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參數(shù)資料
| 型號： | AN6657 |
| 廠商： | PANASONIC CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | Micromotor Forward/ Reverse Electronic Governors |
| 中文描述： | BRUSH DC MOTOR CONTROLLER, 0.7 A, PDIP16 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-16 |
| 文件頁數(shù)： | 5/6頁 |
| 文件大?。?/td> | 71K |
| 代理商： | AN6657 |
ICs for Motor
AN6657, AN6657S
As it is clear from the expression (4), r
1
r
2
/r
3
– Ra = 0, that is,
when r
1
= r
3
/r
2
÷
Ra is established, Ea (
∝
motor speed N)
becomes a constant value without depending on the motor
current Ia (load torque T). This is also true for the expression
(5).
Switching the Various Modes
The AN6657 and the AN6657S have five motor drive
modes as shown in Table 1. Those modes can be selected
depending on the voltage H (3V to 6V) and voltage L (0V to
0.7V) signals applied to the input pins14, 15 and 16.
1) Forward/reverse switching : Forward/reverse rotation is
switched over whether a current flows from the pin5 to
the pin8 (forward rotation) or vice versa (reverse
rotation).
2) Power-off (pause) mode : turning off the constant current
source inside the IC stops a current to the motor and stops
motor. In this mode, all the transistors of the IC are turned
off and only a leak current (20
μ
A) is available.
3) Setting the motor speed
The motor speed at constant speed time can be expressed
by the expression (4).
In the FF (REW) mode, the pin2 is turned on and the first
term of the expression (4) is ;
+ V
CE SAT
and the motor speed N (motor generated voltage Ea) is
expressed as follows.
From the expression (4), the motor speed at constant speed
can be controlled with r
4
and r
5
(external VRs).
From the expression (6), the motor speed at the FF (REW)
mode can be controlled with r
6
.
<
≈
The torque control resistance r
1
is important in setting the
motor rotating state. Select the resistance which satisfies the
condition of the expression (7) within a working temperature
range. If this condition is not satisfied, the motor may have
abnormal rotation such as hunting, etc.
r
1
r
2
Ra
(r
3
/r
2
= 1/10 for the AN6657, AN6657S)
Ra is the copper coiled resistor of the motor and has the
temperature characteristics of + 3,900r.p.m/C, Therefore, it
is necessary to set the value of r
1
so that the relationship in
the expression (7) will be satisfied at the minimum working
temperature. The diffusion resistance r
3
/r
2
in the IC has the
flat temperature characteristics, and if the temperature
characteristics of r
1
is adjusted to that of Ra, + 3900 r.p.m/C,
the value of the second term (r
1
r
2
r – Ra) of the expressions
(4) and (5) shows the flat temperature characteristics and the
torque characteristics of the motor speed becomes constant
without depending on a temperature. Fig. 2 and Fig. 3 show
this relationship.
Setting the External Resistor r
1
r
3
(7)
L
H
H
H
H
—
H
L
H
L
—
L
H
H
—
H
L
H
L
—
L
H
L
H
OFF
OFF
OFF
ON
ON
Pin14
Pin15
Pin16
Pin2
Pin5
Motor +
Pin8
Motor
–
Input
Output
Motor Drive Mode
Power OFF (pause)
Forward (constant speed)
Reverse (constant speed)
FF
REW
Table 1 AN6657/AN6657S Mode Switching Table
V
REF
r
2
+r
3
r
3
·
r
5
r
4
· r
6
r
4
+r
6
+ r
5
(6)
Ea =V
REF
·
r
5
r
5
+
r
1
r
2
r
3
– Ra Ia
Low Temperature
Normal Temperature
High Temperature
T
M
(Torque)
Fig. 2 r
1
Temperature Characteristics < Ra Tempera-
ture Characteristics
N
r
2
+r
3
r
3
r
4
· r
6
r
4
+r
6
+
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AN6657S | Micromotor Forward/ Reverse Electronic Governors |
| AN6663S | Bridge Drivers |
| AN6663SP | Bridge Drivers |
| AN6701 | Switch Mode Power Supply; Output Power:1512W; No. of Outputs:1; Output 1 VDC :360VDC; Output Current 1:4.2A; Power Supply Mounting:PC Board; Leaded Process Compatible:Yes; Output Current:4.2A; Output Power Max:1512W RoHS Compliant: Yes |
| AN6701S | Temperature Sensor IC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AN6657/AN6657S | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:AN6657. AN6657S - Micromotor Forward/ Reverse Electronic Governors |
| AN6657S | 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:Micromotor Forward/ Reverse Electronic Governors |
| AN6658K | 制造商:Panasonic Industrial Company 功能描述:IC |
| AN666 | 制造商:SILABS 制造商全稱:SILABS 功能描述:USAGE GUIDE FOR SIM3U1XX, SIM3C1XX, AND SIM3L1XX DMA AND DTM MODULES |
| AN6660 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DC Motor Controller/Driver |
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