Texas Instruments MSA025, Руководство пользователя

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EVM Connectors
7 SLVUAY9 – November 2016
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Copyright © 2016, Texas Instruments Incorporated
TPS3808G01-Q1EVM (MSA025) Voltage Supervisor User Guide
3 EVM Connectors
This section describes the connectors, jumpers, and test points on the EVM as well as how to connect, set
up, and properly use the EVM. Each device has an independent supply connection, but all grounds are
connected on the board.
3.1 EVM Test Points
Table 2 lists the test points and functional descriptions. All pins of the device are broken out to test points
on the EVM.
Table 2. Test Points
Test Point
Number
Test Point
Silkscreen
Label
Function Description
TP1 RST Connection to RST pin Allows user to put an external connection and monitor
the RST pin
TP2 GND Ground Common ground connection
TP3 MR Connection to MR pin Allows user to put an external connection or monitor
the MR pin
TP4 SENSE Connection to SENSE pin Allows user to put an external connection or monitor
SENSE pin
3.2 EVM Jumpers
Table 3 lists the jumpers on the TPS3808G01-Q1EVM. As ordered, the EVM will have five jumpers
installed.
Table 3. List of Onboard Jumpers
Jumper Default Connection Description
J2 Open
Connect SENSE to VDD through a resistor divider that sets V
IT
to 1.8V and monitors
VDD to this threshold, or leave open and connect external voltage to be monitored.
J3 Open
Connect C
T
to VDD through a 40-k Ω resistor or leave open for fixed delay times, or
connect to GND through a 100-pF capacitor for user-programmable delay time.
4 EVM Setup and Operation
This section describes the functionality and operation of the TPS3808G01-Q1EVM. The user should read
the
TPS382x-Q1 datasheet for electrical characteristics of the device.
4.1 Input Power (VDD)
The VDD supply is connected through the J1 header on board. Pin 1 of this jumper is connected to the
VDD pin of the TPS3808G01-Q1 device and pin 2 is connected to the board common GND. Supply
voltage is dependent on what the user wants to monitor, but the range is 1.8 V to 6.5 V.
Table 4 details
the nominal supply and typical threshold voltage.
Table 4. Nominal Supply and Typical Threshold Voltages
Device Nominal Supply Voltage (V) Typical Threshold Voltage (V)
TPS3808G01-Q1 Adjustable 0.405