Texas Instruments Evaluation Module for TPS7A4001 Low-Dropout Linear Regulator TPS7A4001EVM-709 TPS7A4001EVM-709 데이터 시트
제품 코드
TPS7A4001EVM-709
Setup
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2
Setup
This section describes the jumpers and connectors on the EVM as well as how to properly connect, setup
and use the TPS7A4001EVM.
and use the TPS7A4001EVM.
2.1
Input/Output Connector and Jumper Descriptions
•
J1-EN: Output enable. To enable the output, connect a jumper to short ON (pin 1) to EN (center pin 2).
To disable the output, connect a jumper to short EN (pin 2) to OFF (pin 3).
To disable the output, connect a jumper to short EN (pin 2) to OFF (pin 3).
•
J2 – VIN: Input power supply voltage connector. The positive input lead and ground return lead from
the input power supply should be twisted and kept as short as possible to minimize EMI transmission.
Additional bulk capacitance should be added between J2 and J4 if the supply leads are greater than
six inches. For example, an additional 47µF electrolytic capacitor connected from J2 to ground can
improve the transient response of the TPS7A4001 while eliminating unwanted ringing on the input due
to long wire connections
the input power supply should be twisted and kept as short as possible to minimize EMI transmission.
Additional bulk capacitance should be added between J2 and J4 if the supply leads are greater than
six inches. For example, an additional 47µF electrolytic capacitor connected from J2 to ground can
improve the transient response of the TPS7A4001 while eliminating unwanted ringing on the input due
to long wire connections
•
J4 – GND: Ground-return connector for the input power supply
•
J3 – VOUT: Regulated output voltage connector.
•
J5 – GND: Output ground-return connector.
2.2
Soldering Guidelines
Any solder re-work to modify the EVM for the purpose of repair or other application reasons must be
performed using a hot-air system to avoid damaging the integrated circuit IC especially.
performed using a hot-air system to avoid damaging the integrated circuit IC especially.
2.3
Equipment Interconnect
•
Turn off the input power supply after verifying that its output voltage is set to the desired supply voltage
(less than 100V) and the current limit is set to approximately 100mA. Connect the positive voltage lead
from input power supply to VIN, at the J2 connector of the EVM. Connect the ground lead from the
input power supply to GND at the J4 connector of the EVM.
(less than 100V) and the current limit is set to approximately 100mA. Connect the positive voltage lead
from input power supply to VIN, at the J2 connector of the EVM. Connect the ground lead from the
input power supply to GND at the J4 connector of the EVM.
•
Connect a 0-50mA load (ILoad) between VOUT, at the J3 connector, and the GND, at the J4
connector.
connector.
•
Disable the output by connecting a jumper at J1 to short the EN (pin 2) to the OFF (pin 3).
3
Operation
•
Turn on the input power supply. Verify that the output voltage is near 0.V.
•
Enable the output by reconnecting the jumper on J1 to short the EN (pin 2) to the ON (pin 1).
•
• Vary the load current and VIN voltage as necessary for test purposes. Note that at room temperature
(25°C) the power dissipation (P
(25°C) the power dissipation (P
disp
) across the TPS7A4001.
P
disp
= (VIN – VOUT) x I
Load
(1)
2
TPS7A4001EVM-709
SLVU448 – March 2011
© 2011, Texas Instruments Incorporated