Power; Power Sequencing; Power Reset Limits; Table 4-4 Power Reset Limits - Quantum FIREBALL PLUS AS 10.2 Product Manual

4.5 4.5 4.5 4.5

POWER

POWER POWER POWER
The Quantum Fireball Plus AS 10.2/20.5/30.0/40.0/60.0 GB AT hard disk drives
operate from two supply voltages:
• +12V ±10%
• +5V ±5%
The allowable ripple and noise is 250 mV peak-to-peak for the +12 Volt supply and
150 mV peak-to-peak for the +5 Volt supply.
4.5.1 4.5.1

Power Sequencing

Power Sequencing
4.5.1 4.5.1 Power Sequencing Power Sequencing
You may apply the power in any order, or open either the power or power return
line with no loss of data or damage to the disk drive. However, data may be lost in
the sector being written at the time of power loss. The drive can withstand transient
voltages of +10% to –100% from nominal while powering up or down.
4.5.2 4.5.2 4.5.2 4.5.2

Power Reset Limits

Power Reset Limits Power Reset Limits Power Reset Limits
When powering up, the drive remains reset (inactive) until both rising voltage
thresholds reset limits are exceeded for
becomes reset when either supply voltage drops below the falling voltage threshold
³ m
for 1 ms.
DC VOLTAGE DC VOLTAGE DC VOLTAGE DC VOLTAGE
+5 V
+12 V
Table 4-4

Table 4-4 Power Reset Limits

Table 4-4 Table 4-4
THRESHOLD THRESHOLD THRESHOLD THRESHOLD
V =
Threshold
4.4V minimum
4.6V maximum
V =
Threshold
8.7V minimum
9.3V maximum
Quantum Fireball Plus AS 10.2/20.5/30.0/40.0/60.0 GB AT
³
30 ms. When powering down, the drive
HYSTERESIS HYSTERESIS HYSTERESIS HYSTERESIS
70 mV (typical)
200 mV (typical)
Specifications
4-5