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參數(shù)資料
| 型號： | L7203S |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | SMOOTH DRIVE SPINDLE MOTOR FOR OPTICAL DRIVE APPLICATION WITH POWER INTEGRATED |
| 中文描述： | 傳動平穩(wěn)主軸馬達驅(qū)動功率集成應(yīng)用光學(xué) |
| 文件頁數(shù)： | 10/13頁 |
| 文件大小： | 170K |
| 代理商： | L7203S |
PHS on = tsys * 4 * Nphase
where: tsys = 50ns if fsys = 20MHz
The resulting PHASE SHIFT value is:
PHASE SHIFT = Nphase(8:3) x 10 +
Nphase(2:0) x 1.25
For istance if Nphase = 00011 110
PHASE SHIFT = 3 x 10 + 6 x 1.25 = 37.5
Low Voltage Detector
This circuit detects if V
CC
is lower than a fixed
threshold. If this event happens the internal logic
is resetted and the output FETS are forced in
High impedance.
Slew Rate Control Circuit
This circuit fixes the slew rate for the output stage
in order to reduce EMI.
A reference current is generated by means of an
internal reference voltage and an external resis-
tor.
The I
SRC
is used to fix slew rate with a linear law:
SLEW RATE = R
SLR/ISRC
V
REF
R
EXT
R
ext
recommended value >10K
Prescaler Pin
The PRS Pin should be forced to ground when
the FSYS frequency is lower (or equal) than
20MHz and should be forced to V
CC
when FSYS
frequency is higher than 20MHz, in order to set
the correct timing during the inductive sense,
start up and resynchronization phases.
Example of different phase shift settings are
shown in the following pictures.
PHS on
time
μ
s
56.0
56.2
56.4
56.6
56.8
57.0
57.2
57.4
> 57.6
NPhase
Phase Shift (degree)
decimal
280
281
282
283
284
285
286
287
288
bit
100011 000
100011 001
100011 010
100011 011
100011 100
100011 101
100011 110
100011 111
100100 000
350
351.25
352.50
353.75
355.00
356.25
357.50
358.75
0
Table 1. (continued)
V
REF
V
REF
I
SRC
=
SRC
R
ext
/
R
ext
+
-
Figure 12.
Hall sensor
OUT V
OUT U
OUT W
Figure 13.
Phase relation between OUTPUT
sinusoidal voltage (PWM_IN > 50%)
and Hall sensor signal writin Phase
shift = 0° (default value)
Hall sensor
OUT V
OUT U
OUT W
30°
Figure 14.
Phase relation between OUTPUT
sinusoidal voltage (PWM_IN > 50%)
and Hall sensor signal writing Phase
shift = 30°
Hall sensor
30°
OUT V
OUT U
OUT W
Figure 15.
Phase relation between OUTPUT
sinusoidal voltage (PWM_IN > 50%)
and Hall sensor signal writing
Phase
shift = 330°
L7203
10/13
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L7204 | 功能描述:重負荷電源連接器 PLUG-YC-#2/0-PC RoHS:否 制造商:Hirose Connector 系列:PS2 產(chǎn)品類型:Connectors 位置/觸點數(shù)量: 端接類型:Crimp 觸點材料: 觸點電鍍:Gold 電壓額定值: 電流額定值:300 A 附件類型: |
| L7204A | 制造商:Agilent Technologies 功能描述:L7204A / Switch, SP4T, DC-4 GHz, unterminated, 24VDC (L-SERIES) |
| L7204B | 制造商:Agilent Technologies 功能描述:L7204B / Switch, SP4T, DC-20 GHz, unterminated, 24VDC (L-SERIES) |
| L7204C | 制造商:Agilent Technologies 功能描述:L7204C / Switch, SP4T, DC-26.5 GHz, unterminated, 24VDC (L-SERIES) |
| L7204G1 | 功能描述:重負荷電源連接器 PLUG-YC-#1/0-PC RoHS:否 制造商:Hirose Connector 系列:PS2 產(chǎn)品類型:Connectors 位置/觸點數(shù)量: 端接類型:Crimp 觸點材料: 觸點電鍍:Gold 電壓額定值: 電流額定值:300 A 附件類型: |
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