Texas Instruments TPS61196EVM-600 Manuale utente

User's Guide

SLVUA25 –January 2014–Revised February 2014

TPS61196EVM-600 User's Guide

This user’s guide contains background information for the TPS61196 as well as setup and operation

instructions for the TPS61196EVM-600 evaluation module (EVM). Also included are test results, printed-

circuit board (PCB) layouts, schematics, and the bill of materials (BOM) for the EVM.

Contents

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

1.1 Performance Specification Summary ............................................................................ 2

2 Jumper and Connector Setup ............................................................................................. 2

2.1 Input/Output Connector Description ............................................................................. 2

2.2 Setup ................................................................................................................ 3

3 Operation ..................................................................................................................... 4

3.1 Non-Dimming Operation (Default Configuration) .............................................................. 4

3.2 PWM-Dimming Operation ......................................................................................... 4

3.3 Test Results ........................................................................................................ 4

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

5 Schematics ................................................................................................................... 7

6 Bill of Materials .............................................................................................................. 8

7 Related Documentation From Texas Instruments ...................................................................... 8

List of Figures

1 Default Jumper Configuration ............................................................................................. 3

2 Efficiency Versus Dimming Cycle, 20 LEDs............................................................................. 4

3 Efficiency Versus Dimming Cycle, 16 LEDs............................................................................. 5

4 Top Assembly Layer........................................................................................................ 5

5 Top Layer Routing .......................................................................................................... 6

6 Bottom Layer Routing ...................................................................................................... 6

7 TPS61196EVM-600 Schematic........................................................................................... 7

List of Tables

1 Device and Package Configurations ..................................................................................... 2

2 Typical Performance Specification Summary ........................................................................... 2

3 TPS61196EVM-600 Bill of Materials ..................................................................................... 8

SLVUA25 –January 2014–Revised February 2014 TPS61196EVM-600 User's Guide

Introduction

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1 Introduction

TI's TPS61196EVM-600 evaluation module contains the TPS61196 integrated circuit (IC), a six-channel,

400-mA WLED driver. The TPS61196 provides a highly-integrated solution for LCD TV backlight with an

independent PWM dimming function for each channel. This EVM helps designers evaluate the operation

and performance of the TPS61196. The EVM contains one DC/DC converter as shown in Table 1.

Table 1. Device and Package Configurations

CONVERTER IC PACKAGE

U1 TPS61196 HTSSOP

1.1 Performance Specification Summary

The EVM is designed to operate from an input voltage source ranging from 10 V–30 V, and provides a

continuous 200-mA output current for each string. The OVP voltage is set to 60 V but can be adjusted for

the specific application.

Table 2 provides a summary of the TPS61196EVM-600 performance specifications. All specifications are

given for an ambient temperature of 25°C.

Table 2. Typical Performance Specification Summary

CONDITION MIN TYP MAX UNITS

VIN supply 10 30 V

IOUT 787 mA

2 Jumper and Connector Setup

This section describes the jumpers and connectors on the EVM as well and how to properly connect, set

up and use the TPS61196EVM-600.

2.1 Input/Output Connector Description

J1 – Input: This header is the power input terminals for the converter. The terminal block provides a

power (VIN) and ground (GND) connection to allow the user to attach the EVM to a cable harness.

J3 – 8-pin Connector: This header provides connections to the boost converter output (VOUT) and the six

current feedback lines (IFBx). With a 8-pin ribbon cable, this header can be connected to six LED strings,

to facilitate evaluation.

J4 – FAULT: This header is a fault indicator to indicate abnormal conditions. When the TPS61196 is

operating normally, the voltage at the FAULT pin is low. When a fault condition happens, it is in high

impedance, which can be pulled to high level through an external resistor.

J5 – PWM Combination: This header provides flexible PWM control, PWM1–PWM6 can be controlled

together by one PWM signal or can be controlled by six independent PWM signals.

J6 – GND: This header connects to GND.

JP1, JP3 to JP7 – IFB1 to IFB6: These jumpers are used to enable IFBx channels. Shorting pin 1 and

pin 2 enables the IFBx channel and shorting pin 2 and pin 3 disables the corresponding channel.

JP2 – EN: This jumper is used to enable the device. Connecting pin1 and pin2 will toggle the EN high and

enable the device. Connecting pin2 and pin3 will toggle the EN low and disable the device.

JP8 – PWM: This jumper is used to send a high or low signal to the J5 jumper. Connecting pin1 and pin2

will send a high signal to J5. Connecting pin2 and pin3 will send a low signal to J5.

2TPS61196EVM-600 User's Guide SLVUA25 –January 2014–Revised February 2014

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Jumper and Connector Setup

2.2 Setup

This EVM requires an external power supply capable of providing 10 V to 30 V at 5 A. To change the

default current value (that is, implement dimming), the user can apply either a PWM signal to JP8-pin2

and connect PWM1–PWM6 together, or apply six independent PWM signals to PWM1–PWM6.

The hardware connections of TPS61196EVM-600:

• The DC power supply is connected between J1-pin1 and J1-pin2.

• The LED array is connected to the J3.

• The one single PWM dimming signal can be connected to JP8-pin2, six independent PWM dimming

signals can be connected to J5-pin 2, 4, 6, 8, 10, 12.

The range of dimming frequency is 90 Hz to 22 kHz. The output overvoltage protection is set to 60 V,

which can be adjusted by R7 in SCH, then can drive different series number of LEDs. To ensure the

TPS61196EVM-600 operates properly, the minimum output voltage of the board should be more than

input power voltage. This requires selection of the LED array carefully to make sure the total forward

voltage of the series LEDs is more than the input voltage.

Figure 1 shows the default configuration of the jumpers.

Figure 1. Default Jumper Configuration

SLVUA25 –January 2014–Revised February 2014 TPS61196EVM-600 User's Guide

Operation

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3 Operation

This section contains non-dimming and PWM-dimming operation instructions, and EVM test results.

3.1 Non-Dimming Operation (Default Configuration)

For non-dimming operation of the TPS61196EVM-600; J5, JP2, and JP8 should be properly configured as

shown in Figure 1. The configuration for JP1 and JP3 to JP7 is determined by the specific application. In

this default configuration, the device will power up when power is applied.

3.2 PWM-Dimming Operation

Remove the jumper on JP8 of the default configuration, connect the appropriately configured function

generator output between JP8-pin2 and JP8-pin3 (for GND connection) to control PWM1–PWM6 together,

or connect six independent PWM signals between J5-pin2, 4, 6, 8, 10, 12 and GND to control

PWM1–PWM6. The PWM signal's duty cycle is directly proportional to the regulated current.

3.3 Test Results

Figure 2 and Figure 3 provide typical efficiency for the TPS61196EVM-600 board.

Figure 2. Efficiency Versus Dimming Cycle, 20 LEDs

4TPS61196EVM-600 User's Guide SLVUA25 –January 2014–Revised February 2014

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Board Layout

Figure 3. Efficiency Versus Dimming Cycle, 16 LEDs

4 Board Layout

Figure 4,Figure 5, and Figure 6 show the board layout for the TPS61196EVM-600. The EVM offers

resistors, capacitors and jumpers. Jumpers are provided to configure the device.

Figure 4. Top Assembly Layer

SLVUA25 –January 2014–Revised February 2014 TPS61196EVM-600 User's Guide

Board Layout

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Figure 5. Top Layer Routing

Figure 6. Bottom Layer Routing

6TPS61196EVM-600 User's Guide SLVUA25 –January 2014–Revised February 2014

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Schematics

5 Schematics

Figure 7 illustrates the schematic for this EVM.

Figure 7. TPS61196EVM-600 Schematic

SLVUA25 –January 2014–Revised February 2014 TPS61196EVM-600 User's Guide

Bill of Materials

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6 Bill of Materials

Table 3 contains the BOM for the TPS61196EVM-600.

Table 3. TPS61196EVM-600 Bill of Materials

RefDes Qty Value Package PN

C1 1 470uF 10x20 35ZL470MEFC10X20

C2 1 100uF 10x23 100ZL100MEFC10X23

C4 1 1uF 1206 C3216X7R2A105M

C5, C6 2 1uF 1206 C3216X7R1H105K

C7 1 470pF 0402 C1005C0G1H471J

C8, C14 2 1000pF 0402 C1005C0G1E102J

C9 1 2.2uF 0603 C0603C225K8PACTU

C12 1 100pF 0402 GRM1555C1H101JA01D

C11 1 0.33uF(1) 0402 GRM155C80J334KE01D

C13 1 0.047uF 0402 GRM155R60J473KA01D

C15 1 0.1uF 0402 C1005X5R0J104K

D1 1 SS5P10-M3/86A TO-277 SS5P10-M3

H1, H2, H5, H6 4 Standoff 1902C

H3, H4, H7, H8 4 Screw NY PMS 440 0025 PH

J1 1 7.0x8.2x6.5mm ED555/2DS

J3 1 8x1 Header TSW-108-07-G-S

J4 1 Header, 2 PIN, 100mil, Tin PEC02SAAN

J5 1 6x2 Header TSW-106-07-G-D

J6 1 4x1 Header TSW-104-07-G-S

JP1, JP2, JP3, JP4, JP5, JP6, JP7, JP8 8 Header, 3 PIN, 100mil, Tin PEC03SAAN

L1 1 68uH 0.675 x 0.675 inch IHLP6767GZER680M1

LBL1 1 PCB Label 0.650"H x 0.200"W THT-14-423-10

Q1 1 100V DPAK SUD40N10-25-E3

R1, R4, R10, R13 4 100k 0402 CRCW0402100KJNED

R2, R30 2 249k 0402 CRCW0402249KFKED

R3 1 49.9 0402 CRCW040249R9FKED

R5 1 200 0402 CRCW0402200RFKED

R6 1 0.1 2512 CRA2512-FZ-R100ELF

R7 1 191k 0402 CRCW0402191KFKED

R8 1 73.2k 0402 CRCW040273K2FKED

R9, R15, R21, R25, R27, R29 6 27k 0402 CRCW040227K0JNED

R11, R14, R28 3 10k 0402 CRCW040210K0JNED

R12 1 200k 0402 CRCW0402200KFKED

R16, R17, R18, R19, R20, R22 6 10Meg 0402 CRCW040210M0JNED

R23 1 60.4k 0402 CRCW040260K4FKED

R24 1 196k 0402 CRCW0402196KFKED

R26 1 37.4k 0402 CRCW040237K4FKED

R31 1 3.0 1206 CRCW12063R00JNEA

SH-JP1, SH-JP2, SH-JP3, SH-JP4, SH-JP5, SH-JP6, 14 1x2 Shunt 969102-0000-DA

SH-JP7, SH-JP8, SH-JP9, SH-JP10, SH-JP11, SH-JP12,

SH-JP13, SH-JP14

TP1, TP2, TP3 3 Red Keystone5010 5010

U1 1 PWP0028D TPS61196PWP

PCB 1 PWR600

FID1, FID2, FID3 0 Fiducial N/A

C3 0 100uF 10x23mm 100ZL100MEFC10X23

C10 0 100pF 0402 GRM1555C1H101JA01D

(1) Please change this value to 1 µF–4.7 µF in the application.

7 Related Documentation From Texas Instruments

See the TPS61196 datasheet (SLVSBG1C) for more information.

8TPS61196EVM-600 User's Guide SLVUA25 –January 2014–Revised February 2014

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Revision History

Changes from Original (January 2014) to A Revision .................................................................................................... Page

• Changed schematic image. ............................................................................................................. 7

• Added note to BOM on row that begins with C11. ................................................................................... 8

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

SLVUA25 –January 2014–Revised February 2014 Revision History

EVALUATION BOARD/KIT/MODULE (EVM) ADDITIONAL TERMS

Texas Instruments (TI) provides the enclosed Evaluation Board/Kit/Module (EVM) under the following conditions:

The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims

arising from the handling or use of the goods.

Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30 days from

the date of delivery for a full refund. THE FOREGOING LIMITED WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO

BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF

MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH

ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL

DAMAGES.

Please read the User's Guide and, specifically, the Warnings and Restrictions notice in the User's Guide prior to handling the product. This

notice contains important safety information about temperatures and voltages. For additional information on TI's environmental and/or safety

programs, please visit www.ti.com/esh or contact TI.

No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or

combination in which such TI products or services might be or are used. TI currently deals with a variety of customers for products, and

therefore our arrangement with the user is not exclusive. TI assumes no liability for applications assistance, customer product design,

software performance, or infringement of patents or services described herein.

REGULATORY COMPLIANCE INFORMATION

As noted in the EVM User’s Guide and/or EVM itself, this EVM and/or accompanying hardware may or may not be subject to the Federal

Communications Commission (FCC) and Industry Canada (IC) rules.

For EVMs not subject to the above rules, this evaluation board/kit/module is intended for use for ENGINEERING DEVELOPMENT,

DEMONSTRATION OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end product fit for general consumer

use. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing

devices pursuant to part 15 of FCC or ICES-003 rules, which are designed to provide reasonable protection against radio frequency

interference. Operation of the equipment may cause interference with radio communications, in which case the user at his own expense will

be required to take whatever measures may be required to correct this interference.

General Statement for EVMs including a radio

User Power/Frequency Use Obligations: This radio is intended for development/professional use only in legally allocated frequency and

power limits. Any use of radio frequencies and/or power availability of this EVM and its development application(s) must comply with local

laws governing radio spectrum allocation and power limits for this evaluation module. It is the user’s sole responsibility to only operate this

radio in legally acceptable frequency space and within legally mandated power limitations. Any exceptions to this are strictly prohibited and

unauthorized by Texas Instruments unless user has obtained appropriate experimental/development licenses from local regulatory

authorities, which is responsibility of user including its acceptable authorization.

For EVMs annotated as FCC – FEDERAL COMMUNICATIONS COMMISSION Part 15 Compliant

Caution

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause

harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the

equipment.

FCC Interference Statement for Class A EVM devices

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules.

These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial

environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the

instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to

cause harmful interference in which case the user will be required to correct the interference at his own expense.

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