M54687FP [RENESAS]
Bi-Directional Motor Driver with Governor; 与州长双向电机驱动器
| 型号： | M54687FP |
| 厂家： | 
RENESAS TECHNOLOGY CORP |
| 描述： | Bi-Directional Motor Driver with Governor |
| 文件： | 总9页 (文件大小：197K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
M54687FP
Bi-Directional Motor Driver with Governor
REJ03F0048-0100Z
Rev.1.0
Sep.19.2003
Description
The M54687FP is a semiconductor integrated circuit that is capable of directly controlling the rotating direction and
rotating speed of a smallsize bi-directional motor rotating in both forward and reverse directions.
Features
•
•
•
•
•
Capable of controlling the spen forward and reverse rotating directions
Capable of controlling the gh speed mode
Large output current dr0mA)
Built-in clamp diode
Flat package (16
Application
Micro-cassette for phone-answand other general consumption appliances
Function
The M54687FP is an IC that can control ttation and speed of small DC brush motor.
For the basic operation of this IC, output modlogic truth table, by entering appropriate
H/L level into the R, L and S inputs.
Two resistances are put between the output pin and thtios are appropriately adjusted to
perform the speed control.
In addition to the above, speed control can be done by varyingh speed mode.
Pin Configuration
PSC1
P-V
Speed control 1
R input
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
R
S
O1
S input
V
R
High
control
GND
GND
L input
L
NC
Power supply L-VCC
Speed control 2 PSC2
O
2
Output 2
P-VCC Power supply
Outline 16P2N-A
NC: no connection
Rev.1.0, Sep.19.2003, page 1 of 8
M54687FP
Logic Truth Table
Input
Output
O1
H
R
H
H
L
L
H
L
S
H
H
H
H
L
O2
FG
G
Mode
FF
Forward rotation high speed governor
Forward rotation governor
Reverse rotation high speed governor
Reverse rotation governor
Brake operation
H
PLAY
REW
REV
H
L
FG
G
H
L
H
H
L
H
L
L
L
BRAKE
STB
L
OFF
OFF
Standby mode output high imp.
Reserved
H
L
L
L
H
L
G: Governor control output mode
FG: Rotating speed controllable with the voltage at VR pin (However, the precision is worse than G.)
Block Diagram
Output 1 Output 2
Speed contro
PSC1
Speed control 2
PSC2
Power supply
V
CC
O
1
O2
15
10
9
7 16
8
1
High Speed
control
V
R
14
( – )
( – )
Control circuit
13
4
5 12
GND
2
R
6
L
3
S
R input
L input
S input
Rev.1.0, Sep.19.2003, page 2 of 8
M54687FP
Absolute Maximum Ratings
(Ta = 25°C unless otherwise noted.)
Parameter
Symbol Ratings
Unit
V
Condition
Power supply
VCC
VI
–0.5 – +14
–0.5 – VCC
–0.5 – VCC+2
±700
Input voltage
V
Output voltage
VO
IOP
IO
V
Allowable motor rush current
Continuous output current
Power dissipation
Operating temperature
Storage temperature
mA
mA
W
tON ≤ 100ms, duty of 1% or less.
±200
However, Pd must not exceed the maximum rating.
When mounted in board
Pd
1.14
Topr
Tstg
-20 – 75
-40 – 125
°C
°C
Thermal Derating (Absolute Maximum Rating)
2.0
When mounted in board
100
Recommended Operational Conditions
unless otherwise noted.)
Limits
Parameter
Symbol
Vcc
Min.
6.0
2.0
0
Typ.
Unit
V
Supply voltage
9.0
“H” input voltage
“L” input voltage
VR control voltage range*
VIH
V
VIL
V
VR
0
Vc
V
* : IO ≤ 200mA when FF/REW speed is controlled.
Rev.1.0, Sep.19.2003, page 3 of 8
M54687FP
Electrical characteristics
(Ta = 25°C, unless otherwise noted.)
Limits
Unit
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
V
CC = 14V, V
O = 14V
I
O(leak)
I
Output leak current
µA
100
0
Standby mode
0
0.4
1.0
I
Input current
mA
V
V
I
= 5.0V
V
OH
“H” output voltage
–
I
O
= -200mA, V
R
= 5.0V
V
CC-1.2
V
CC-0.9
IO = 200mA, VR = 0V, Vpsc = 2.5V
FF / REW / BRAKE mode
VOL
“L” output voltage
–
0.22
0.5
V
I
I
I
I
CC1
CC2
CC3
CC4
FF/REW
–
–
5.0
5.0
35
0
8.0
8.0
48
Output open
Output open
Output open
mA
mA
mA
µA
V
PLAY/REV
Supply
current
–
BRAKE
–
10.0
1.05
1.7
22
STAND BY
0.95
0.7
18
V
ref
Reference voltage
1.0
1.2
20
I
B
Bias current
mA
–
K
Current proponal constant
I
O
= 40mA
CC = 6.0 – 13V
CC = 6.0 – 13V
V
ref / VCC
%/V
%/V
V
0.1
0.2
Vref
Voltage
char
K
K
V
/ VCC
IO
= 40mA
V
ref / I
O
I
O
= 50 – 200mA
0.02
%/mA
%/mA
%/˚C
%/˚C
Vref
ch
K
K
0 – 200mA
5˚C
/ I
O
0.01
0.01
V
ref / T
a
Temperatur
characteristics
Vref
K
K
/ Ta
0.01
2.0
V
ref II
V
V
ref / VCC
Voltage
characteristics
%/V
3.0
Vref
V
ref / I
O
Current
characteristics
%/mA
0.2
Vref
ref / T
a
V
V
R
=
Temperature
characteristics
%/˚C
0.1
T
a
Vref
mA
Bias current
input current
7
1.3
1.8
-20
I
I
B
R
V
R
R
= 0.3
= 0V
V
R
µA
V
-5.0
Rev.1.0, Sep.19.2003, page 4 of 8
M54687FP
Application Example
When the normal speed is set to 2000rpm, and the high speed is set to 3500rpm
2k
RS
V
CC = 9.0V
0.1µF
RT
RT
300 / / 5.6 k
V
CC = 5.0V
10µF
M
PSC1
O
1
O2
PSC2
V
CC
20k
V
R
1k
vation circuit
( – )
R
L
P-G
L-G
n close to the IC, if possible.
Control sign
2.57
Generation constant Ka =
Motor: Armature resistance R
a
= 14
,
3000
RT: The resistance of 300 is used for temperature compensation to take measures aga
Rev.1.0, Sep.19.2003, page 5 of 8
M54687FP
Speed Control Method
(1) Speed Control Method I (See the application circuit drawing.)
For PLAY/REV
Rotation number can be expressed by the following formula:
1
Ka
RT
RT+RS
RT
K
N=
{IB • RT+Vref(1+
)+la(
-Ra)}• • • • • • (1)
Where:
Motor generation constant: Ka, Motor armature resistance: Ra, Rotation number: N
K: Current proportional constant, IB: PSC pin bias current,
Ia:motor current
RT, RS: External resistance
In addition, to set the rotation number with RS, external resistance RT is generally set as follows:
RT ≤ K × Ra
For FF/REW
Note that the rotation controlled with the same expression as formula (1) but different reference
voltage
Vref and differen.
However, Vref 5V
(2) Speed Control Method n number)
PSC1
R
O
L
1
S
Control signal
In the external circuit above, the voltage across motors is almost determined by of ‘RS+RT’ to ‘RT’ and,
therefore, a value set for the voltage across motors is not so large.
As method (1) of speed control I, the rotation number can be controlled.
However, the following relations must be satisfied:
RT→RT+RS
RS+RT→RT
Rev.1.0, Sep.19.2003, page 6 of 8
M54687FP
(3) Speed Control Method III (to increase the precision of forward rotation and reverse rotation)
RS1
RT1
RT2
RS2
M
PSC1
R
O1
L
O2
PSC2
VR
VCC
P-G
S
L-G
rol signal
The above two applicments in forward rotation and reverse rotation (because the external
resistance is shared with se rotation).
Fine adjustments can be madnd reverse rotation if the external circuit is set as shown in
the drawing above.
This external circuit is also available d and reverse rotation.
The control method adopts the same form
However, the following relations must be sati
RT+RS→RS1 or RS2
RT→RT1 or RT2
CAUTIONS
(1) Oscillation may take place with the setting of RT>K•Ra. Set
R ≤ K•Ra.
(2) Add a capacitor of 0.1µF to the portion between PSCs to reduce bru
(3) Add a capacitor of 10µF to the portion between VCC and GND to reduce k electromotive noise of
the motor.
(4) At a low temperature, RT>K•Ra is set due to temperature characteristics of ree Ra of the motor. When
oscillation takes place, use resistance with a temperature coefficient for RT.
(5) When the supply voltage is low, note that saturation of the output transistor of the IC may prevent the rotating speed
for control. Taking into account motor noise etc., set constants in the following range.
2.0V
V
CC - (EC+Ia
• Ra)
RT
K
RT
RS
= VCC - {RT IB + Vref(1+
•
)+
• Ia}
When the back electromotive force is large with the brakes applied, for example, malfunction may occur in internal
parasitic Di. If flyback current of 1A or more flows, add Schottky Di to the portion between the output and the GND.
When the IC is used at a high speed for PWM etc., note that switching of output results in delay of approx. 10µs.
Rev.1.0, Sep.19.2003, page 7 of 8
M54687FP
Package Dimensions
2 I
1 e
L
1 L
E
E H
Rev.1.0, Sep.19.2003, page 8 of 8
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