User's Guide
SBVU023 – August 2014
TPS3847085EVM-577 Evaluation Module
This user’s guide describes the operational use of the TPS3847085EVM-577 evaluation module (EVM) as
a reference design for engineering demonstration and evaluation of the TPS3847085, an ultralow-power,
wide supply voltage, supervisory circuit. Included in this user’s guide are setup instructions, a schematic
diagram, printed circuit board (PCB) layout drawings, and a bill of materials for the EVM.
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Contents
Introduction ...................................................................................................................
Hardware......................................................................................................................
2.1
Input and Output Connectors .....................................................................................
2.2
Components .........................................................................................................
Setup and Test ...............................................................................................................
Operation .....................................................................................................................
Board Layout .................................................................................................................
Schematic .....................................................................................................................
Bill of Materials ...............................................................................................................
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2
2
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3
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4
5
5
List of Figures
...............................................................................................................
1
Top Silkscreen
2
Top Layer Routing ........................................................................................................... 4
4
3
Bottom Layer Routing ....................................................................................................... 4
4
TPS3847085EVM-577 Schematic ......................................................................................... 5
List of Tables
1
TPS3847085EVM-577 Bill of Materials ................................................................................... 5
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TPS3847085EVM-577 Evaluation Module
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1
Introduction
1
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Introduction
The Texas Instruments TPS3847085EVM-577 EVM helps design engineers to evaluate the operation and
performance of the TPS3847xxx family of supervisors for possible use in their own circuit applications.
This particular EVM configuration contains the TPS3847085 supervisor with an internal push-pull RESET
output, in a 5-pin, DBV (SOT-23) package. The TPS3847xxx is an ultralow quiescent current, supervisory
circuit with a fixed threshold voltage. The threshold voltage is indicated by the last three digits of the part
number. In this case, 085 indicates the 8.5-V, fixed-threshold version; other values indicate various fixed
thresholds. This document describes the configuration and setup of the TPS3847085EVM-577 EVM
board.
2
Hardware
This section describes the connectors on the EVM, as well as how to properly connect, set up, and use
the TPS3847085EVM-577.
2.1
2.1.1
Input and Output Connectors
J1—VDD
The power-supply connection and the signal that is being monitored by the TPS3847085. RESET
transitions low when the power-supply voltage drops below the threshold. Two pins are provided to allow
space for multiple connections. Note that the device data sheet uses VCC to denote the power supply. In
this case, VCC and VDD are functionally equivalent.
2.1.2
J2—GND
Return connector for the input power supply. Two pins are provided to allow space for multiple
connections.
2.1.3
J3—RESET
This connector is the RESET output. Connect this output to a multimeter, oscilloscope, or external circuit
to verify that RESET goes low when VDD goes below the threshold. Two pins are provided to allow space
for multiple connections.
2.1.4
J4—VPU
VPU is the test point connection to the MR pin. If manual reset is required, then an external source is
required. Connect this external source to the VPU terminal. If manual reset is not required, place a
shorting jumper on J4 connecting VPU (and thus MR) to VDD.
2.1.5
J5—RPU
This connector is used for the pull-up version of the TPS3847, and is not connected for the push-pull
version. Connect the RPU terminal to a power supply; the voltage on this power supply is the logic-high
value for RESET. Two pins are provided to allow space for multiple connections.
2.2
2.2.1
Components
S1
This switch is normally open and connected to MR and GND. Use this switch to trigger a manual reset
event instead of using an external supply.
2.2.2
C1
This 100-nF input capacitor is connected to VDD and GND. Although not required for proper device
operation, this capacitor helps reduce the impedance of the input supply line. Use this capacitor in order to
reduce the effects of the periodic increased quiescent current when the reference voltage is refreshed.
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TPS3847085EVM-577 Evaluation Module
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Setup and Test
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2.2.3
R1
This 47-kΩ resistor is used only for the pull-up version of the TPS3847, and is not installed on this EVM.
2.2.4
R2
This 1-MΩ resistor connects the VPU jumper (J4) to the MR pin and S1. This resistor allows MR to be
shorted to GND without drawing excessive amounts of current from the power supply connected to VPU.
3
Setup and Test
•
•
•
•
•
4
Set the input power supply voltage to 0 V. Connect the positive voltage lead from the power supply to
J1 (VDD). Connect the ground lead from the power supply to J2 (GND).
Short VPU to VDD using a jumper, or connect it to a separate power supply.
Connect a voltmeter across J3 (RESET) and J2 (GND).
Vary the input power-supply voltage as necessary for test purposes.
Vary the power supply connected to VPU as necessary, or use S1 to short MR to GND in order to test
the manual reset functionality.
Operation
The TPS3847085EVM-577 is a fixed, single-rail monitor, and triggers a reset when its own supply rail
VDD falls below the set threshold of 8.5 V. An internal push-pull RESET circuit eliminates the need for a
pull-up resistor.
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Board Layout
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Board Layout
Figure 1. Top Silkscreen
Figure 2. Top Layer Routing
Figure 3. Bottom Layer Routing
4
TPS3847085EVM-577 Evaluation Module
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Schematic
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6
Schematic
VPU
VDD
VDD
J4
RPU
J1
J5
C1
0.1 µF
R2
1 M
R1
1
47 k
VDD
TPS3847
RESET
MR
RESET
J3
S1
GND
GND
J2
1
Not
Installed
Figure 4. TPS3847085EVM-577 Schematic
7
Bill of Materials
Table 1. TPS3847085EVM-577 Bill of Materials (1) (2) (3)
Qty
Designator
Value
(2)
(3)
(4)
Part Number
Manufacturer
402
STD
STD
Header, Male 2-pin, 100mil spacing,
0.100 inch x 2
PEC02SAAN
Sullins
C1
5
J1, J2, J3,
J4, J5
0
R1
47 kΩ
RES 47K OHM 1/20W 5% 0201 SMD
0603
ERJ-1GEJ473C
Panasonic
1
R2
1 MΩ
RES, 1.00Meg ohm, 1%, 0.1W, 0603
0603
CRCW06031M00FKEA
Vishay-Dale
1
S1SH-J4
1x2
Shunt, 100mil, Gold plated, Black
Shunt
969102-0000-DA
3M
Switch, Tactile, SPST-NO, 1VA, 32V,
SMT
6.3 x 5.36 x 6.6 mm, SMT
KT11P2JM34LFS
C&K
Components
IC, Supply Voltage Supervisory Circuit,
8.5V
SOT23-5
TPS3847085DBV
TI
PCB, 1.30 in x 1.645 in x 0.062 in
1.30 in x 1.70 in x 0.062 in
PWR577
Any
S1
1
U1 (4)
1
(1)
Size
1
1
100 nF
Description
Capacitor, Ceramic Chip, 20V, X5R,
±10%
These assemblies are electrostatic-discharge (ESD) sensitive; observe ESD precautions.
These assemblies must be clean and free from flux and all contaminants. Do not use no-clean flux.
These assemblies must comply with workmanship standards IPC-A-610 Class 2.
Cannot be substituted. All other components can be substituted with equivalent manufacturer components.
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Copyright © 2014, Texas Instruments Incorporated
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ADDITIONAL TERMS AND CONDITIONS, WARNINGS, RESTRICTIONS, AND DISCLAIMERS FOR
EVALUATION MODULES
Texas Instruments Incorporated (TI) markets, sells, and loans all evaluation boards, kits, and/or modules (EVMs) pursuant to, and user
expressly acknowledges, represents, and agrees, and takes sole responsibility and risk with respect to, the following:
1.
User agrees and acknowledges that EVMs are intended to be handled and used for feasibility evaluation only in laboratory and/or
development environments. Notwithstanding the foregoing, in certain instances, TI makes certain EVMs available to users that do not
handle and use EVMs solely for feasibility evaluation only in laboratory and/or development environments, but may use EVMs in a
hobbyist environment. All EVMs made available to hobbyist users are FCC certified, as applicable. Hobbyist users acknowledge, agree,
and shall comply with all applicable terms, conditions, warnings, and restrictions in this document and are subject to the disclaimer and
indemnity provisions included in this document.
2. Unless otherwise indicated, EVMs are not finished products and not intended for consumer use. EVMs are intended solely for use by
technically qualified electronics experts who are familiar with the dangers and application risks associated with handling electrical
mechanical components, systems, and subsystems.
3. User agrees that EVMs shall not be used as, or incorporated into, all or any part of a finished product.
4. User agrees and acknowledges that certain EVMs may not be designed or manufactured by TI.
5. User must read the user's guide and all other documentation accompanying EVMs, including without limitation any warning or
restriction notices, prior to handling and/or using EVMs. Such notices contain important safety information related to, for example,
temperatures and voltages. For additional information on TI's environmental and/or safety programs, please visit www.ti.com/esh or
contact TI.
6. User assumes all responsibility, obligation, and any corresponding liability for proper and safe handling and use of EVMs.
7. Should any EVM not meet the specifications indicated in the user’s guide or other documentation accompanying such EVM, the EVM
may be returned to TI within 30 days from the date of delivery for a full refund. THE FOREGOING LIMITED WARRANTY IS THE
EXCLUSIVE WARRANTY MADE BY TI TO USER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR
STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. TI SHALL
NOT BE LIABLE TO USER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES RELATED TO THE
HANDLING OR USE OF ANY EVM.
8. 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 EVMs might be or are used. TI currently deals with a variety of customers, and therefore TI’s 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 with respect to the handling or use of EVMs.
9. User assumes sole responsibility to determine whether EVMs may be subject to any applicable federal, state, or local laws and
regulatory requirements (including but not limited to U.S. Food and Drug Administration regulations, if applicable) related to its handling
and use of EVMs and, if applicable, compliance in all respects with such laws and regulations.
10. User has sole responsibility to ensure the safety of any activities to be conducted by it and its employees, affiliates, contractors or
designees, with respect to handling and using EVMs. Further, user is responsible to ensure that any interfaces (electronic and/or
mechanical) between EVMs 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.
11. User shall employ reasonable safeguards to ensure that user’s use of EVMs will not result in any property damage, injury or death,
even if EVMs should fail to perform as described or expected.
12. User shall be solely responsible for proper disposal and recycling of EVMs consistent with all applicable federal, state, and local
requirements.
Certain Instructions. User shall operate EVMs within TI’s recommended specifications and environmental considerations per the user’s
guide, accompanying documentation, and any other applicable requirements. Exceeding the specified ratings (including but not limited to
input and output voltage, current, power, and environmental ranges) for EVMs may cause property damage, personal injury or death. If
there are questions concerning these ratings, user should 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 applicable 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 EVMs’ schematics located in the applicable EVM user's guide. When
placing measurement probes near EVMs during normal operation, please be aware that EVMs may become very warm. As with all
electronic evaluation tools, only qualified personnel knowledgeable in electronic measurement and diagnostics normally found in
development environments should use EVMs.
Agreement to Defend, Indemnify and Hold Harmless. User agrees to defend, indemnify, and hold TI, its directors, officers, employees,
agents, representatives, affiliates, licensors and their representatives harmless from and against any and all claims, damages, losses,
expenses, costs and liabilities (collectively, "Claims") arising out of, or in connection with, any handling and/or use of EVMs. User’s
indemnity shall apply whether Claims arise under law of tort or contract or any other legal theory, and even if EVMs fail to perform as
described or expected.
Safety-Critical or Life-Critical Applications. If user intends to use EVMs in evaluations of safety critical applications (such as life support),
and a failure of a TI product considered for purchase by user for use in user’s product would reasonably be expected to cause severe
personal injury or death such as devices which are classified as FDA Class III or similar classification, then user must specifically notify TI
of such intent and enter into a separate Assurance and Indemnity Agreement.
RADIO FREQUENCY REGULATORY COMPLIANCE INFORMATION FOR EVALUATION MODULES
Texas Instruments Incorporated (TI) evaluation boards, kits, and/or modules (EVMs) and/or accompanying hardware that is marketed, sold,
or loaned to users may or may not be subject to radio frequency regulations in specific countries.
General Statement for EVMs Not Including a Radio
For EVMs not including a radio and not subject to the U.S. Federal Communications Commission (FCC) or Industry Canada (IC)
regulations, TI intends EVMs to be used only for engineering development, demonstration, or evaluation purposes. EVMs are not finished
products typically fit for general consumer use. EVMs may nonetheless generate, use, or radiate radio frequency energy, but have not been
tested for compliance with the limits of computing devices pursuant to part 15 of FCC or the ICES-003 rules. Operation of such EVMs 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: For EVMs including a radio, the radio included in such EVMs is intended for development and/or
professional use only in legally allocated frequency and power limits. Any use of radio frequencies and/or power availability in such EVMs
and their development application(s) must comply with local laws governing radio spectrum allocation and power limits for such EVMs. It is
the user’s sole responsibility to only operate this radio in legally acceptable frequency space and within legally mandated power limitations.
Any exceptions to this are strictly prohibited and unauthorized by TI unless user has obtained appropriate experimental and/or development
licenses from local regulatory authorities, which is the sole responsibility of the user, including its acceptable authorization.
U.S. Federal Communications Commission Compliance
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 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 its 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.
Industry Canada Compliance (English)
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.
Canada Industry Canada Compliance (French)
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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EVMs entering Japan are NOT certified by TI as conforming to Technical Regulations of Radio Law of Japan.
If user uses EVMs in Japan, user is required by Radio Law of Japan to follow the instructions below with respect to EVMs:
1.
2.
3.
Use EVMs in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal Affairs and
Communications on March 28, 2006, based on Sub-section 1.1 of Article 6 of the Ministry’s Rule for Enforcement of Radio Law of
Japan,
Use EVMs only after user obtains the license of Test Radio Station as provided in Radio Law of Japan with respect to EVMs, or
Use of EVMs only after user obtains the Technical Regulations Conformity Certification as provided in Radio Law of Japan with respect
to EVMs. Also, do not transfer EVMs, unless user gives the same notice above to the transferee. Please note that if user does not
follow the instructions above, user will be subject to penalties of Radio Law of Japan.
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