2
Setup
2.1
Electrostatic Discharge Notice
2.2
Input/Output Connector Descriptions
2.2.1
J1: VIN
2.2.2
J2: VOUT
2.2.3
J3: GND
2.2.4
J4: GND
2.2.5
J5: Output Voltage Selection
Setup
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This section describes the jumpers and connectors on the EVM as well as how to properly connect, set
up, and use the TPS71401EVM.
CAUTION
Many of the components on the TPS71401EVM are susceptible to damage by
electrostatic discharge (ESD). Customers are advised to observe proper ESD
handling precautions when unpacking and handling the EVM, including the use
of a grounded wrist strap at an approved ESD workstation.
Failure to observe proper ESD handling procedures may result in damage to
EVM components.
This connector is the positive input supply voltage. The leads to the input supply should be twisted and
kept as short as possible to minimize electromagnetic interference (EMI) transmission. Additional bulk
capacitance should be added between J1 and J2 if the supply leads are longer than 6 in (15,24 cm). An
additional 47uF or greater capacitor improves the transient response of the TPS71401 and helps to
reduce ringing on the input when long supply wires are used.
This point is the positive connection from the output. Connect this pin to the positive input of the load.
This is the return connection for the input power supply of the regulator.
This point is the return connection for the output.
This jumper is used to select the output voltage of the TPS71401. The jumper selects different feedback
resistors to change the output voltage setting. The output voltage is set by inserting a shorting jumper
across two pins of J5. The preprogrammed output voltages are configured as shown in
Table 2. Output Voltage Setting
Output Voltage (V)
Jumper Between Pins
5.0
1 and 2
3.3
3 and 4
2.7
5 and 6
2.5
7 and 8
TPS71401DRVEVM-426
2
SBVU013 – January 2009
