Texas Instruments LM5064EVK, User Manual, Page: 10 / 28

Customizing the Design
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10 SNVA481B – October 2011 – Revised January 2020
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AN-2143 LM5064 Evaluation Kit
The Warning and Fault Threshold tab allows configuration of the input under-voltage, input over-voltage,
output under-voltage, input over-current, input power, and over temperature warnings. This tab also allows
adjustment of the over-temperature fault threshold. Fault threshold for the input over- and under-voltage,
current limit, power limit, and power good are set by the hardware design. Decimal values for the
thresholds are shown in the text box located to the right of the slider bar. Above the decimal values setting
is the value of the setting in hexadecimal, which can be useful when developing software for this device.
The fault behavior tab allows the user to set the device fault configuration and fault masking. The fault
configuration section allows the user to set the number of retries, as well as the circuit breaker and current
limit thresholds. The number of retries can be set by the RETRY pin to be infinite or latched off. Through
software, the number of retries can be set to 0 (latch-off), 1, 2, 4, 8, 16 or infinite. The software settings
are independent of the hardware settings; however, if the power is cycled the device will default to values
dictated by the hardware. Current limit power-up values are also set by the hardware. The values for
current limit can be set to either 26 mV (CL = VDD) or 50 mV (CL = VEE). The circuit breaker threshold
can also be set in software to either 1.9 times or 3.9 times the current limit value. Fault masking is
possible for many of the device fault conditions. Fault conditions allow masking of both the MOSFET
response and the SMBus alert signal. Note that if a fault occurs repeatedly while the MOSFET is masked,
damage to the MOSFET may result. This feature is allowed primarily for debug purposes. Faults that do
not shut off the MOSFET, and only issue a SMBus alert, will also allow masking of the alert. Note the
power-up default setting for the power good signal is to mask the SMBus alert, in order to ensure that
SMBus alert is not asserted immediately after power-up.
For convenience, the Device Configuration Panel can be undocked by holding down the left mouse button
while the cursor is at the top of the panel and dragging it to where you would like it to be placed.
10 Customizing the Design
The GUI assumes the hardware configuration is set to default evaluation board configuration. If any of the
components are changed, the device hardware configuration needs to be updated in the design tool
section. To open the design tool click the wrench icon located on the LM5064 block representation which
will open the window displayed in
Figure 10 .
Figure 10. LM5064 Design Tool