Dc Power Interface; Dc Power Requirement - Hitachi Ultrastar SCSI Interface HUS103014FL3600 Oem Manual

4

DC power Interface

4.1 DC Power Requirement

The drives are operated on DC power (+5V, +12V) only.
No power sequencing is required.
The +5 and +12 Volts can be applied in any order.
Power supply
+5V DC
+12V DC
Note 1. Voltage tolerance is measured at the DC power connector on the PCB.
The ripple current occurs during the motor start-up and seek.
Appropriate size of the DC Power cable is recommended to reduce the above
ripple and noise.
Note 2. In case of fluctuations in the DC power (spikes, momentary shut off, etc.),
the data being recorded or to be recorded from buffer memory are not
assured.
Table 4.1 DC Power Requirement
Voltage tolerance
5.0V +/-5%
12.0V +/-5%
Allowed ripple and noise
Less than 150mVp-p (0 - 100kHz)
Less than 100mVp-p (100kHz - 10MHz)
Less than 150mVp-p (0 - 100kHz)
Less than 100mVp-p (100kHz - 10MHz)
Drawing No. Sheet No. Revision
K6610091 15/43 2005/2/23