Texas Instruments TPS62866 User manual

User’s Guide
TPS62866EVM-051 Evaluation Module
ABSTRACT
The TPS62866EVM-051 facilitates the evaluation of the TPS62866 6-A, step-down converter with DCS-Control™
in a tiny 1.05-mm by 1.78-mm WCSP package with 0.35-mm pitch. The EVM outputs a 0.9-V output voltage with
1% accuracy from input voltages between 2.4 V and 5.5 V. The TPS62866 is a highly efficient and tiny solution
for point-of-load (POL) converters for space-constrained applications, such as artificial intelligence chips, camera
modules, solid state drives (SSDs), and optical modules.
Table of Contents
1 Introduction.............................................................................................................................................................................2
2 Setup........................................................................................................................................................................................2
3 TPS62866EVM-051 Test Results............................................................................................................................................3
4 Board Layout...........................................................................................................................................................................3
5 Schematic and List of Materials............................................................................................................................................ 5
6 Software User Interface..........................................................................................................................................................6
7 Revision History......................................................................................................................................................................9
List of Figures
Figure 4-1. Top Assembly............................................................................................................................................................ 3
Figure 4-2. Top Layer...................................................................................................................................................................3
Figure 4-3. Signal Layer 1........................................................................................................................................................... 3
Figure 4-4. Signal Layer 2........................................................................................................................................................... 3
Figure 4-5. Signal Layer 3........................................................................................................................................................... 4
Figure 4-6. Signal Layer 4........................................................................................................................................................... 4
Figure 4-7. Bottom Layer............................................................................................................................................................. 4
Figure 4-8. TPS62866EVM-051 Angled View..............................................................................................................................4
Figure 4-9. TPS62866EVM-051 Overhead View.........................................................................................................................4
Figure 5-1. TPS62866EVM-051 Schematic.................................................................................................................................5
Figure 6-1. Quick Connection Overview...................................................................................................................................... 6
Figure 6-2. GUI Home Screen..................................................................................................................................................... 7
Figure 6-3. GUI Settings Screen..................................................................................................................................................8
Figure 6-4. GUI Register Map Screen......................................................................................................................................... 9
List of Tables
Table 1-1. Performance Specification Summary..........................................................................................................................2
Table 5-1. TPS62866EVM-051 List of Materials..........................................................................................................................5
www.ti.com Table of Contents
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1 Introduction
The TPS62866 is a synchronous, step-down converter in a 1.05- x 1.78- x 0.5-mm wafer chip-scale package
(WCSP).
1.1 Performance Specification
Table 1-1 provides a summary of the TPS62866EVM-051 performance specifications.
Table 1-1. Performance Specification Summary
SPECIFICATION TEST CONDITIONS MIN TYP MAX UNIT
Input voltage 2.4 5 5.5 V
Output voltage setpoint 0.9 V
Output current 0 6000 mA
1.2 Modifications
The EVM can support variance of the whole IC family. Additional input and output capacitors can be added.
2 Setup
This section describes how to properly use the TPS62866EVM-051.
2.1 Input/Output Connector Descriptions
J1, Pin 1 and 2 – VIN Positive input connection from the input supply for the EVM
J1, Pin 3 and 4 – S+/S- Input voltage sense connections. Measure the input voltage at this point.
J1, Pin 5 and 6 – GND Input return connection from the input supply for the EVM
J2, Pin 1 and 2 – VOUT Output voltage connection
J2, Pin 3 and 4 – S+/S- Output voltage sense connections. Measure the output voltage at this point.
J2, Pin 5 and 6 – GND Output return connection
J3, Pin 5 – VBUS The VBUS pin of this header is used to bias the SCL and SDA nodes of I²C interface
via a resistor.
J3, Pin 6 – GND The GND pin of this header is used to connect the grounds of the IC and the I²C
interface.
J3, Pin 9 – SCL The pin of this header should be connected to the SCL of the I²C interface.
J3, Pin 10 – SDA The pin of this header should be connected to the SDA of the I²C interface.
JP1 – VID/PG VID/ PG pin jumper. Always place the jumper across VID/ PG and LOW pins before
start-up. This sets the output voltage and device address. After startup, VOUT reflects
the value set on VOUT Register 1 if the jumper is placed across VID/ PG and LOW
pins. VOUT follows the value set on VOUT Register 2 if the jumper is placed across
VID/ PG and HIGH pins.
JP2 – EN EN pin input jumper. Place the jumper across ON and EN to turn on the IC. Place the
jumper across OFF and EN to turn off the IC.
2.2 Setup
To operate the EVM, set jumpers JP1 and JP2 to the desired position per Section 2.1. Connect the input supply
to J1 and connect the load to J2.
Introduction www.ti.com
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3 TPS62866EVM-051 Test Results
The TPS62866EVM-051 was used to take all the data in the TPS62866 data sheet (SLVSEI1). See the device
data sheet for the performance of this EVM.
4 Board Layout
This section provides the TPS62866EVM-051 board layout and illustrations in Figure 4-1 through Figure 4-7.
The Gerbers are available on the EVM product page: TPS62866EVM-051
Figure 4-1. Top Assembly Figure 4-2. Top Layer
Figure 4-3. Signal Layer 1 Figure 4-4. Signal Layer 2
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Figure 4-5. Signal Layer 3 Figure 4-6. Signal Layer 4
Figure 4-7. Bottom Layer
Figure 4-8. TPS62866EVM-051 Angled View Figure 4-9. TPS62866EVM-051 Overhead View
Board Layout www.ti.com
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5 Schematic and List of Materials
This section provides the TPS62866EVM-051 schematic and list of materials.
5.1 Schematic
Figure 5-1 illustrates the EVM schematic.
1
2
J4
GND
VOUT VOUT VIN SW
VIN
S+S+
5
4
1
2
3
6
J1
5
4
1
2
3
6
J2
S-S-
GND GND
EN
68uF
C8
TPS628660AYCGR
VOS A3
VSET/VID A2
AGND A1
GND B1
GND B2
GND B3
SW C1
SW C2
SW C3
VIN
D1
VIN
D2
VIN
D3
SCL
E3
SDA
E2
EN
E1
U1
VID/PG
SDA
SCL
GND GNDGND GNDGND
GND
USB2ANY comunication interface connector
VIN
VBUS
1 2
3 4
5 6
7 8
9 10
J3
GND
ON VIN
VID/PG
GND
VBUS
EN EN
OFF
GND
86.6k
R1
2.00k
R3
2.00k
R4
SCL SDA
I2C interface communication with USB2ANY:
VBUS is not required to be connected
USB2ANY interface has an internal 3.3V VBUS supply
22µF
C2
22µF
C3
22µF
C4
22µF
C7
1
2
3
JP2
1
2
3
JP1 100k
R2
220nH
L1
10µF
C1
10µF
C5
10µF
C6
2.4V to 5.5V 0.4V to 1.675V
Figure 5-1. TPS62866EVM-051 Schematic
5.2 List of Materials
Table 5-1 lists a list of materials for this EVM.
Table 5-1. TPS62866EVM-051 List of Materials
DESIGNATOR QTY DESCRIPTION PART NUMBER MANUFACTURER
C1, C5 2 Capacitor, ceramic, 10 µF, 6.3 V, ±20%, X7R, 0603 CL10B106MQ8NRNC Samsung Electro-Mechanics
C2, C3 2 Capacitor, ceramic, 22 µF, 6.3 V, ±20%, X7R, 0805 GRM21BZ70J226ME44L Murata
C8 1 Capacitor, tantalum, 68 µF, 20 V, ±10%, 7343 T495D686K020ATE150 Kemet
L1 1 Inductor, 220 nH, 16.8 A, 5.8 mΩ, SMD, 4040 XAL4020-221MEB Coilcraft
R1 1 Resistor, 86.6 kΩ, 1%, 0.1 W, 0603 Std Std
R2 1 Resistor, 100 kΩ, 1%, 0.1 W, 0603 Std Std
R3, R4 2 Resistor, 2.0 kΩ, 1%, 0.1 W, 0603 Std Std
U1 1 6-A Step-Down Converter with I²C Interface and Wide
Output Voltage Range, YCG0015ACAC (DSBGA-15)
TPS628660AYCGT Texas Instruments
www.ti.com Schematic and List of Materials
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6 Software User Interface
6.1 Software Setup
A graphical user interface (GUI) is available from the TPS62866 design and development page, which allows
simple and convenient programming of the device through the TI USB2ANY (https://www.ti.com/tool/USB2ANY)
interface board. Alternatively, you can use any I2C-standardized programming tool or I2C host to configure the
device. Mind the I2C pins specification, such as timing parameters and proper pullup resistors, specified in the
TPS62864/6 2.4-V to 5.5-V Input, 4-A and 6-A Synchronous Step-Down Converter with I2C Interface in WCSP
Package Data Sheet.
6.2 Interface Hardware Setup
Connect the USB2ANY adapter to the PC using the supplied USB cable. Attach the EVM connector, J3 to
the USB2ANY adapter using the supplied 10-pin ribbon cable. The ribbon cable connector is keyed to prevent
incorrect installation.
Figure 6-1 shows a quick adapter connection overview.
Host
Computer
USB Cable
USB
Interface
Adapter
Green LED
Indicates
Power
10-Pin
Ribbon
Cable
EVM Board
USB Interface Adaptor Quick Connection Diagram
Figure 6-1. Quick Connection Overview
Software User Interface www.ti.com
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6.3 User Interface Operation
Upon start-up, the GUI automatically connects to the EVM. If not, then click on the "Connect" button in the
lower-left corner of the GUI window. Ensure the I2C Slave Address is correct. The following sections give a short
overview of the three main GUI screens.
6.3.1 Home Screen
The Home screen provides a short overview of the TPS6286x0 devices. To start evaluating the device, click the
Start button. Click the I2C Slave Address button to change the address, and the default I2C address is 0x40.
All the links related to the device are all indicated on the bottom portion of the window.
Figure 6-2. GUI Home Screen
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6.3.2 Settings Screen
The Settings screen provides control over the VOUT and CONTROL Registers. The Status Register is available
in this window as well. Real-time updates are possible if the Auto Read function is set to As fast as possible in
the Register Map page.
Figure 6-3. GUI Settings Screen
Software User Interface www.ti.com
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6.3.3 Register Map Screen
The Register Map screen shows bit values of all parameters. In this section, single registers can be read or
written to the device (if applicable). Refer to the register map in the TPS62864/6 2.4-V to 5.5-V Input, 4-A
and 6-A Synchronous Step-Down Converter with I2C Interface in WCSP Package Data Sheet for a detailed
description of the TPS62866 registers.
Figure 6-4. GUI Register Map Screen
7 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision * (July 2019) to Revision A (July 2021) Page
• Updated the numbering format for tables, figures, and cross-references throughout the document..................1
• Added Software User Interface section.............................................................................................................. 6
www.ti.com Software User Interface
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STANDARD TERMS FOR EVALUATION MODULES
1. Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, and/or
documentation which may be provided together or separately (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance
with the terms set forth herein. User's acceptance of the EVM is expressly subject to the following terms.
1.1 EVMs are intended solely for product or software developers for use in a research and development setting to facilitate feasibility
evaluation, experimentation, or scientific analysis of TI semiconductors products. EVMs have no direct function and are not
finished products. EVMs shall not be directly or indirectly assembled as a part or subassembly in any finished product. For
clarification, any software or software tools provided with the EVM (“Software”) shall not be subject to the terms and conditions
set forth herein but rather shall be subject to the applicable terms that accompany such Software
1.2 EVMs are not intended for consumer or household use. EVMs may not be sold, sublicensed, leased, rented, loaned, assigned,
or otherwise distributed for commercial purposes by Users, in whole or in part, or used in any finished product or production
system.
2Limited Warranty and Related Remedies/Disclaimers:
2.1 These terms do not apply to Software. The warranty, if any, for Software is covered in the applicable Software License
Agreement.
2.2 TI warrants that the TI EVM will conform to TI's published specifications for ninety (90) days after the date TI delivers such EVM
to User. Notwithstanding the foregoing, TI shall not be liable for a nonconforming EVM if (a) the nonconformity was caused by
neglect, misuse or mistreatment by an entity other than TI, including improper installation or testing, or for any EVMs that have
been altered or modified in any way by an entity 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 in the EVMs within ten (10)
business days after delivery, or of any hidden defects with ten (10) business days after the defect has been detected.
2.3 TI's sole liability shall be at its option to repair or replace EVMs that fail to conform to the warranty set forth above, or credit
User's account for such EVM. TI's liability under this warranty shall be limited to EVMs that are returned during the warranty
period to the address designated by TI and that are determined by TI not to conform to such warranty. If TI elects to repair or
replace such EVM, TI shall have a reasonable time to repair such EVM or provide replacements. Repaired EVMs shall be
warranted for the remainder of the original warranty period. Replaced EVMs shall be warranted for a new full ninety (90) day
warranty period.
WARNING
Evaluation Kits are intended solely for use by technically qualified,
professional electronics experts who are familiar with the dangers
and application risks associated with handling electrical mechanical
components, systems, and subsystems.
User shall operate the Evaluation Kit within TI’s recommended
guidelines and any applicable legal or environmental requirements
as well as reasonable and customary safeguards. Failure to set up
and/or operate the Evaluation Kit within TI’s recommended
guidelines may result in personal injury or death or property
damage. Proper set up entails following TI’s instructions for
electrical ratings of interface circuits such as input, output and
electrical loads.
NOTE:
EXPOSURE TO ELECTROSTATIC DISCHARGE (ESD) MAY CAUSE DEGREDATION OR FAILURE OF THE EVALUATION
KIT; TI RECOMMENDS STORAGE OF THE EVALUATION KIT IN A PROTECTIVE ESD BAG.