Texas Instruments Evaluation Module for TPS72718 TPS72718YFFEVM-407 TPS72718YFFEVM-407 Datenbogen
Produktcode
TPS72718YFFEVM-407
Setup
www.ti.com
2
Setup
This chapter describes the jumpers and connectors on the EVM as well as how to properly connect, setup,
and use the TPS727xxEVM.
and use the TPS727xxEVM.
2.1
Input / Output Connector Descriptions
2.1.1
J1 – VIN
This is the positive input supply voltage. The leads to the input supply should be twisted and kept as short
as possible to minimize EMI transmission. Additional bulk capacitance should be added between J1 and
J2 if the supply leads are greater than six inches. An additional 47µF or greater capacitor improves the
transient response of the TPS727xx and helps to reduce ringing on the input when long supply wires are
used.
as possible to minimize EMI transmission. Additional bulk capacitance should be added between J1 and
J2 if the supply leads are greater than six inches. An additional 47µF or greater capacitor improves the
transient response of the TPS727xx and helps to reduce ringing on the input when long supply wires are
used.
2.1.2
J3 – VOUT
This is the positive connection from the output. Connect this pin to the positive input of the load.
2.1.3
J2 – GND
This is the return connection for the input power supply of the regulator.
2.1.4
J4 – GND
This is the return connection for the output.
2.1.5
JP1 – ENABLE
This jumper is used to enable or disable the output of the TPS727xx. Placing a shorting jumper between
pins 1 and 2 ('ON' position) will enable the TPS727xx. Placing the shorting jumper between pins 2 and 3
('OFF' position) will disable the TPS727xx.
pins 1 and 2 ('ON' position) will enable the TPS727xx. Placing the shorting jumper between pins 2 and 3
('OFF' position) will disable the TPS727xx.
3
Operation
This chapter provides information about the operation of the TPS727xxEVM.
3.1
Operation
Connect the positive input power supply to J1. Connect the input power return (ground) to J2. The
TPS727xxEVM has an absolute maximum input voltage of 6.0V. The recommended maximum operating
voltage is 5.5V. The actual highest input voltage may be less than 5.5V due to thermal conditions. See the
Thermal Considerations section of this manual to determine if the highest input voltage.
TPS727xxEVM has an absolute maximum input voltage of 6.0V. The recommended maximum operating
voltage is 5.5V. The actual highest input voltage may be less than 5.5V due to thermal conditions. See the
Thermal Considerations section of this manual to determine if the highest input voltage.
Connect the desired load between J3 (positive lead) and J4 (negative or return lead). Configure jumper J6
for the desired output voltage.
for the desired output voltage.
4
Thermal Guidelines
This chapter provides guidelines for the thermal management of the TPS727xxYFFEVM-407 board.
4.1
Thermal Considerations
Thermal management is a key component of design of any power converter and is especially important
when the power dissipation in the LDO is high. To better help you design the TPS727xx family into your
application, the following formula should be used to approximate the maximum power dissipation at a
particular ambient temperature:
when the power dissipation in the LDO is high. To better help you design the TPS727xx family into your
application, the following formula should be used to approximate the maximum power dissipation at a
particular ambient temperature:
T
J
= T
A
+ P
d
×
q
JA
(1)
where T
J
is the junction temperature, T
A
is the ambient temperature, P
d
is the power dissipation in the IC
and
q
JA
is the thermal resistance from junction to ambient. All temperatures are in degrees Celsius.
2
TPS727xxYFF EVM
SLVU323 – February 2010
Copyright © 2010, Texas Instruments Incorporated