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參數資料
| 型號： | FAN8732CG |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 光電元器件 |
| 英文描述： | Spindle motor and 5-CH actuator driver [Spindle(PWM), Sled 2-CH(PWM) 3-CH(Linear)] |
| 中文描述： | CD MOTOR DRIVER, PDSO42 |
| 封裝： | SSOP-42 |
| 文件頁數： | 13/20頁 |
| 文件大小： | 322K |
| 代理商： | FAN8732CG |
FAN8732G/FAN8732BG/FAN8732CG
13
2. Torque Control & Output Current Control Of Sled Motor(2-phase Step Motor)
1) By amplifying the voltage difference between V
REF
and IN4(or IN5) from Servo IC(or DSP), the Torque AMP produces
the input voltage(V
AMP
) which is input current command.
2) The output current (I
O
) is converted into the voltage (V
CS
) through the sense resistor (R
CS
) and compared with the V
AMP
.
3) The clock generator has the RS latch set periodically, this makes output driver on state and when the V
CS
and the V
AMP
is
equal the state becomes off.
4) By the negative feedback loop, the sensed output voltage V
CS
equals to the V
AMP
.
5) To avoid output upper and lower transistor’s short through, switch trick is needed. Turn on delay time is 1usec, turn off
delay time is 2usec and the phase delay time, when the current direction is changed, is 3usec.
6) The gain and limit current are calculated as below table.(Gvo=1[V/V])
8) The range of the torque voltage is as shown below when Rcs=0.5
,
R
EXT1
=0 and R
EXT2
=inf.
Torque limit current
Input/Output gain[A/V]
Remark
is gain scaler
+-
Torque AMP
V
REF
IN4(or IN5)
Driver
M
Rcs
Vcs
+
-
Io
PVCC3
V
AMP
+
-
LPF
R
S
Q
Clock
Generator
R
EXT1
R
EXT2
Drive Logic
Inside IC
I
OMAX
4
----------
REXT2
---------------------+
-------------
REXT2
---------------------+
Forward
Dead
zone+
Dead
zone-
Reverse
Current
[A]
0
IN4/IN5-V
REF
I
limit
40mV
-40mV
G
IO
=G
VO
/ R
CS
相關PDF資料 |
PDF描述 |
|---|---|
| FAN8732CGX | Spindle motor and 5-CH actuator driver [Spindle(PWM), Sled 2-CH(PWM) 3-CH(Linear)] |
| FAN8732G | Spindle motor and 5-CH actuator driver [Spindle(PWM), Sled 2-CH(PWM) 3-CH(Linear)] |
| FAN8732GX | Spindle motor and 5-CH actuator driver [Spindle(PWM), Sled 2-CH(PWM) 3-CH(Linear)] |
| FAN8741 | Spindle Motor and 6-CH Driver |
| FAN8741G | Spindle Motor and 6-CH Driver |
相關代理商/技術參數 |
參數描述 |
|---|---|
| FAN8732CGX | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Spindle motor and 5-CH actuator driver [Spindle(PWM), Sled 2-CH(PWM) 3-CH(Linear)] |
| FAN8732G | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Spindle motor and 5-CH actuator driver [Spindle(PWM), Sled 2-CH(PWM) 3-CH(Linear)] |
| FAN8732GX | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Spindle motor and 5-CH actuator driver [Spindle(PWM), Sled 2-CH(PWM) 3-CH(Linear)] |
| FAN8741 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Spindle Motor and 6-CH Driver |
| FAN8741G | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Spindle Motor and 6-CH Driver |
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