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AN8267S PDF预览

AN8267S

更新时间: 2024-01-08 18:45:14
品牌 Logo 应用领域
松下 - PANASONIC 驱动器运动控制电子器件风扇信号电路光电二极管电动机控制电机
页数 文件大小 规格书
5页 55K
描述
Fan Motor Driver

AN8267S 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
零件包装代码:SOIC包装说明:SOP, SOP16,.3
针数:16Reach Compliance Code:unknown
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.92模拟集成电路 - 其他类型:BRUSH DC MOTOR CONTROLLER
JESD-30 代码:R-PDSO-G16JESD-609代码:e0
长度:10.09 mm功能数量:1
端子数量:16最高工作温度:80 °C
最低工作温度:-30 °C最大输出电流:1.5 A
封装主体材料:PLASTIC/EPOXY封装代码:SOP
封装等效代码:SOP16,.3封装形状:RECTANGULAR
封装形式:SMALL OUTLINE峰值回流温度(摄氏度):NOT SPECIFIED
电源:10/28 V认证状态:Not Qualified
座面最大高度:2.45 mm子类别:Motion Control Electronics
最大供电电流 (Isup):17 mA最大供电电压 (Vsup):27.6 V
最小供电电压 (Vsup):9.6 V标称供电电压 (Vsup):12 V
表面贴装:YES技术:BIPOLAR
温度等级:COMMERCIAL EXTENDED端子面层:Tin/Lead (Sn/Pb)
端子形式:GULL WING端子节距:1.27 mm
端子位置:DUAL处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:5.5 mmBase Number Matches:1

AN8267S 数据手册

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Supplementary Explanation (Cont.)  
2. Occurrence of radio noises  
When the lock protective function is being activated, coil  
current supply/stop intervals are about 1 : 7 in terms of time  
ratio.  
When driving the motor with the AN8267S, radio noises  
(noises which come out of the radio when the motor is driven  
near it) may occur.  
Assuming the external capacitor of the Pin4 to be of 1µF,  
the supply/stop time ratio is about 0.3sec. : 2sec.  
Lock Protective Function ON/OFF Time Calculation Expres-  
sion  
The radio noises are more likely to occur as the counter  
electromotive power of the coil output pin rises more steeply.  
So, they can be eliminated by attaching the external part men-  
tioned in 1-2) above.  
Reference Voltage 1 (V1)  
Reference Voltage 2 (V2)  
toff  
ton  
Steep Rise  
Gentle Rise  
Fig.6  
Assuming the charging current to be Ich and the discharging  
Fig.4  
3. AN8267S lock protection  
current to be IDC  
At charge time ;  
;
When the motor fan is locked, the AN8267S has a function  
to protect the motor and IC. (lock protection operational prin-  
ciple)  
1
I ch · ton  
C
V1 –V2 =  
t on=  
I ch dt =  
C
If the motor fan is locked, a sine wave signal is not input  
from the Hall element any more and the potential of the Pin4  
external capacitor increases. (Fig.5a)  
(V1–V2)  
I ch  
· C  
During this period, the IC is still supplying the coil current  
to rotate the motor fan. Then, if the voltage at the Pin4 reach-  
es the reference voltage 1 set inside the IC, the electric charge  
in the external capacitor of the Pin4 is discharged constantly,  
thus reducing the voltage at the Pin4. (Fig.5b)  
At discharge time  
1
V1–V2 =  
C
I ch · toff  
C
IDC dt =  
(V1–V2)  
IDC  
t off=  
· C  
The IC stops supplying the coil current when this constant  
current discharge starts. If the voltage at the Pin4 reaches the  
reference voltage 2, the IC starts charging a constant current  
to the external capacitor of the Pin4 and supplies the coil cur-  
rent again, thus repeating the above-mentioned operation.  
Each value (typ.) of the AN8267S is ;  
V1=4V  
V2=0.95V  
Ich=9.5µA  
IDC=1.3µA  
When C=1µF ;  
ton=0.32s  
C : External capacitor's capacity  
toff=2.35s  
Reference Voltage 1  
4. Rotation output Pins2 and3  
The Pins2 and 3 are of open collector output. The Pin2 is a  
pulse output pin synchronized with a signal from the Hall ele-  
ment. Therefore, the Pin2 is switched over depending on the  
polarities of the Hall input Pins1 and 16.  
Reference Voltage 2  
a
b
Fig.5  
1
L
H
16  
H
L
2
H
L
The external capacitor of the Pin4 is always kept in the dis-  
charge state by a signal from the Hall element at the time of  
stationary rotation.  
Polarities of Pins2, 1, and 16  

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