EVM-185 Manual de usuario

Texas Instruments

Texas Instruments LMK05318B EVM Manual de usuario

Texas Instruments

Texas Instruments OPA462EVM Manual de usuario

Texas Instruments

Texas Instruments TMP108EVM Manual de usuario

Texas Instruments

Texas Instruments TPS62869EVM-118 Manual de usuario

Texas Instruments

Texas Instruments TPS26620-23 Manual de usuario

Texas Instruments

Texas Instruments TPSM8D6C24EVM-2V0 Manual de usuario

Texas Instruments

Texas Instruments LMK04368EPEVM Manual de usuario

Texas Instruments

Texas Instruments ADS1241MEVM Manual de usuario

Texas Instruments

Texas Instruments bq50002AEVM-607 Manual de usuario

Texas Instruments

Texas Instruments LMX1204EVM Manual de usuario

Texas Instruments

Texas Instruments LMK00101 Manual de usuario

Texas Instruments

Texas Instruments ISO5500EVM Manual de usuario

Texas Instruments

Texas Instruments TMAG5123EVM Manual de usuario

Texas Instruments

Texas Instruments AFEDRI8201EVM Manual de usuario

Texas Instruments

Texas Instruments DAC348 Series Manual de usuario

Texas Instruments

Texas Instruments PS62510EVM-168 Manual de usuario

Texas Instruments

Texas Instruments ISO154 EVM Series Manual de usuario

Manuales populares de Placa madre de otras marcas

DFI

DFI SD170 Manual de usuario

ASROCK

ASROCK ROMED8-2T Manual de usuario

Asus

Asus P2L97A Manual de usuario

Winmate

Winmate IC70 Manual de usuario

Asus

Asus MES-B Manual de usuario

Grantech

Grantech SYS8F377VGGA-3OMN Manual de usuario

Telit Wireless Solutions

Telit Wireless Solutions SL869-3DR Manual de usuario

Gigabyte

Gigabyte GA-9IVDT Manual de usuario

Commell

Commell MS-C73 Manual de usuario

IBT Technologies

IBT Technologies MB860 Manual de usuario

Nvidia

Nvidia TEGRA DG-04927-001_V01 Manual de usuario

Biostar

Biostar M7VIT Bravo Instrucciones de funcionamiento e instalación

Intel

Intel D33217CK Manual de usuario

Asus

Asus F1A55-M LX PLUS R2.0 Manual de usuario

EPC

EPC EPC9147C Manual de usuario

Asus

Asus EX-B760M-V5 D4 Manual de usuario

EPOX

EPOX MU-8KHA0010 Manual de usuario

Ski-Doo

Ski-Doo Bombardier MPEM 219 700 090 Manual de usuario