Hitachi HUS157336EL3800, HUS157373EL3800 specifications DC power Interface, 1 DC Power Requirement

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.

Table 4.1 DC Power Requirement

Power supply	Voltage tolerance	Allowed ripple and noise
+5V DC	5.0V +/-5%	Less than 150mVp-p (0 - 100kHz)
		Less than 100mVp-p (100kHz - 10MHz)
+12V DC	12.0V +/-5%	Less than 150mVp-p (0 - 100kHz)
		Less than 100mVp-p (100kHz - 10MHz)

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.

Drawing No. Sheet No. Revision 5
K6602906	15/46	2003/6/12