ADM1073 Analog Devices, ADM1073 Datasheet - Page 21

• Manufacturer Part Number: ADM1073
• Description: -48 V Full Feature Hot Swap Controller
• Manufacturer: Analog Devices

Specifications of ADM1073

• I Control Accuracy %: 3%
• Other Inputs: RESTARTb,SHDNb
• Other Outputs: LATCHEDb,PWRGDb,SPLYGDb
• Package: 14-ld TSSOP
• Vin Min (v): -18V
• Vin Max (v): -80V
• Uv & Ov Detection: UV pin, OV pin

Data Sheet
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 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
Figure 46. Timing Waveforms Associated with a RESET Event
(Ch1 = GATE; Ch2 = RESTART ; Ch3 = PWRGD ; Ch4 = SPLYGD )
(Ch1 = GATE; Ch2 = SHDN ; Ch3 = PWRGD ; Ch4 = SPLYGD )
Rev. A | Page 21 of 24
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
KELVIN SENSE TRACES
CURRENT
FLOW FROM
LOAD
Figure 48. Kelvin Sensing with the ADM1073
ADM1073
SENSE
SENSE RESISTOR
EE
pins of the ADM1073.
V
EE
CURRENT
FLOW TO –48V
BACKPLANE
ADM1073