Texas Instruments TPS65720EVM User manual

User's Guide
SLVU324–March 2010
TPS65720EVM
The TPS65720EVM-515 evaluation module is a fully assembled and tested circuit for evaluating the
TPS65720 two-channel power management integrated circuit..
Contents
1 Introduction .................................................................................................................. 2
1.1 Requirements ....................................................................................................... 2
1.2 1.2 Applications .................................................................................................... 2
1.3 Features ............................................................................................................. 2
2 TPS65720EVM Electrical Performance Specifications ................................................................ 3
3 TPS65720EVM Schematic ................................................................................................ 4
4 Connector and Test Point Descriptions .................................................................................. 5
4.1 Enable Jumpers/Switches ........................................................................................ 5
5 Setup ......................................................................................................................... 7
5.1 Software Setup ..................................................................................................... 7
5.2 Hardware Setup .................................................................................................... 7
5.3 Running the Software ............................................................................................. 7
6 TPS65720EVM Assembly Drawings and Layout ...................................................................... 13
7 Bill of Materials ............................................................................................................. 16
List of Figures
1 TPS65720EVM Schematic ................................................................................................ 4
2 Hardware Board Connection .............................................................................................. 7
3 Starting the Software ....................................................................................................... 8
4 Software Charger View..................................................................................................... 9
5 Software DCDC1/LDO1 View............................................................................................ 10
6 GPIO View.................................................................................................................. 11
7 INTERRUPTS VIEW...................................................................................................... 12
8 TPS65720EVM Component Placement (Viewed From Top)........................................................ 13
9 TPS65720EVM Top Copper (Viewed From Top) ..................................................................... 13
10 TPS65720EVM Bottom Copper (X-Ray View )........................................................................ 14
11 TPS65720EVM Internal 1 (X-Ray View From Top)................................................................... 14
12 TPS65720VM Internal 2 (X-Ray View From Top)..................................................................... 15
List of Tables
1 TPS65720EVM Electrical and Performance Specifications ........................................................... 3
2 HPA515B Bill of Materials................................................................................................ 16
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Introduction www.ti.com
1 Introduction
1.1 Requirements
In order to operate this evaluation module (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 TPS65720EVM, check the TPS65720 product
folder on the TI Web site.
1.1.2 Host Computer
A personal computer (PC) with a USB port is required to operate this EVM. The TPS65720 software runs
on the 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 1.2 Applications
• Bluetooth Headsets
• Handheld Applications
1.3 Features
• Input voltage rating
• Output voltage adjustable via I2C Interface
• Battery charger with power path Management
• 300-mA charge current
• 200-mA step-down converter for TPS65720
• 2.25-MHz Switching Frequency
• 1 General-purpose 200-mA LDO
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www.ti.com TPS65720EVM Electrical Performance Specifications
2 TPS65720EVM Electrical Performance Specifications
Table 1. TPS65720EVM Electrical and Performance Specifications
Parameter Symbol Notes and Conditions Min Typ Max Unit
Input Characteristics
Input Voltage AC VAC 4.35 28 V
Input Voltage DCDC1 VIN_DCDC1 2.1 5.6 V
Input Voltage LDO1 VIN_LDO1 1.8 6.6 V
Bit <AC input current1, AC input current0> = 00 90 95 100
Input Current IAC,max mA
Bit <AC input current1, AC input current0> = 01 or 10 450 475 500
UVLO VUVLO VAC rising 3.2 3.3 3.45 V
UVLO Hysteresis VHYS-UVLO VAC falling 200 300 mV
Output Characteristics
Voltage Range at SYS VSYS 2.2 5.6 V
Output Voltage DCDC1 VDCDC1 VIN = Nom, IOUT = Nom 1.2 V
VIN = 2.3 V to 5.6 V, PFM operation, 1 3 %
0 mA to IOUT, max
Output Voltage Accuracy DCDC1 VIN = 2.3 V to 5.6 V, PWM operation, -2 2 %
0 mA to IOUT, max
Load Regulation PWM operation 0.5 %
Output Current DCDC1 IOUT,DCDC1 VIN = Min to Max 200 mA
Forward Current Limit High-side ILIMF VIN = 2.3 V to 5.6 V 425 600 775 mA
and Low-side MOSFET
Dropout Voltage LDO1 VIN,LDO = 2.05 V, IOUT = 200 mA 180 mA
Default Output Voltage LDO1 VLDO1 VIN = Nom, IOUT = Nom 1.85 V
Output Voltage Accuracy LDO1 -1.5 2.5 %
Output Current of LDO1 200 mA
Line Regulation LDO1 -1 1 %
Load Regulation LDO1 VIN = Nom, VOUT = VOUT2-5% -1 2 %
Systems Characteristics
Switching Frequency FSW 2030 2250 2480 kHz
Peak Efficiency hpk VIN =Nom 92 %
Full Load Efficiency hVIN = 3.6, VOUT = 2.05, IOUT = 400 mA 89 %
MIPSA25202R2
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TPS65720EVM Schematic www.ti.com
3 TPS65720EVM Schematic
For Reference Only, See Table 2 for specific values.
Figure 1. TPS65720EVM Schematic
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www.ti.com Connector and Test Point Descriptions
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 positive connection to pin 1 of J3, 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 – VIN_LDO1 / 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 J6
pin1 (VINLDO) and pin2 (GND). Note that the resistors R4 and R5 must be removed when supplying the
LDO1 from an external power supply.
4.1.7 J7 – VDCDC1
This header is the positive output of 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).
4.1.8 J8 – GND
J8 is the return connection of VDCDC1 output rail. A load can be connected between J8 and J7
(VDCDC1).
4.1.9 J9 – VLDO
This header is the positive output of 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 www.ti.com
4.1.11 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.
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 pushbutton 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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TPS65720EVM-515
Host Computer
USB to GPIO Interface
DC Power Supply
J1 J2
J13
J3
Lithium Ion
Battery
TS +
-
+-
www.ti.com Setup
5 Setup
5.1 Software Setup
To download the software, go the TPS65720 product folder on the TI Web site (www.ti.com).
Download the software, and execute it to install the software.
5.2 Hardware Setup
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 the software is started, a dialog box appears (see Figure 3) and asks the user to select whether a
TPS65720 or TPS65721 is connected.
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Setup www.ti.com
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, users can enable/disable the charger and 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 User Registers are displayed.
See the TPS65720 data sheet for detailed description on these registers.
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www.ti.com Setup
Figure 4. Software Charger View
The DCDC1/LDO1 control window (see Figure 5) allows control of 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 TPS65720 data sheet for detailed description on these registers.
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Figure 5. Software 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 be 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 TPS65720 data sheet for detailed description on these registers.
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www.ti.com Setup
Figure 6. GPIO View
The INTERRUPT control window allows the user to configure and mask interrupts.
In the default setup, 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 TPS65720 data sheet for detailed description on these registers.
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Setup www.ti.com
Figure 7. INTERRUPTS VIEW
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T
I
EXAS
NSTRUMENTS
www.ti.com TPS65720EVM Assembly Drawings and Layout
6 TPS65720EVM Assembly Drawings and Layout
The following figures (Figure 8 through Figure 12) show the design of the TPS65720EVM printed-circuit
board.
Figure 8. TPS65720EVM Component Placement (Viewed From Top)
Figure 9. TPS65720EVM Top Copper (Viewed From Top)
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TPS65720EVM Assembly Drawings and Layout www.ti.com
Figure 10. TPS65720EVM Bottom Copper (X-Ray View )
Figure 11. TPS65720EVM Internal 1 (X-Ray View From Top)
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www.ti.com TPS65720EVM Assembly Drawings and Layout
Figure 12. TPS65720VM Internal 2 (X-Ray View From Top)
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Bill of Materials www.ti.com
7 Bill of Materials
Table 2. HPA515B Bill of Materials
Count RefDes Value Description Size Part Number MFR
0 C1 open Capacitor, Ceramic, 35V, X5R, 10% 0603 GMK107BJ105K Taiyo Yuden
1 C10 2.2µF Capacitor, Ceramic, 6.3V, X5R, 10% 0805 GRM155R60J22ME15D Murata
1 C11 22µF Capacitor, Ceramic, 50V, COG, 5% 0603 GRM1885C1H220JA01D Murata
1 C2 1µF Capacitor, Ceramic, 35V, X5R, 10% 0603 GMK107BJ105K Taiyo Yuden
1 C3 1µF Capacitor, Ceramic, 6.3V, X5R, 10% 0603 JMK107BJ105KK-T Taiyo Yuden
1 C4 open Capacitor, Ceramic, 6.3V, X5R, 10% 0603 GRM188R60J475K Murata
2 C5, C8 4.7µF Capacitor, Ceramic, 6.3V, X5R, 10% 0603 GRM188R60J475K Murata
1 C6 10µF Capacitor, Ceramic, 6.3V, X5R, 20% 0603 GRM188R60J106ME47D Murata
0 C7 open Capacitor, Ceramic, 6.3V, X5R, 20% 0805 GRM188R60J106ME47D Murata
0 C9 open Capacitor, Ceramic, 6.3V, X7R, 10% 0805 GRM188R60J225KE19D Murata
1 D1 LTL29S Diode LED, red, 60 mW, 15mA 0603 LT L29S-N2Q1-25 Osram
1 D2 LSL29 Diode LED, green. 40 mW, 20mA 0603 LS L29K-G1H2-1 Osram
9 J1- J10 PTC36SAAN Header, Male 2-pin, 100mil spacing 0.100 inch x 2 PEC02SAAN Sullins
1 J12 PTC36SAAN Header, Male 6-pin, 100mil spacing 0.100 inch x 6 PEC06SAAN Sullins
1 J13 PTC36DAAN Connector, Male straight 2c5 pin, 100mil 0.100 inch x 5 2510-6002RB 3M
spacing, 4 wall X 2
2 J3, J11 PTC36SAAN Header, 3-pin, 100mil spacing 0.100 inch x 3 PEC03SAAN Sullins
2 JP1, JP2 PEC03SAAN Header, 2-pin, 100mil spacing 0.100 inch x 2 PEC02SAAN Sullins
2 JP3, JP4 PEC03SAAN Header, 3-pin, 100mil spacing 0.100 inch x 3 PEC03SAAN Sullins
1 L1 2.2µH Inductor, Power, xx A, yy milliohms 2.5 × 2.0 mm MIPSA2520D1R0 FDK
0 R1, R5, R13, open Resistor, Chip, 1/16W, 1% 0603 std std
R14, R20, R21
1 R10 open Resistor, Chip, 1/16W, 5% 0603 std std
2 R17, R18 3.3k Resistor, Chip, 1/16W, 5% 0603 std std
1 R2 10k Resistor, Chip, 1/16W, 1% 0603 std std
1 R3 1k Resistor, Chip, 1/16W, 1% 0603 std std
2 R4, R19 0 Resistor, Chip, 1/16W, 1% 0603 std std
5 R6, R11, R12, 100k Resistor, Chip, 1/16W, 1% 0603 std std
R15, R16
2 R7, R8 330k Resistor, Chip, 1/16W, 1% 0603 std std
1 R9 0 Resistor, Chip, 1/16W, 5% 0603 std std
1 S1 KT11P2JM Switch, SPST, PB Momentary, Sealed Tactile 0.245 X 0.251 KT11P2JM34LFS C & K
inch
1 U1 TPS65720YFF IC, PMU for Bluetooth Headsets DSBGA-25 TPS65720YFF TI
1 -- PCB, 2 In x 2 In x 0.062 In HPA515 Any
3 -- Shunt, 100-mil, Black 0.100 929950-00 3M
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.
Using unclean flux is unacceptable.
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.
5 Maximum 30 grams placement pressure on DSBGA-25 parts.
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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
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Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30
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TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive.
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Please read the User’s Guide and, specifically, the Warnings and Restrictions notice in the User’s Guide prior to handling the
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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
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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 .
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.
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