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參數(shù)資料
| 型號： | BA6818 |
| 廠商： | Rohm CO.,LTD. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Fan motor driver IC |
| 中文描述： | 風(fēng)扇馬達驅(qū)動IC |
| 文件頁數(shù)： | 6/7頁 |
| 文件大?。?/td> | 97K |
| 代理商： | BA6818 |
722
Motor driver ICs
BA6817F / BA6818FS
Operation notes
(1)
The IC has a built-in thermal shutdown circuit. The is a
temperature difference of 25 C (typical) between the
temperatures at which the circuit is activated and deacti-
vated.
The circuit is activated at the temperature of about 175 C
(typical), so that both output transistors are turned OFF.
Normal operation resumes when the circuit is deacti-
vated.
(2)
Power dissipation
Power consumed in the IC can be calculated from the fol-
lowing equation :
P
C
=P
C
1
P
C
2
P
C
3
P
C
1 is power consumed by the circuit current.
P
C
1=V
CZ
I
CC
P
C
2 is the output stage current consumption.
P
C
2=V
OL
I
O
V
OL
is the LOW level output voltage of output pins 1 and
2, and I
O
is the sink current of pins 1 and 2.
P
C
3 is power consumed by the AL and HO pins.
(The HO-pin is only for BA6818FS)
where
P
C
3=V
ALL
I
AL
V
HOL
I
HO
/ 2
V
ALL
is the AL-pin LOW level voltage,
I
AL
is the AL-pin sink current,
V
HOL
is the HO-pin LOW level voltage,
I
HO
is the HO-pin sink current.
Make sure that your application does not exceed the al-
lowable power dissipation of the IC.
(3)
Hall amplifier input voltage
The R1 and R2 resistances must be set so as to maintain
the Hall amplifier input bias voltage within the range of 0V
to (V
CZ
2V) including the signal amplitude.
The Hall device may be affected by power supply noise
due to the PCB conductor pattern. If you have this prob-
lem, insert a capacitor C1 as shown in Fig. 5.
If the conductor lines from the Hall device output termi-
nals to the Hall inputs of the IC are particularly long, noise
can be picked up and fed into the inputs. If you have this
problem, insert a capacitor C2 as shown in Fig. 5. Note
that the Hall inputs have no hysteresis in this IC.
Hall current is given by :
where RH is the Hall device impedance.
R1
R2
RH
V
CZ
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BA6818FS | 制造商:ROHM 制造商全稱:Rohm 功能描述:2-Phase Half-Wave Pre Driver for Fan Motor |
| BA6819AF | 制造商:ROHM 制造商全稱:Rohm 功能描述:2-phase half-wave motor driver |
| BA681A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LED Display Driver |
| BA682 | 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:Band Switching Diodes |
| BA682_10 | 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:Band Switching Diodes |
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