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參數(shù)資料
| 型號(hào)： | BD7905BFS |
| 廠商： | Rohm CO.,LTD. |
| 英文描述： | 6CH Power Driver for CD-ROM, DVD-ROM |
| 中文描述： | 6路功率驅(qū)動(dòng)器為CD - ROM，DVD - ROM光碟 |
| 文件頁數(shù)： | 14/18頁 |
| 文件大?。?/td> | 202K |
| 代理商： | BD7905BFS |
BD7905BFS
Optical disc ICs
3. Hall inputs (pin 1 to 6) and Hall bias (pin 7) (Spindle)
Hall elements can be connected either in series or in parallel. Set the Hall input voltage to 1.0 to 4.0V and larger than
100mV
PP
.
14/17
HU
HV
HW
V
CC
7pin
V
CC
7pin
HU
HV
HW
Parallel connection
Series connection
4. Torque command (spindle: pin 24, sled motor: pin 28 and 29) / output current detection terminals (spindle: pin 20, sled
motor: pin 31 and 32)
The relation between the torque command input and the output current detection terminals input is expressed as
shown below:
VC
SPIN
SLIN1, 2
SPRNF
SLRNF
FWD rotation
Dead zone
+
Dead zone
The input-output gain (gm) and the output-limit current (ILIM) depend on the resistance of RNF (output current
detection resistor). Please refer to the following expression.
The gain to drive the spindle or the sled motor can be decreased by connecting a resistor in series to each input
terminal.
Spindle (CTL1
=
"H")
Sled
0.33/RNF (Arms/V)
0.33/RNF (A)
0.33
×
112.5k
/
{
SPRNF
×
(Rin
+
112.5k)
}
(Arms/V)
53.9
×
112.5k
/
{
SPRNF
×
(Rin
+
112.5k)
}
(mArms/V)
Spindle (CTL1
=
"L")
53.9/RNF (mArms/V)
96.8/RNF (mA)
0.65/RNF (A/V)
0.5/RNF (A)
0.65
×
47k/
{
SLRNF
×
(Rin
+
47k)
}
(A/V)
Input-output gain
Output-limit current
Gain with the added resistor
Gain expression
Rin : added series resistor
5. PWM oscillation frequency
The PWM oscillation for driving the spindle and sled is free running. The oscillating frequency is 100kHz (typ.).
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| BD7905BFS-E2 | 制造商:ROHM Semiconductor 功能描述:6CH POWER DRIVER FOR CD-ROM, DVD-ROM - Tape and Reel 制造商:ROHM Semiconductor 功能描述:IC PWR DRIVER 6CH DISC 54-HSSOP 制造商:ROHM Semiconductor 功能描述:CD-ROM DVD-ROM POWER DRIVER 6CH |
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| BD791 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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