8 Momentus 4200 N-Lite Product Manual, Rev. A
*During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and
power to operational levels.
2.9.1.1 Typical current profile
Figure 2. Typical 5V startup and operation current profile
2.9.2 Conducted noise
Input noise ripple is measured at the host system power supply across an equivalent 15-ohm resistive load on
the +5 volt line.
Using 5-volt power, the drive is expected to operate with a maximum of 100 mV peak-to-peak square-wave
injected noise at up to 10 MHz.
Note. Equivalent resistance is calculated by dividing the nominal voltage by the typical RMS read/write
current.
2.9.3 Voltage tolerance
Voltage tolerance (including noise): 5V ± 5%
Seeking 2.4 0.48
Read 2.4 0.48
Write 2.4 0.48
Standby 0.36 0.07
Sleep 0.36 0.07
Table 2: DC power
Power dissipation (watts) Average (watts, 25° C) 5V typical amps
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
0.0
0.2
0.4
0.6
0.8
1.0
mps
Seconds
+5 Volt Current during spindle start — Typical Amperes
1.2
4
