User's Guide
SLVU138–August 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
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
List of Tables
1
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.
SLVU138–August 2005
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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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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
10
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SLVU138–August 2005
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,
CE, etc.). 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 CONSEQUEN-
TIAL 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 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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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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