EVAL-ADM1073MEB View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
'EVAL-ADM1073MEB' PDF : 24 Pages View PDF
An undervoltage glitch is dealt with in a similar way. When VUV
falls below the undervoltage threshold of 0.868 V, the GATE
voltage is pulled low. VUV begins to rise back toward the
operating voltage window, and the GATE drive is restored when
the undervoltage rising threshold (0.868 V plus preset UV
hysteresis level) is reached. Figure 39 illustrates the ADM1073’s
operation in an undervoltage situation.
ADM1073
Figure 39. Timing Waveforms Associated with an Undervoltage Fault
(Ch1 = GATE; Ch2 = UV; Ch3 = PWRGD; Ch4 = SPLYGD)
SOFT START
The ADM1073 offers a variable soft start feature. The value of
the capacitor on the SS pin sets the ramp rate of the inrush
current profile at startup. Figure 40 to Figure 42 show different
inrush current ramp rates for three SS capacitors.
Figure 41. Soft Start Profile with a 1.5 nF Capacitor
(Ch1 = GATE; Ch2 = SENSE)
Figure 42. Soft Start Profile with an 8.2 nF Capacitor
(Ch1 = GATE; Ch2 = SENSE)
Figure 40. Soft Start Profile with a 0.1 nF Capacitor
(Ch1 = GATE; Ch2 = SENSE)
Rev. 0 | Page 19 of 24
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