User's Guide
SLVU339 – February 2010
TPS65721EVM
This user's guide provides an overview of the TPS65721EVM evaluation module, a description of the
connector and test points, and setup instructions. Also included are the EVM schematic, board art, and bill
of materials.
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2
3
4
5
6
7
Contents
Introduction .................................................................................................................. 2
1.1
Requirements ....................................................................................................... 2
1.2
Applications ......................................................................................................... 2
1.3
Features ............................................................................................................. 2
TPS65721EVM Electrical Performance Specifications ................................................................ 3
TPS65721EVM Schematic ................................................................................................ 4
Connector and Test Point Descriptions .................................................................................. 5
4.1
Enable Jumpers/Switches ........................................................................................ 5
Setup ......................................................................................................................... 7
5.1
Software Setup ..................................................................................................... 7
5.2
Hardware Setup .................................................................................................... 7
5.3
Running the Software ............................................................................................. 7
TPS65721EVM Assembly Drawings and Layout ...................................................................... 13
Bill of Materials ............................................................................................................. 16
List of Figures
1
2
3
4
5
6
7
8
9
10
................................................................................................
Hardware Board Connection ..............................................................................................
Starting the Software .......................................................................................................
Software Charger View .....................................................................................................
DCDC1/LDO1 View .......................................................................................................
GPIO View..................................................................................................................
Interrupts View .............................................................................................................
TPS65721EVM Component Placement (Viewed From Top) ........................................................
TPS65721EVM Top Copper (Viewed From Top) .....................................................................
TPS65721EVM Bottom Copper (X-Ray View ) ........................................................................
TPS65721EVM Schematic
4
7
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13
14
15
List of Tables
1
TPS65721EVM Electrical and Performance Specifications ........................................................... 3
2
HPA516B Bill of Materials ................................................................................................ 16
Windows is a trademark of Microsoft Corporation.
I2C is a trademark of Philips Semiconductor.
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1
Introduction
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Introduction
The TPS65721EVM-516 evaluation module (EVM) is a fully assembled and tested circuit for evaluating
the TPS65721 2-Channel Power Management integrated circuit (IC).
1.1
Requirements
In order to operate this EVM, the following components must be connected and properly configured. All
components and connectors are supplied in the EVM except for the host computer and the DC power
supply. Software must be downloaded from the TI Web site at www.ti.com.
1.1.1
Software
To download the software that is necessary to operate the TPS65721EVM, check the TPS65721 product
folder on the TI Web site (www.ti.com) .
1.1.2
Host Computer
A computer with a USB port is required to operate this EVM. The TPS65721 software runs on a personal
computer (PC) and communicates with the EVM via the PC's USB port and the USB-to-GPIO interface.
PC Requirements :
• Windows™ 2000 or XP operating system
• USB port
• Minimum of 30 MB of free hard disk space (100 MB recommended)
• Minimum of 256 MB of RAM
1.1.3
Power Supply Requirements
A DC power supply capable of delivering 5 V at 1 A is required to operate this EVM.
1.2
Applications
•
•
1.3
Features
•
•
•
•
•
•
•
2
Bluetooth headsets
Handheld applications
Input voltage rating
Output voltage adjustable via I2C™ Interface
Battery charger with power path management
300-mA charge current
400-mA step-down converter for TPS65721
2.25-MHz switching frequency
1 General-purpose 200-mA LDO
TPS65721EVM
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TPS65721EVM Electrical Performance Specifications
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2
TPS65721EVM Electrical Performance Specifications
Table 1. TPS65721EVM Electrical and Performance Specifications
Symbol
Parameter
Notes and Conditions
Min
Typ
Max
Unit
Input Characteristics
VAC
Input Voltage AC
4.35
28
V
VIN_DCDC1
Input Voltage DCDC1
2.1
5.6
V
VIN_LDO1
Input Voltage LDO1
1.8
6.6
V
IAC,max
Input Current
100
mA
VUVLO
UVLO
VHYS
UVLO Hysteresis
-UVLO
Bit = 00
90
95
Bit = 01 or 10
450
475
500
VAC rising
3.2
3.3
3.45
V
VAC falling
200
300
mV
5.6
V
Output Characteristics
VSYS
Voltage range at SYS
VDCDC1
Output Voltage DCDC1
VIN = Nom, IOUT = Nom
2.2
1.2
Output Voltage Accuracy DCDC1
VIN = 2.3V to 5.6V , PFM operation , 0mA to IOUT,max
1%
Load Regulation
PWM operation
IOUT,DCDC1
Output Current DCDC1
VIN = MIN to MAX
ILIMF
Forward Current Limit high- and
low-side MOSFET
VIN = 2.3 V to 5.6 V
Dropout Voltage LDO1
VIN,LDO = 2.05 V, IOUT = 200 mA
Output Voltage LDO1
VIN = Nom, IOUT = Nom, (including 1% resistor tolerance),
as configured on the EVM
–2%
VLDO1
Output Voltage Accuracy LDO1
V
2%
2%
0.5%
625
850
400
mA
1150
mA
120
1.73
1.8
–1.5
%
mV
1.88
V
2.5%
Output Current of LDO1
200
Line Regulation LDO1
–1%
1%
Load Regulation LDO1
–1%
2%
mA
Systems Characteristics
FSW
Switching Frequency
hpk
Peak Efficiency
VIN = Nom
2030
h
Full Load Efficiency
VIN =3.6, VOUT =1.8, IOUT = 400mV, MIPSA25202R2
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2250
2480
85%
TPS65721EVM
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kHz
95%
3
TPS65721EVM Schematic
3
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TPS65721EVM Schematic
For Reference Only, See Table 2 for Specific Values
Figure 1. TPS65721EVM Schematic
4
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Connector and Test Point Descriptions
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4
Connector and Test Point Descriptions
4.1
Enable Jumpers/Switches
4.1.1
J1 – VIN
This header is the positive connection to the input power supply. The power supply must be connected
between J1 and J2 (GND). The leads to the input supply must be twisted and kept as short as possible.
The input voltage has to be between 4.35 V and 6 V.
4.1.2
J2 – GND
This header is the return connection to the input power supply. Connect the power supply between J2 and
J1 (VIN). The leads to the input supply must be twisted and kept as short as possible. The input voltage
has to be between 4.35 V and 6 V.
4.1.3
J3 – BAT/GND/TS
Connect your battery's positive connection to pin 1 of J3 and negative connection to pin 2 of J3. The
battery thermistor can be connected to pin 3 of J3. if an external thermistor is used, R2 must be removed.
4.1.4
J4 – SYS
This header is the positive output of the power path.
4.1.5
J5 – GND
This header is the negative output of the power path.
4.1.6
J6 – VDCDC1
This header is the positive output of the VDCDC1 step-down converter. The output voltage of DCDC1 can
be adjusted to any voltage between 0.6 V and VINDCDC1 with the external voltage divider R7 and R8.
The default setting is 1.2 V. VDCDC1 is capable of sourcing up to 200 mA. A load can be connected
between J7 and J8 (GND).
4.1.7
J7 – GND
J8 is the return connection of VDCDC1 output rail. A load can be connected between J8 and J7
(VDCDC1).
4.1.8
J8 – VINLDO/GND
This header is the input supply for the LDO1 on the EVM. VINLDO1 is directly connected to SYS with R4.
It also can be connected to VDCDC1 with R5.
An external power supply can be connected between J8 pin 1 (VINLDO) and pin 2 (GND). Note that the
resistors R4 and R5 must be removed when supplying the LDO1 from an external power supply.
4.1.9
J9 – VLDO
This header is the positive output of the LDO1 linear regulator. The default output voltage of LDO1 is 1.85
V. VLDO1 can be adjusted via I2C interface in the range between.
LDO1 is capable of sourcing up to 300 mA. A load can be connected between J9 and J10 (GND).
4.1.10
J10 – GND
J10 is the return connection of LDO1 output rail. A load can be connected between J10 and J9
(VDCDC1).
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Connector and Test Point Descriptions
4.1.11
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J11 – INT/ RESET/GND
J11 pin 1 is connected to the open-drain output INT. J11 pin 2 is connected to the open-drain output
RESET. All open-drain outputs are pulled up with a resistor to the pullup voltage PULLUP. Pullup is
connected to VLDO1 with R10 on the EVM. PULLUP also can be connected to VIN and VDCDC1 with the
resistors R20 and R21. J13 pin 3 is connected to GND.
4.1.12
J12 – SYS/GPIO0/GPIO1/GPIO2/GPIO3/SYS
Four GPIOs are available on this header.
• J12 pin 1 is connected to the SYS voltage.
• J12 pin 2 is connected to GPIO0.
• J12 pin 3 is connected to GPIO1.
• J12 pin 4 is connected to GPIO2.
• J12 pin 5 is connected to GPIO3.
4.1.13
J13
J13 is the interface connector for the I2C interface. Connect a 10-pin ribbon cable between J13 and the
USB-to-GPIO interface.
4.1.14
JP1
JP1 connects the cathode of the LED D2 to GPIO2. If GPIO2 is configured as a current sink, JP1 can be
removed to measure the current through the LED with an ammeter.
If GPIO2 is configured as an input or output, JP1 must be removed to disconnect the LED D2.
4.1.15
JP2
JP2 connects the cathode of the LED D1 to GPIO3. If GPIO3 is configured as a current sink, JP2 can be
removed to measure the current through the LED with an ammeter.
If GPIO3 is configured as an input or output, JP2 must be removed to disconnect the LED D1.
4.1.16
JP3 – HOLD_DCDC1
Connect a shorting jumper between HOLD_DCDC1 and SYS to enable DCDC1. Note that if a power
supply is connected to AC, DCDC1 is enabled independent of the status of HOLD_DCDC1.
If the IC is supplied from BAT, DCDC1 is enabled when PB_IN is pulled low. To keep DCDC1 enabled,
HOLD_DCDC1 must be pulled high before PB_IN is released high.
4.1.17
JP4 – HOLD_LDO1
Connect a shorting jumper between HOLD_LDO1 and SYS to enable LDO1. Note that if a power supply is
connected to AC LDO is enabled independent of the status of HOLD_LDO1.
If the IC is supplied from BAT, LDO is enabled when PB_IN is pulled low. To keep LDO1 enabled,
HOLD_LDO11 must be pulled high before PB_IN is released high.
4.1.18
S1 – PB_IN
This is the Push-Button Input. Pressing S1 pulls PB_IN to GND and therefore enables DCDC1 and LDO1.
To keep DCDC1/LDO1 enabled, the individual HOLD pins must be pulled high before PB_IN is released
high.
If a power supply is present at AC, both DCDC1 and LDO1 are enabled independent of the HOLD pins.
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Setup
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5
Setup
5.1
Software Setup
To download the software, go the TPS65721 product folder on the TI Web site (www.ti.com). Download
the software, and execute it to install the software.
5.2
Hardware Setup
Host Computer
USB to GPIO Interface
TS
TPS65721EVM-516
+
J3
J13
Lithium Ion
Battery
J1
+
J2
-
DC Power Supply
Figure 2. Hardware Board Connection
5.3
Running the Software
Click on the TPS65720_1EVM icon to start the software. If no icon appears on the host computer, then
use the start button in the lower left corner of the screen to browse the program folders to find the
software. The default directory for software installation is Program Files\Texas
Instruments\TPS65720_1EVM.
Once started, the software dialog box appears (see Figure 3), and asks to select whether a TPS65720 or
TPS65721 is connected.
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Setup
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Figure 3. Starting the Software
Once the used device is selected, the software starts up (see Figure 4).
By clicking on the Tabs CHARGER , DCDC1/LDO1, GPIO, and INTERRUPTS, the user can navigate
through the different Views .
The window that first appears allows control of all charger settings and shows all the charger status flags.
In the CHARGER tab, the user can enable/disable the charger, change charger parameters as regulated
output voltage on the Power Path (VSYS), charge voltage, safety timers, etc.
In the lower right corner of the window, all charger-related Charger Registers are displayed.
See the TPS65721 data sheet for detailed description on these registers.
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Figure 4. Software Charger View
The DCDC1/LDO1 control window (see Figure 5) allows control of the operating mode (PWM/PFM) for the
DC/DC converter, output voltage of LDO1 (TPS65720 only), and shows the status flags related to DCDC1
and LDO1.
In the lower right corner of the window, all DCDC1/LDO1-related User Registers are displayed.
See the TPS65721 data sheet for a detailed description on these registers.
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Setup
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Figure 5. DCDC1/LDO1 View
The GPIO control window (see Figure 6) allows control of the fours GPIOs of the TPS65720/1. The GPIOs
can be configured as input or output. In addition GPIO2 and GPIO3 can configured as current sink to drive
an external LED.
In the lower right corner of the window, all GPIO-related User Registers are displayed.
See the TPS65721 data sheet for the detailed description on these registers.
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Figure 6. GPIO View
The INTERRUPT control window allows the user to configure and mask interrupts. The default setup is
that all interrupts are masked. If an event is masked, it is ignored and no interrupt is generated. If an event
is not masked, an interrupt is generated based on that event. If any interrupt is pending, the INT pin is
driven low.
In the lower right corner of the window, all INTERRUPT-related User Registers are displayed.
See the TPS65721 data sheet for a detailed description on these registers.
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Figure 7. Interrupts View
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TPS65721EVM Assembly Drawings and Layout
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TPS65721EVM Assembly Drawings and Layout
The following figures (Figure 8 through Figure 10) show the design of the TPS65721EVM printed-circuit
board.
Figure 8. TPS65721EVM Component Placement (Viewed From Top)
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TPS65721EVM Assembly Drawings and Layout
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TEXAS
INSTRUMENTS
TPS65721EVM-516
HPA516 Rev. B
Figure 9. TPS65721EVM Top Copper (Viewed From Top)
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TPS65721EVM Assembly Drawings and Layout
Figure 10. TPS65721EVM Bottom Copper (X-Ray View )
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Bill of Materials
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Bill of Materials
Table 2. HPA516B Bill of Materials
Count
RefDes
Value
Description
Size
0
C1
open
Capacitor, Ceramic, 35V, X5R, 10%
0603
Part Number
MFR
0
C10
open
Capacitor, Ceramic, 6.3V, X5R, 10%
0805
1
C11
2.2uF
Capacitor, Ceramic, 6.3V, X5R, 10%
2
C12, C13
22pF
Capacitor, Ceramic, 50V, COG, 5%
0603
GRM155R60J22ME15D
Murata
0603
GRM1885C1H220JA01D
1
C2
1uF
Murata
Capacitor, Ceramic, 35V, X5R, 10%
0603
GMK107BJ105K
1
C3
Taiyo Yuden
1uF
Capacitor, Ceramic, 6.3V, X5R, 10%
0603
JMK107BJ105KK-T
0
Taiyo Yuden
C4
open
Capacitor, Ceramic, 10V, X7R, 10%
0603
0
C5
open
2
C6, C9
4.7uF
Capacitor, Ceramic, 6.3V, X5R, 10%
0603
GRM188R60J475K
Murata
1
C7
10uF
Capacitor, Ceramic, 6.3V, X5R, 20%
0603
GRM188R60J106ME47D
Murata
1
C8
open
Capacitor, Ceramic, 6.3V, X5R, 20%
0805
LMK212BJ475_G
Murata
1
D1
LTL29S
Diode LED, green, 60 mW, 15mA
0603
LT L29S-N2Q1-25
Osram
1
D2
LSL29K
Diode LED, red. 40 mW, 20mA
0603
LS L29K-G1H2-1
Osram
1
L1
2.2uH
Inductor, Power, 1.1 A, 110 milliohms
2.5 × 2.0 mm
MIPSA2520D1R0
FDK
0
R1, R5, R14,
open
R17, R18, R25,
R26
Resistor, Chip, 1/16W, 1%
0603
std
std
1
R10
150k
Resistor, Chip, 1/16W, 1%
0603
std
std
1
R11
0
Resistor, Chip, 1/16W, 5%
0603
std
std
1
R12
open
Resistor, Chip, 1/16W, 5%
0603
std
std
1
R2
10k
Resistor, Chip, 1/16W, 1%
0603
std
std
2
R21, R22
3.3k
Resistor, Chip, 1/16W, 5%
0603
std
std
1
R3
1k
Resistor, Chip, 1/16W, 1%
0603
std
std
2
R4, R24
0
Resistor, Chip, 1/16W, 1%
0603
std
std
2
R6, R7
330k
Resistor, Chip, 1/16W, 1%
0603
std
std
7
R8, R13, R15,
100k
R16, R19, R20,
R23
Resistor, Chip, 1/16W, 1%
0603
std
std
1
R9
200k
Resistor, Chip, 1/16W, 1%
0603
std
std
1
U1
TPS65721RSN
IC, PMU for Bluetooth Headsets
QFN-32
TPS65721RSM
TI
1
--
HPA516
Any
0805
PCB, 2.2 In x 2.7 In x 0.062 In
Notes 1. These assemblies are ESD sensitive, ESD precautions shall be observed.
2. These assemblies must be clean and free from flux and all contaminants.
Use of no clean flux is not acceptable.
3. These assemblies must comply with workmanship standards IPC-A-610 Class 2.
4. Ref designators marked with an asterisk ('**') cannot be substituted.
All other components can be substituted with equivalent MFG's components.
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Evaluation Board/Kit Important Notice
Texas Instruments (TI) provides the enclosed product(s) under the following conditions:
This evaluation board/kit 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. Persons handling the
product(s) must have electronics training and observe good engineering practice standards. As such, the goods being provided are
not intended to be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations,
including product safety and environmental measures typically found in end products that incorporate such semiconductor
components or circuit boards. This evaluation board/kit does not fall within the scope of the European Union directives regarding
electromagnetic compatibility, restricted substances (RoHS), recycling (WEEE), FCC, CE or UL, and therefore may not meet the
technical requirements of these directives or other related directives.
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 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.
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. Due to the open construction of the product, it is the user’s responsibility to
take any and all appropriate precautions with regard to electrostatic discharge.
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.
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.
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 contact the TI application engineer or visit www.ti.com/esh.
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.
FCC Warning
This evaluation board/kit 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 rules, which are designed to provide reasonable protection against radio frequency interference. Operation of this
equipment in other environments 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.
EVM Warnings and Restrictions
It is important to operate this EVM within the input voltage range of 4.35 V to 28 V and the output voltage range of 0.6 V to 5.6 V
for dc/dc converter and 0.8 V to 3.3 V for LDO.
Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are
questions concerning the input range, please contact a TI field representative prior to connecting the input power.
Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the
EVM. Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load
specification, please contact a TI field representative.
During normal operation, some circuit components may have case temperatures greater than 60° C. The EVM is designed to
operate properly with certain components above 60° C as long as the input and output ranges are maintained. These components
include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of
devices can be identified using the EVM schematic located in the EVM User's Guide. When placing measurement probes near
these devices during operation, please be aware that these devices may be very warm to the touch.
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
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Following are URLs where you can obtain information on other Texas Instruments products and application solutions:
Products
Applications
Amplifiers
amplifier.ti.com
Audio
www.ti.com/audio
Data Converters
dataconverter.ti.com
Automotive
www.ti.com/automotive
DLP® Products
www.dlp.com
Communications and
Telecom
www.ti.com/communications
DSP
dsp.ti.com
Computers and
Peripherals
www.ti.com/computers
Clocks and Timers
www.ti.com/clocks
Consumer Electronics
www.ti.com/consumer-apps
Interface
interface.ti.com
Energy
www.ti.com/energy
Logic
logic.ti.com
Industrial
www.ti.com/industrial
Power Mgmt
power.ti.com
Medical
www.ti.com/medical
Microcontrollers
microcontroller.ti.com
Security
www.ti.com/security
RFID
www.ti-rfid.com
Space, Avionics &
Defense
www.ti.com/space-avionics-defense
RF/IF and ZigBee® Solutions www.ti.com/lprf
Video and Imaging
www.ti.com/video
Wireless
www.ti.com/wireless-apps
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