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參數(shù)資料
| 型號(hào)： | FAN8039BD3TF |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 光電元器件 |
| 英文描述： | MOTOR CONTROLLER |
| 中文描述： | 5 CHANNEL CD MOTOR DRIVER, PDSO30 |
| 封裝： | 0.375 INCH, SSOPH-28 |
| 文件頁數(shù)： | 9/16頁 |
| 文件大小： | 291K |
| 代理商： | FAN8039BD3TF |
5-CH MOTOR DRIVER
9
2. Thermal Shutdown
The TSD circuit turns activated when the junction temperature becomes
over 175
°
C.
It cuts off the bias current on the output driver and keeps all the output
drivers off. Meanwhile, the junction temperature begins to decrease.
The TSD circuit can be deactivated when the unction temperature falls
under 150
°
C, so the output driver begins operating in normal condition
The TSD circuit has the hysteresis temperature of 25
°
C
.
3. Power Save Function
When the pin22 is high, the TR Q3 is turned on and Q4 is off, so the bias
circuit is enabled. On the other hand, when the pin22 is Low (GND) ,
the TR Q3 is turned off and Q4 is on, so the bias circuit is disabled.
that is, it will make all the circuit blocks except for variable regulator off,
so low power quiescent state can be established.
Truth table is as follows.
4. Variable Regulator
A 33uF capacitor is used as a ripple eliminator in the external cir-
cuit. Therefore, output voltage, Vout can be calculated as follows.
In order to reduce the heating problem on regulator output
TR,Q1, a resistor R3 can be used and calculated as follows
.
Pin#22
High
Low
FAN8039BD3
Power Save Off
Power Save On
VCC
R2
R3
Q0
Output driver
bias
Hysteresis
R1
Ihys
I
REF
22
Q3
Main Bias
(except for
variable reg.)
VCC
Q4
REGVCC
V
REF
2.5V
V
OUT
R1
R2
33uF
5
6
4
7
RESX
R3
Q1
I
MAX
V
OUT
V
REF
1
R
1
R
2
------
+
2.5
2
×
5V R1
R2
=
)
=
=
=
R3
------------------------------–
)
(
)
IMAX
=
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| FAN8042 | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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