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參數(shù)資料
| 型號(hào)： | TDA5149 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 12 V Voice Coil Motor VCM driver and spindle motor pre-driver combination chip |
| 中文描述： | 12伏氯乙烯音圈電機(jī)驅(qū)動(dòng)器和主軸電機(jī)預(yù)驅(qū)動(dòng)芯片組合 |
| 文件頁數(shù)： | 13/28頁 |
| 文件大小： | 148K |
| 代理商： | TDA5149 |
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1996 May 06
13
Philips Semiconductors
Product specification
12 V Voice Coil Motor (VCM) driver and
spindle motor pre-driver combination chip
TDA5149G
Table 9
REG # 4: address 101; | WATCHDOG_REG[4 to 0] |
Table 10
REG # 6: address 110; | not used | not used | COMDELIM_REG[2 to 0] |
Table 11
Commutation delay limit
Note
1.
Even COMDELIM _REG values must be avoided.
Table 12
REG # 7: address 111; | BLANK_REG[4 to 0] |
DATA BIT
RESET
STATE
DESCRIPTION
WATCHDOG_4
WATCHDOG_3
WATCHDOG_2
WATCHDOG_1
WATCHDOG_0
0
0
0
0
0
The watchdog timer checks for correct back EMF polarity, which indicates correct
rotation of the motor
WATCHDOG delay
0 to 31
{
}
64
×
(
[
=
DATA BIT
RESET
STATE
DESCRIPTION
COMDELIM_2
COMDELIM_1
COMDELIM_0
0
0
0
Defines the maximum commutation delay limit by setting the saturation value of the
zero crossing counter. t
IC
represents the period of the internal clock. Table 11
shows the delays which can be obtained.
COMDELIM_REG
COUNTER SATURATION VALUE
MAXIMUM COMMUTATION DELAY
t
IC
×
1023
t
IC
×
767
t
IC
×
511
t
IC
×
383
t
IC
×
255
t
IC
×
191
t
IC
×
127
t
IC
×
95
111
2047
1535
1023
767
511
383
255
191
110; note 1
101
100; note 1
011
010; note 1
001
000; note 1
DATA BIT
RESET
STATE
DESCRIPTION
BLANK_4
BLANK_3
BLANK_2
BLANK_1
BLANK_0
0
0
0
0
0
In the hard switching mode, the blank delay inhibits the back EMF comparator
outputs just at the moment the MOT outputs are commutating, until they have been
stabilized again. To avoid false zero-crossing detection, the blank delay operates in
the same way at the end of the fly-back pulse (hard-switching mode), or at the end
of the soft-switching interval (soft-switching mode).
BLANK delay
0 to 31
{
}
4
×
(
)
1
+
[
]
×
=
)
1
+
]
t
IC
×
t
IC
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