Texas Instruments Computer Hardware TPS65020EVM 110 User Manual

User's Guide  
SLVU138August 2005  
TPS65020EVM-110 User's Guide  
This User’s Guide describes the characteristics, operation, and use of the  
TPS65020EVM-110 evaluation module (EVM). This EVM is designed to help the user  
evaluate and test the various operating modes of the TPS65020. This User’s Guide  
includes setup instructions for the hardware and software, a schematic diagram, a bill  
of materials (BOM), and PCB layout drawings for the evaluation module.  
Contents  
1
2
3
4
5
Introduction .......................................................................................... 1  
Setup ................................................................................................. 2  
Board Layout ........................................................................................ 3  
Schematic and Bill of Materials ................................................................... 8  
Related Documentation .......................................................................... 10  
List of Figures  
1
2
3
4
5
6
Assembly Layer..................................................................................... 4  
Top Layer............................................................................................ 5  
Routing, GND Plane................................................................................ 6  
Routing, VIN Plane ................................................................................. 7  
Routing, Bottom Layer ............................................................................. 8  
TPS65020EVM-110 Schematic................................................................... 9  
List of Tables  
1
HPA110A BOM.................................................................................... 10  
1
Introduction  
The Texas Instruments TPS65020EVM is an integrated Power Management IC for applications that are  
powered with one Li-Ion or Li-Polymer cell, and require multiple power rails. The TPS65020 contains three  
highly efficient switching step-down converters, two LDOs, and additional status and I/O pins. The device  
is controlled via an I2C™ interface.  
1.1 Requirements  
In order for this EVM to operate properly, the following components must be connected, and properly  
configured.  
1.2 Personal Computer (PC)  
A computer with a USB port is required to operate this EVM. The TPS65020 interface software, which is  
run on the PC, communicates with the EVM via the PC USB port. The user sends commands to the EVM  
as well as reads the contents of the TPS65020 internal registers through the USB port.  
I2C is a trademark of Philips Electronics.  
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1
 
Board Layout  
INPUT / OUTPUT  
DESCRIPTION  
J11 – GND  
J12 – VDCDC2  
J13 – GND  
Return for VDCDC1  
Output from DCDC2 switching regulator, maximum output current 1 A, default voltage setting 2.5 V.  
Return for VDCDC2  
J14 – VLDO1  
Output from the low drop out regulator VLDO1, maximun current out is 50 mA, default value 1.1 V.  
Return for VLDO1  
J15 – GND  
J16 –VLDO2  
Output from the low drop out regulator, VLDO2 maximum current out is 50 mA, default value 1.3 V.  
Return for VLDO2  
J17 – GND  
J18 – VDCDC3  
J19 – GND  
Output from the switching regulator DCDC3, maximum current is 800 mA, default value 1.55 A  
Return for VDCDC3  
J20 – USB  
USB interface connector  
JP1 – DEF 1  
Sets voltage for DCDC1 to 3 V or 3.3 V.  
JP2 – DEF 2  
Sets voltage for DCDC2 to 2.5 V or 1.8 V.  
JP3 – DEF 3  
Sets voltage for DCDC3 to 1.55 V or 1.3 V.  
JP4 – DCDC1 ON/OFF  
JP5 – DCDC2 ON/OFF  
JP6 – DCDC3 ON/OFF  
JP7 – LDO ON/OFF  
EN for regulator DCDC1, default setting is ON.  
EN for regulator DCDC2, default setting is ON.  
EN for regulator DCDC3, default setting is ON.  
EN for both LDO1 and LDO2 regulators, default setting is ON.  
S1 is a normally open momentary push-button switch that, when pressed, connects VI to GPIO1.  
The GPIO1 input is configured on the TPS65020 as a debounced push button that drives an  
ON/OFF circuit with output at GPIO2.  
S1 – GPIO1  
S2 is a normally open momentary push-button switch that, when pressed, connects the HOT_RST  
input of the TPS65020 to GND generating the Hot_Reset pulse. The HOT_RST pin is externally  
pulled up.  
S2 – HOT_RST  
2.2 Setup  
The following steps must be followed before the EVM is operated  
1. Install the TPS65020EVM Software.  
2. Connect input voltages and loads to the EVM.  
3. Configure all EVM jumpers to factory setting.  
JP4—ON  
JP1—3.3 V  
JP3—1.55 V  
JP2—2.5 V  
JP5—ON  
JP6—ON  
JP7—ON  
4. Connect the Molex cable between the EVM and the EV2300. Note that the Molex cable must connect  
to the I2C connector on the EV2300.  
5. Connect the USB cable between the computer and the EVM.  
6. Turn on all supplies and loads.  
7. Run the TPS65020EVM software.  
3
Board Layout  
This section provides the TPS65020EVM-110 board layout and illustrations.  
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3
 
Board Layout  
3.1 Layout  
Board layout is critical for all switch mode power supplies. Figure 1 through Figure 5 show the board  
layout for the TPS65020EVM-110 PWB. The nodes with high switching frequencies and currents are short  
and are isolated from the noise sensitive feedback circuitry. Careful attention has been given to the routing  
of high frequency current loops. See to the datasheet for specific layout guidelines.  
Figure 1. Assembly Layer  
4
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Board Layout  
Figure 2. Top Layer  
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Board Layout  
Figure 3. Routing, GND Plane  
6
TPS65020EVM-110 User's Guide  
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Board Layout  
Figure 4. Routing, VIN Plane  
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Schematic and Bill of Materials  
Figure 5. Routing, Bottom Layer  
4
Schematic and Bill of Materials  
This section provides the TPS65020EVM-110 schematic and bill of materials.  
8
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Schematic and Bill of Materials  
4.1 Schematic  
Figure 6. TPS65020EVM-110 Schematic  
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9
 
Related Documentation  
4.2 Bill of Material  
Table 1. HPA110A BOM  
Count  
Ref Des  
Value Description  
Size  
Part No.  
MFR  
–001  
–002  
C1, C2,  
C4, C9,  
C10, C11,  
C14, C15,  
C16  
9
4
9
10 µF Capacitor, ceramic, 10 µF, 6.3 V, X5R, 20%  
0805  
0603  
C2012X5R0J106K TDK  
C1608X5R0J225K TDK  
C8, C12,  
C13, C18  
4
2.2 µF Capacitor, ceramic, 2.2 µF, 6.3 V, X5R, 10%  
C3, C6,  
C7, C17  
4
1
1
4
1
1
1.0 µF Capacitor, Ceramic, 1.0 µF, 6.3 V, X5R,10%  
0603  
C1608X5R0J105K TDK  
C1608X7R1H152K TDK  
C5  
D1  
1500 pF Capacitor, Ceramic, 1500 pF, 50 V, X7R, 10%  
0603  
Diode, LED, Red, Gullwing, GW Type, 20 ma,  
1.4 mcd typ  
Red  
0.087 x 0.120  
LN1261CAL  
Panasonic  
Diode, LED, Red, Gullwing, GW Type, 20 ma,  
1.4 mcd typ.  
0
17  
1
0
17  
1
D2  
Open  
0.087 x 0.120  
0.100 x 2  
J1 - J7,  
J10 - J19  
Header, 2-pin, 100 mil spacing, (36-pin strip)  
PTC36SAAN  
22-05-3041  
Sullins  
Molex  
Header, Friction Lock Assembly, 4-pin Right  
Angle  
J20  
0.400 x 0.500  
2
7
0
2
7
2
J8, J9  
Header, 4-pin, 100 mil spacing, (36-pin strip)  
Header, 3-pin, 100 mil spacing, (36-pin strip)  
Header, 2-pin, 100 mil spacing, (36-pin strip)  
0.100 x 4  
0.100 x 3  
0.100 x 2  
PTC36SAAN  
PTC36SAAN  
PTC36SAAN  
Sullins  
Sullins  
Sullins  
JP1 - JP7  
JP8, JP9  
Inductor, SMT, 1.72-A, 59-milliohm  
VLCF4020T-  
2R2N1R7  
2
1
0
2
1
0
L1, L2  
L3  
2.2 µH  
0.157 x 0.157  
0.137 X 0.147  
0603  
TDK  
TDK  
VLF4012AT-  
2R2M1R5  
2.2 µH Inductor, SMT, 1.5-A, 87-milliohm  
R1 - R7,  
R20, R21  
Open  
10  
Resistor, Chip, xx-Ohms, 1/16-W, 1%  
Resistor, Chip, 10-Ohms, 1/16-W, 1%  
1
1
1
2
1
1
1
2
R11  
0603  
0603  
0603  
0603  
Std  
Std  
Std  
Std  
Std  
Std  
Std  
Std  
R12  
1.20M Resistor, Chip, 1.20M-Ohms, 1/16-W, 1%  
R13  
499k  
Resistor, Chip, 499k-Ohms, 1/16-W, 1%  
Resistor, Chip, 4.75k-Ohms, 1/16-W, 1%  
R18, R19  
4.75k  
R22, R23,  
R24  
3
1
3
1
0
Resistor, Chip, 0-Ohms, 1/16-W, 1%  
Resistor, Chip, 1.0k-Ohms, 1/16-W, 1%  
0603  
0603  
Std  
Std  
Std  
Std  
R8  
1.0k  
R9, R10,  
R14, R15,  
R16, R17  
6
6
100k  
100k  
Resistor, Chip, 100k-Ohms, 1/16-W, 1%  
Resistor, Chip, 100k-Ohms, 1/16-W, 1%  
0603  
0603  
Std  
Std  
R25, R26,  
R27  
0
2
1
3
2
0
Std  
Std  
SW1, SW2  
U1  
Switch, SPST, PB Momentary, Sealed Washable 0.245 X 0.251  
KT11P2JM  
TPS65020RHA  
C & K  
TI  
IC, Power Management IC for Li-Ion Powered  
0.242 x 0.242  
Systems  
IC, Power Management IC for Li-Ion Powered  
1
0.242 x 0.242  
Systems  
TPS65021RHA  
TI  
1
7
1
9
PCB, 3.65 In x 2.95 In x 0.062 In  
HPA110  
Any  
3M  
Shunt, 100-mil, Black  
0.100  
929950-00  
5
Related Documentation  
1. TPS65020, Power Management IC for Li-Ion Powered Systems data sheet, SLVS607  
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FCC Warnings  
This equipment is intended for use in a laboratory test environment only. It generates, uses, and  
can radiate radio frequency energy and has not been tested for compliance with the limits of  
computing devices pursuant to subpart J of 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 IMPORTANT NOTICE  
Texas Instruments (TI) provides the enclosed product(s) under the following conditions:  
This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR  
EVALUATION PURPOSES ONLY and is not considered by TI to be fit for commercial use. As  
such, the goods being provided may not be complete in terms of required design-, marketing-,  
and/or manufacturing-related protective considerations, including product safety measures typi-  
cally found in the end product incorporating the goods. As a prototype, this product does not fall  
within the scope of the European Union directive on electromagnetic compatibility and therefore  
may not meet the technical requirements of the directive.  
Should this evaluation kit not meet the specifications indicated in the EVM User's Guide, the 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. Please be  
aware that the products received may not be regulatory compliant or agency certified (FCC, UL,  
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and all appropriate precautions with regard to electrostatic discharge.  
EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY  
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TI currently deals with a variety of customers for products, and therefore our arrangement with the  
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TI assumes no liability for applications assistance, customer product design, software  
performance, or infringement of patents or services described herein.  
Please read the EVM User's Guide and, specifically, the EVM Warnings and Restrictions notice in  
the EVM User's Guide prior to handling the product. This notice contains important safety  
information about temperatures and voltages. For further safety concerns, please contact the TI  
application engineer.  
Persons handling the product must have electronics training and observe good laboratory practice  
standards.  
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.  
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Related Documentation  
EVM WARNINGS AND RESTRICTIONS  
It is important to operate this EVM within the input voltage range of 0 V to 4 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  
100°C. The EVM is designed to operate properly with certain components above 100°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  
Copyright © 2005, Texas Instruments Incorporated  
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