Texas Instruments TPS3702CX33EVM-683 User manual

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TPS3702CX33EVM-683 High accuracy window voltage detector evaluation
module for OV/UV monitoring
User's Guide
SBVU026A–January 2015–Revised February 2019
TPS3702CX33EVM-683 High accuracy window voltage
detector evaluation module for OV/UV monitoring
This user’s guide describes the operational use of the TPS3702CX33EVM-683 evaluation module (EVM)
as a reference design for engineering demonstration and evaluation of the TPS3702CX33, an ultralow-
power, wide supply voltage, window voltage detector for over and undervoltage monitoring. 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.
Throughout this document, the terms EVM, demonstration kit, evaluation board, and evaluation module
are synonyms with the TPS3702CX33EVM-683 evaluation module.
Contents
1 Introduction ................................................................................................................... 2
2 Hardware...................................................................................................................... 2
2.1 Input and Output Connectors ..................................................................................... 2
2.2 Components......................................................................................................... 3
3 Setup and Test............................................................................................................... 4
4 Operation ..................................................................................................................... 4
5 PCB Layout................................................................................................................... 5
6 Schematic..................................................................................................................... 6
7 Bill of Materials............................................................................................................... 6
List of Figures
1 Top Layer Routing........................................................................................................... 5
2 Bottom Layer Routing....................................................................................................... 5
3 TPS3702CX33EVM-683 Schematic....................................................................................... 6
List of Tables
1 TPS3702CX33EVM-683 Bill of Materials ................................................................................ 6
Trademarks
All trademarks are the property of their respective owners.

Introduction www.ti.com
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1 Introduction
The Texas Instruments' TPS3702CX33EVM-683 EVM helps design engineers to evaluate the operation
and performance of the TPS3702 family of overvoltage and undervoltage monitors for possible use in their
own circuit applications. This particular EVM configuration contains the TPS3702CX33 window voltage
detector for overvoltage and undervoltage monitoring with open-drain output, in a 6-pin, DDC (SOT)
package. The TPS3702 is a high-accuracy window voltage detector with fixed-voltage threshold options
and a wide range of operational supply voltages. The nominal voltage rail that the device monitors is
indicated by the last two digits of the part number. In this case, 33 indicates the fixed threshold version
intended to monitor a nominal rail of 3.3 V. This document describes the configuration and setup of the
TPS3702CX33EVM-683.
2 Hardware
This section describes the connectors on the EVM, as well as how to properly connect, set up, and use
the TPS3702CX33EVM-683.
2.1 Input and Output Connectors
2.1.1 J1 and J2: VCC
The power-supply connectors. Two terminals are provided for multiple connections.
NOTE: The TPS3702 data sheet uses VDD to denote the power supply. In this case, VCC and VDD
are functionally equivalent.
2.1.2 J3 and J4: GND
Return connectors for the input power supply. Two terminals are provided for multiple connections.
2.1.3 J5 and J6: OV
These terminals connect to the overvoltage output. Connect this output to a multimeter, oscilloscope, or
external circuit to verify that OV goes low when SENSE exceeds the overvoltage threshold. Two terminals
are provided for multiple connections.
2.1.4 J7 and J8: UV
These terminals connect to the undervoltage output. Connect this output to a multimeter, oscilloscope, or
external circuit to verify that UV goes low when SENSE drops below the undervoltage threshold. Two
terminals are provided for multiple connections.
2.1.5 JP1: SET
This jumper is used to the connect the SET pin to VCC or GND. To connect the SET pin to a voltage other
than VCC or GND, connect an external source to the center pin. The SET pin has a maximum operational
rating of 6.5 V, but VCC can tolerate 18 V; therefore, a resistor divider is used to help safeguard against
electrically overstressing this pin when shorting SET to VCC using the jumper. See Section 2.2.4 for more
information on the resistor divider.
NOTE: Force the SET pin high or low. Floating the SET pin may require the device to be reset.

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2.1.6 JP2: SENSE
This jumper is used to connect the SENSE pin to VCC if the device monitors the supply voltage. To
connect the SENSE pin to a voltage other than VCC, connect an external source to the right-side pin. The
SENSE pin has a maximum operational rating of 6.5 V, but VCC can tolerate 18 V. Therefore, be careful
not to short SENSE to VCC using this jumper if the voltage on VCC is greater than 6.5 V because shorting
SENSE to VCC under this condition may cause electrical overstress and damage the device.
2.1.7 JP3: OV PU and UV PU
The OV PU and UV PU jumpers connect to the pull up voltage, and set the logic level for the overvoltage
and undervoltage signals. Use the installed jumpers to connect OV PU and UV PU to VCC, or use the
outermost terminals (labeled OV PU and UV PU) to connect to an external source (or sources)
2.1.8 TP1 and TP2: GND
These test points are connected to the ground plane, and allow for easier ground connections on the right-
hand side of the board for measuring equipment, such as scope probes.
2.2 Components
2.2.1 C1
This 10-nF input capacitor is connected to VCC and GND. Although not required for proper device
operation, this capacitor helps reduce the impedance and noise of the input supply line.
2.2.2 R1 and R2
These 10-kΩresistors are used to connect the OV and UV pins to the desired pull-up voltage. R1 is
connected to UV and R2 is connected to OV.
2.2.3 R3
This 0-Ωresistor connects the OV and UV outputs together to create a wired-OR solution that is low if
either output is low. This EVM does not have this component installed; add this component, if required.
2.2.4 R4 and R5
The R4 (3.3-MΩ) and R5 (1.8-MΩ) resistors are used to safeguard the SET pin when JP1 is set to VCC.
These resistors form a resistor divider connected between VCC and GND.

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3 Setup and Test
1. Set the input power supply voltage to 0 V.
2. Connect the ground lead from the power supply to J3 (GND).
3. Connect the positive voltage lead from the power supply to J1 (VCC).
4. Short SENSE to VCC using a jumper, or connect it to a separate power supply.
5. Short SET to VCC using a jumper, or connect it to a separate power supply.
6. Short OV PU and UV PU to VCC using a jumper, or connect it to a separate power supply.
7. Connect a voltmeter or scope across J5 and J7 (OV and UV) and J4 (GND).
8. Vary the input power-supply voltage as necessary for test purposes.
9. Vary the monitored voltage as necessary for test purposes.
10. Vary the power supplies connected to OV PU and UV PU as necessary for test purposes.
4 Operation
The TPS3702CX33EVM-683 is a fixed-threshold, single-rail monitor, and triggers a reset when the
monitored supply rail connected to SENSE exits the accuracy band. Pull-up resistors are used to generate
the overvoltage and undervoltage signals.

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5 PCB Layout
Figure 1. Top Layer Routing
Figure 2. Bottom Layer Routing

Schematic www.ti.com
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6 Schematic
Figure 3. TPS3702CX33EVM-683 Schematic
7 Bill of Materials
(1) These assemblies are electrostatic-discharge (ESD) sensitive; observe ESD precautions.
(2) These assemblies must be clean and free from flux and all contaminants. Do not use no-clean flux.
(3) These assemblies must comply with workmanship standards IPC-A-610 Class 2.
Table 1. TPS3702CX33EVM-683 Bill of Materials(1)(2)(3)
Designator Qty Value Description Size (Package Reference) Part Number Manufacturer
C1 1 0.01 µF Capacitor, Ceramic, 0.01 µF, 25
V, ±10%, X7R, 0603 603 GRM188R71E103KA01D MuRata
J1, J2, J3, J4, J5, J6, J7,
J8 8 SMT Test Point, Compact, SMT Testpoint_Keystone_ Compact 5016 Keystone
JP1 1 — Header, TH, 100-mil, 3x1, Gold
plated, 230 mil above insulator 3x1 Header TSW-103-07-G-S Samtec
JP2 1 — Header, TH, 100-mil, 2x1, Gold
plated, 230 mil above insulator 2x1 Header TSW-102-07-G-S Samtec
JP3 1 — Header, TH, 100-mil, 4x1, Gold
plated, 230 mil above insulator 4x1 Header TSW-104-07-G-S Samtec

www.ti.com Bill of Materials
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Table 1. TPS3702CX33EVM-683 Bill of Materials(1)(2)(3) (continued)
Designator Qty Value Description Size (Package Reference) Part Number Manufacturer
(4) Cannot be substituted. All other components can be substituted with equivalent manufacturer components.
R1, R2 2 10.0 kΩResistor, 10.0 kΩ, 1%,
0.1 W, 0603 603 RC0603FR-0710KL Yageo America
R4 1 3.3 MΩResistor, 3.3 MΩ, 5%,
0.1 W, 0603 603 CRCW06033M30JNEA Vishay-Dale
R5 1 1.8 MΩResistor, 1.8 MΩ, 5%,
0.1 W, 0603 603 CRCW06031M80JNEA Vishay-Dale
SH-JP1, SH-JP2, SH-
JP31, SH-JP32 4 1 x 2 Shunt, 100-mil, Gold-plated, Black Shunt 969102-0000-DA 3M
TP1, TP2 2 SMT Test Point, Miniature, SMT Testpoint_Keystone_
Miniature 5015 Keystone
U1(4) 1 — IC, High-Accuracy Window
Voltage Detector, DDC0006A DDC0006A TPS3702CX33DDC Texas Instruments
R3 0 0 Resistor, 0 Ω, 5%, 0.1 W, 0603 603 CRCW06030000Z0EA Vishay-Dale

Revision History www.ti.com
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Revision History
Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Original (January 2015) to A Revision .................................................................................................... Page
• Changed "supervisor" to "detector", updated title..................................................................................... 1

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