Texas Instruments TPS2553Q1EVM, Руководство пользователя

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Setup and Operation
9 SLVUAT7 – October 2016
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Copyright © 2016, Texas Instruments Incorporated
TPS2553Q1EVM (HVL125A) Precision Current Limiting Switch User Guide
3 Setup and Operation
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. An example of the EVM operation is also included.
3.1 Connectors
There are several types of Input/Output (I/O) connections on the EVM including:
• Input/Output Turret Connections: For both positive and negative (GND) input and output supplies,
banana-plug compatible
• Test Points: For the fault, enable, input, output, and ground connected pins
• Two-Pin Jumpers: For the feedback R
lim
on the I
lim
pin used for current limiting. In this way, four
adjustable current limits are available via jumper
• Two-Pin Jumpers: For manual enable, or auto-retry functionality
Table 2 lists the test points and functional descriptions.
Table 2. Test Point Descriptions
TEST POINT
NUMBER
TEST POINT
SILKSCREEN
LABEL
FUNCTION DESCRIPTION
TP1 VIN Voltage Monitoring and Probing Input voltage monitoring
TP2 VIN Voltage Input Input voltage connection
TP3 VOUT Voltage Monitoring and Probing Output voltage monitoring
TP4 GND GND Input ground connection
TP5 VOUT Voltage Output Output voltage connection
TP6 GND GND Output ground connection
TP7 EN Voltage Monitoring and Probing Enable signal voltage monitoring
TP8 GND Voltage Monitoring and Probing Ground connection point
TP9 GND Voltage Monitoring and Probing Ground connection point
TP10 FAULT Voltage Monitoring and Probing Fault signal voltage monitoring
3.2 Jumper Settings and Configuration
The jumpers onboard the TPS2553Q1EVM may be put into two functional categories. The first set of
jumpers may either manually set the enable signal to a logic high or low, or utilize the auto-retry
functionality of the device. See the TPS2553-Q1 datasheet for additional information. The auto-retry time
is dependant on the RC delay given by R6 and C5 on the EVM. Either J6 or J1 and J2 should be active to
exercise these two modes of operation.
Table 3 includes jumper settings for auto-retry mode along with
the wait time in between tries.
Table 3. Manual Enable or Auto-Retry Jumpers
DEVICE MODE JUMPERS AUTO RETRY TIME (ms)
Auto-Retry J1 AND J2 10
Manual Enable J6
A more detailed overview of the current limiting options on the EVM is given in Table 4 . The EVM is
designed with feedback resistance such that the minimum current limit satisfies the listed applications and
current values in the table. The actual output current values may be slightly higher. To achieve current
limits in
Table 4 , use only one jumper at a time on jumpers J3, J4, and J5.