User's Guide
SLVU208B–April 2007–Revised December 2012
TPS60250EVM-185
Contents
1 Introduction .................................................................................................................. 1
2 Setup ......................................................................................................................... 2
3 Board Layout ................................................................................................................ 6
4 Schematic and Bill of Materials ........................................................................................... 9
List of Figures
1 TPS60250 Software Screenshot.......................................................................................... 5
2 Assembly Layer ............................................................................................................. 6
3 Top Layer Routing .......................................................................................................... 7
4 Bottom Layer Routing ...................................................................................................... 8
5 TPS60250EVM-185 Schematic........................................................................................... 9
List of Tables
1 Factory EVM Jumper Settings ............................................................................................ 4
2 TPS60250EVM-185 Bill of Materials.................................................................................... 10
1 Introduction
The Texas Instruments TPS60250EVM-185 evaluation module (EVM) helps designers evaluate the
operation and performance of the TPS60250 white LED (WLED) driver for applications that are powered
with one Li-ion or Li-polymer cell and require two or three separate banks of WLEDs. The TPS60250
contains a 1×/1.5× chargepump, as well as seven current sinks that are configured into a main display
bank of four or five WLEDs and a sub-display bank of two WLEDs. Additionally, the fifth main display
WLED can be configured to drive an aux display at up to 80 mA for backlighting a keypad or a weak
camera flash.
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Setup
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2 Setup
This chapter describes the jumpers and connectors on the EVM, as well as how to properly connect, set
up, and use the TPS60250EVM-185.
2.1 Input/Output Connector Descriptions
J1 – VIN
This is the positive input voltage connection to the converter. The EVM operates from any supply voltage
between 3 V and 6 V. The leads to the input supply should be twisted and kept as short as possible to
minimize EMI transmission and input voltage droop.
J2 – GND
This is the input return connection for the input power supply.
J3 – USB to GPIO Connector
This is the connector for the interface box. Connect a ribbon cable of the interface box to this device.
J4 – VLED CATHODE DM5
This is the DM5 connection for using an external aux display WLED bank. Connect the cathode(s) of the
external aux display bank to this input.
J5 – VLED ANODE DM5
This is the anode connection for using an external aux display WLED bank. Connect the anode(s) of the
external aux display bank to this output.
JP1 – DM1
JP1 is used to connect the cathode of the DM1 LED to the DM1 pin on the TPS60250. Place a shunt on
JP1 to connect the WLED to the DM1 input. Remove the shunt to measure the DM1 current or use an
external WLED for DM1.
JP2 – DM2
JP2 is used to connect the cathode of the DM2 LED to the DM2 pin on the TPS60250. Place a shunt on
JP2 to connect the WLED to the DM2 input. Remove the shunt to measure the DM2 current or use an
external WLED for DM2.
JP3 – DM3
JP3 is used to connect the cathode of the DM3 LED to the DM3 pin on the TPS60250. Place a shunt on
JP3 to connect the WLED to the DM3 input. Remove the shunt to measure the DM3 current or use an
external WLED for DM3.
JP4 – DM4
JP4 is used to connect the cathode of the DM4 LED to the DM4 pin on the TPS60250. Place a shunt on
JP4 to connect the WLED to the DM4 input. Remove the shunt to measure the DM4 current or use an
external WLED for DM4.
JP5 – DM5
JP5 is used to connect the cathode of the DM5 LED to the DM5 pin on the TPS60250. Place a shunt on
JP5 to connect the WLED to the DM5 input. Remove the shunt to measure the DM5 current or use an
external WLED for DM5.
JP6 – DS1
JP6 is used to connect the cathode of the DS1 LED to the DS1 pin on the TPS60250. Place a shunt on
JP6 to connect the WLED to the DS1 input. Remove the shunt to measure the DS1 current or use an
external WLED for DS1.
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Setup
JP7 – DS2
JP7 is used to connect the cathode of the DS2 LED to the DS2 pin on the TPS60250. Place a shunt on
JP7 to connect the WLED to the DS2 input. Remove the shunt to measure the DS2 current or use an
external WLED for DS2.
2.2 Equipment Requirements
In order for this EVM to operate properly, the following components must be connected and properly
configured.
2.2.1 Personal Computer
A computer with a USB port is required to operate this EVM. The TPS60250 interface software, which is
run on the personal computer (PC), communicates with the EVM via the PC USB port. The user sends
commands to the EVM and reads the contents of the TPS60250 internal registers through the USB port.
2.2.2 Printed Circuit Board Assembly
The TPS60250EVM-185 PCB contains the TPS60250 IC and its required external components. This
board contains several jumpers and connectors that allow the user to customize the board for specific
operating conditions.
2.2.3 USB to I2C Adapter
The HPA172 is the link that allows the PC and the EVM to communicate. The adapter connects to the PC
with the supplied USB cable on one side and to the EVM though the supplied ribbon cable on the other.
When the user writes a command to the EVM, the interface program, which is run from the PC, sends the
command to the PC USB port. The adapter receives the USB command and converts the signal to an I2C
protocol. It then sends the I2C signal to the TPS60250 board. When the user reads a status register from
the EVM, the PC sends a command to read a register on the EVM. When the EVM receives the
command, it reports the status of the register via the I2C interface. The adapter receives the information on
the I2C interface, converts it to a USB protocol, and sends it to the PC.
2.2.4 Software
Texas Instruments provides software to assist the user in evaluating this EVM. Check the TPS60250EVM-
185 product folder (http://www.ti.com/tool/tps60250evm-185) on the TI Web site for the latest version of
the software.
2.2.5 Power Supplies
The TPS60250 EVM requires one power supply for operation. It may need to supply several hundred mA,
depending on the WLED currents.
2.3 Operation
The following steps must be followed before the EVM can be operated.
1. Install the TPS6025xEVM software.
2. Connect the input voltages to the EVM.
3. Configure all EVM jumpers to the factory settings in Table 1.
4. Connect the ribbon cable between the EVM and the USB-TO-GPIO (HPA172) adapter.
5. Connect the USB cable between the computer and USB-TO-GPIO adapter
6. Run the TPS6025xEVM software.
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Setup
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Table 1. Factory EVM Jumper Settings
Jumper Shunt Location
JP1 Installed
JP2 Installed
JP3 Installed
JP4 Installed
JP5 Installed
JP6 Installed
JP7 Installed
2.3.1 TPS6025x Software Operation
The software is designed to work with the entire TPS60250/1/2 family of devices. A screenshot of the
software is shown in Figure 1. Upon being opened, the software asks the user to select which particular
EVM is installed.
The top part of the software contains a link to the device datasheet as well as buttons to read and write all
the registers.
The bottom part of the software indicates that the USB-to-GPIO adaptor is installed and working properly.
It also notes the I2C bus speed (100 kHz).
2.3.1.1 Left Half of Software GUI - Settings
This portion of the software allows the user to enable/disable the different banks of LEDs using simple
check boxes. Open lamp detection may be enabled/disabled using the provided check box. Refer to the
TPS60250 data sheet for a description of the open lamp detection. Additionally, a pulldown box (MODE) is
available to control the aux display settings. The aux display may be grouped with main display or set for
the separate high-current (80 mA) aux display. When using the high-current setting, it is suggested that
separate LEDs are connected between the J5 (cathode connection) and J6 (anode connection)
connectors. The LEDs installed on the EVM are rated for 30-mA dc current and may be damaged at the
higher current. Selecting the shutdown option in the Aux Display pulldown menu disables all of the LEDs
and places the IC in a low-power shutdown mode. The internal registers are not changed in this mode.
Another MODE pulldown box allows selection of what switching mode is used to drive the WLEDs: auto
switch, forced 1x, or forced 1.5x. Finally, there are 3 pulldown boxes at the bottom to set the WLED
current for each of the banks.
2.3.1.2 Right Half of the GUI - Register Map
This portion of the software allows the user to change the registers on a bit level. All this functionality is
already included in the easy to use boxes and pulldowns on the left half side of the GUI.
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Board Layout
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3 Board Layout
This chapter provides the TPS60250EVM-185 board layout and illustrations.
3.1 Layout
Board layout is critical for all switch mode power supplies. Figure 2 through Figure 4 show the board
layout for the TPS60250EVM-185 PCB.
Figure 2. Assembly Layer
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Schematic and Bill of Materials
4 Schematic and Bill of Materials
This chapter provides the TPS60250EVM-185 schematic and bill of materials.
4.1 Schematic
Figure 5. TPS60250EVM-185 Schematic
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Schematic and Bill of Materials
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4.2 Bill of Materials
Table 2. TPS60250EVM-185 Bill of Materials
Count RefDes Value Description Size Part Number MFR
1 C1 1.0uF Capacitor, Ceramic, 25V, X5R, 10% 0603 GRM188R61E105KA12 muRata
2 C2, C3 2.2uF Capacitor, Ceramic, 10V, X5R, 10% 0603 GRM188R61A225KE34 muRata
1 C4 4.7uF Capacitor, Ceramic, 10V, X5R, 10% 0805 GRM21BR61A475KA73 muRata
DM1 - DM5,
7 Diode. LED, White 0.079 × 0.118 NSSW100CT Nichia
DS1, DS2
2 R1, R2 10.0k Resistor, Chip, 1/16W, 1% 0603 Std Std
0 R3, R4 Open Resistor, Chip, 1/16W, 1% 0603
IC, High Efficiency Charge Pump for
1 U1 QFN-16 TPS60250RTE TI
7 WLEDS with I2C Interface
Related Documentation From Texas Instruments
TPS60250 data sheet (SLVS769)
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EVALUATION BOARD/KIT/MODULE (EVM) ADDITIONAL TERMS
Texas Instruments (TI) provides the enclosed Evaluation Board/Kit/Module (EVM) under the following conditions:
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.
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 LIMITED 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. 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.
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 visit www.ti.com/esh or contact TI.
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. 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.
REGULATORY COMPLIANCE INFORMATION
As noted in the EVM User’s Guide and/or EVM itself, this EVM and/or accompanying hardware may or may not be subject to the Federal
Communications Commission (FCC) and Industry Canada (IC) rules.
For EVMs not subject to the above rules, this evaluation board/kit/module 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 or ICES-003 rules, which are designed to provide reasonable protection against radio frequency
interference. Operation of the equipment 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.
General Statement for EVMs including a radio
User Power/Frequency Use Obligations: This radio is intended for development/professional use only in legally allocated frequency and
power limits. Any use of radio frequencies and/or power availability of this EVM and its development application(s) must comply with local
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unauthorized by Texas Instruments unless user has obtained appropriate experimental/development licenses from local regulatory
authorities, which is responsibility of user including its acceptable authorization.
For EVMs annotated as FCC – FEDERAL COMMUNICATIONS COMMISSION Part 15 Compliant
Caution
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause
harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the
equipment.
FCC Interference Statement for Class A EVM devices
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to
cause harmful interference in which case the user will be required to correct the interference at his own expense.
FCC Interference Statement for Class B EVM devices
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment
generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
For EVMs annotated as IC – INDUSTRY CANADA Compliant
This Class A or B digital apparatus complies with Canadian ICES-003.
Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the
equipment.
Concerning EVMs including radio transmitters
This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this
device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired
operation of the device.
Concerning EVMs including detachable antennas
Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser) gain
approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain should
be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for successful communication.
This radio transmitter has been approved by Industry Canada to operate with the antenna types listed in the user guide with the maximum
permissible gain and required antenna impedance for each antenna type indicated. Antenna types not included in this list, having a gain
greater than the maximum gain indicated for that type, are strictly prohibited for use with this device.
Cet appareil numérique de la classe A ou B est conforme à la norme NMB-003 du Canada.
Les changements ou les modifications pas expressément approuvés par la partie responsable de la conformité ont pu vider l’autorité de
l'utilisateur pour actionner l'équipement.
Concernant les EVMs avec appareils radio
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est
autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout
brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.
Concernant les EVMs avec antennes détachables
Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain
maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à
l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que la puissance isotrope rayonnée équivalente
(p.i.r.e.) ne dépasse pas l'intensité nécessaire à l'établissement d'une communication satisfaisante.
Le présent émetteur radio a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne énumérés dans le manuel
d’usage et ayant un gain admissible maximal et l'impédance requise pour chaque type d'antenne. Les types d'antenne non inclus dans
cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont strictement interdits pour l'exploitation de l'émetteur.
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【【Important Notice for Users of this Product in Japan】】
This development kit is NOT certified as Confirming to Technical Regulations of Radio Law of Japan
If you use this product in Japan, you are required by Radio Law of Japan to follow the instructions below with respect to this product:
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EVALUATION BOARD/KIT/MODULE (EVM)
WARNINGS, RESTRICTIONS AND DISCLAIMERS
For Feasibility Evaluation Only, in Laboratory/Development Environments. Unless otherwise indicated, this EVM is not a finished
electrical equipment and not intended for consumer use. It is intended solely for use for preliminary feasibility evaluation in
laboratory/development environments by technically qualified electronics experts who are familiar with the dangers and application risks
associated with handling electrical mechanical components, systems and subsystems. It should not be used as all or part of a finished end
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Your Sole Responsibility and Risk. You acknowledge, represent and agree that:
1. You have unique knowledge concerning Federal, State and local regulatory requirements (including but not limited to Food and Drug
Administration regulations, if applicable) which relate to your products and which relate to your use (and/or that of your employees,
affiliates, contractors or designees) of the EVM for evaluation, testing and other purposes.
2. You have full and exclusive responsibility to assure the safety and compliance of your products with all such laws and other applicable
regulatory requirements, and also to assure the safety of any activities to be conducted by you and/or your employees, affiliates,
contractors or designees, using the EVM. Further, you are responsible to assure that any interfaces (electronic and/or mechanical)
between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to
minimize the risk of electrical shock hazard.
3. You will employ reasonable safeguards to ensure that your use of the EVM will not result in any property damage, injury or death, even
if the EVM should fail to perform as described or expected.
4. You will take care of proper disposal and recycling of the EVM’s electronic components and packing materials.
Certain Instructions. It is important to operate this EVM within TI’s recommended specifications and environmental considerations per the
user guidelines. Exceeding the specified EVM ratings (including but not limited to input and output voltage, current, power, and
environmental ranges) may cause property damage, personal injury or death. If there are questions concerning these ratings please contact
a TI field representative prior to connecting interface electronics including input power and intended loads. Any loads applied outside of the
specified output range may result in unintended and/or inaccurate operation and/or possible permanent damage to the EVM and/or
interface electronics. 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 as long as the input and output are maintained at a normal ambient operating temperature. These components include
but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors which can be identified using the
EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during normal operation, please
be aware that these devices may be very warm to the touch. As with all electronic evaluation tools, only qualified personnel knowledgeable
in electronic measurement and diagnostics normally found in development environments should use these EVMs.
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harmless from and against any and all claims, damages, losses, expenses, costs and liabilities (collectively, "Claims") arising out of or in
connection with any use of the EVM that is not in accordance with the terms of the agreement. This obligation shall apply whether Claims
arise under law of tort or contract or any other legal theory, and even if the EVM fails to perform as described or expected.
Safety-Critical or Life-Critical Applications. If you intend to evaluate the components for possible use in safety critical applications (such
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