Hitachi 7K100 Hard Drive Specifications - Page 38

DC power requirements

Page 38 highlights

6.2 DC power requirements Connection to the product should be made in a safety extra low voltage (SELV) circuits. The voltage specifications are applied at the power connector of the drive. Table 15: DC power requirements Item Nominal supply Supply voltage Power supply ripple (0-20 MHz) 1 Tolerance2 Supply rise time Requirements +5Volt DC -0.3 Volt to 6.0 Volt 100mV p-p max. ±5% 7-100 ms Watts (RMS typical) Performance Idle average3 1.8 Active Idle average 1.1 Low Power Idle average 0.85 Read average 4 2.0 Write average 2.0 Seek average 5 2.3 Standby 0.20 Sleep 0.1 Startup (max. peak) 6 5.5 Average from power on to ready 3.8 Footnotes: 1 The maximum fixed disk ripple is measured at the 5 volt input of the drive. 2 The disk drive shall not incur damage for an over voltage condition of +25% (maximum duration of 20 ms) on the 5 volt nominal supply. 3 The idle current is specified at an inner track. 4 The read/write current is specified based on three operations of 63 sector read/write per 100 ms. 5 The seek average current is specified based on three operations per 100 ms. 6 The worst case operating current includes motor surge. 6.2.1 Power consumption efficiency Table 16: Power consumption efficiency Capacity Power Consumption Efficiency (Watts/GB) 100 GB 0.0085 80 GB 60 GB 0.0106 0.0142 Note: Power consumption efficiency is calculated as Power Consumption of Low Power Idle in Watts/Capacity (GB). Travelstar 7K100 Hard Disk Drive Specification 24

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
  • 201
  • 202
  • 203
  • 204
  • 205
  • 206
  • 207
  • 208
  • 209
  • 210
  • 211
  • 212
  • 213
  • 214
  • 215
  • 216
  • 217
  • 218
  • 219
  • 220
  • 221
  • 222
  • 223
  • 224
  • 225

Travelstar 7K100 Hard Disk Drive Specification
24
6.2
DC power requirements
Connection to the product should be made in a safety extra low voltage (SELV) circuits. The voltage specifications
are applied at the power connector of the drive.
Footnotes:
1
The maximum fixed disk ripple is measured at the 5 volt input of the drive.
2
The disk drive shall not incur damage for an over voltage condition of +25% (maximum duration of
20 ms) on the 5 volt nominal supply.
3
The idle current is specified at an inner track.
4
The read/write current is specified based on three operations of 63 sector read/write per 100 ms.
5
The seek average current is specified based on three operations per 100 ms.
6
The worst case operating current includes motor surge.
6.2.1
Power consumption efficiency
Note:
Power consumption efficiency is calculated as Power Consumption of Low Power Idle in Watts/Capacity
(GB).
Table 15: DC power requirements
Item
Requirements
Nominal supply
+5Volt DC
Supply voltage
–0.3 Volt to 6.0 Volt
Power supply ripple (0–20 MHz)
1
100mV p-p max.
Tolerance
2
±5%
Supply rise time
7–100 ms
Watts (RMS typical)
Performance Idle average
3
1.8
Active Idle average
1.1
Low Power Idle average
0.85
Read average
4
2.0
Write average
2.0
Seek average
5
2.3
Standby
0.20
Sleep
0.1
Startup (max. peak)
6
5.5
Average from power on to ready
3.8
Table 16: Power consumption efficiency
Capacity
100 GB
80 GB
60 GB
Power Consumption
Efficiency (Watts/GB)
0.0085
0.0106
0.0142