Fujitsu MBA3073FD, Product Manual

Page: 54 / 106

Installation Requirements
4.2 Power Supply Requirements
(1) Allowable input voltage and current
The power supply input voltage measured at the power supply connector pin of the HDDs (receiving
end) must satisfy the requirement given in Subsection 2.1.3. (For other requirements, see Items (4)
and (5) below.)
(2) Current waveform (reference)
Figure 4.6 shows the spin-up current waveform of +5V DC and +12V DC.
+5VDC
MBA3300FD MBA3147FD MBA3073FD
C
u
rrent
(500mA
/di
v)
C
u
rrent
(500mA
/di
v)
C
u
rrent
(500mA
/di
v)
Time (2 sec/div) Time (2 sec/div) Time (2 sec/div)
+12VDC
MBA3300FD MBA3147FD MBA3073FD
C
u
rrent
(500mA
/di
v)
C
u
rrent
(500mA
/di
v)
C
u
rrent
(500mA
/di
v)
Time (2 sec/div) Time (2 sec/div) Time (2 sec/div)
Figure 4.6 Current waveform (Spin-up)
48 C141-E264