Data Sheet
ADM1073
Rev. B | Page 21 of 24
LOGIC INPUTS
Figure 46 shows assertion of the level-triggered
SHDN
signal
for 150 ms, causing the ADM1073 to shut down for this
duration.
Figure 46. Timing Waveforms Associated with a RESET Event
(Ch1 = GATE; Ch2 =
SHDN
; Ch3 =
PWRGD
; Ch4 =
SPLYGD
)
Figure 47 shows the assertion of the edge-triggered
RESTART
signal, causing the ADM1073 to shut down for approximately
five seconds before restarting automatically.
Figure 47. Timing Waveforms Associated with a RESTART
Event
(Ch1 = GATE; Ch2 = RESTART
; Ch3 = PWRGD
; Ch4 = SPLYGD
)
KELVIN SENSE RESISTOR CONNECTION
When using a low-value sense resistor for high current
measurement, the problem of parasitic series resistance can
arise. The lead resistance can be a substantial fraction of the
rated resistance, making the total resistance a function of lead
length. This problem can be avoided by using a Kelvin sense
connection. This type of connection separates the current path
through the resistor and the voltage drop across the resistor.
Figure 48 shows the correct way to connect the sense resistor
between the SENSE and V
EE
pins of the ADM1073.
KELVIN SENSE TRACES
SENSE
V
EE
ADM1073
CURRENT
FLOW FROM
LOAD
CURRENT
FLOWTO48V
BACKPLANE
SENSE RESISTOR
Figure 48. Kelvin Sensing with the ADM1073
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