M54687FP Datasheet, PDF (1/6 Pages) Mitsubishi Electric Semiconductor – Bi-DIRECTIONAL MOTOR DRIVER WITH GOVERNOR

MITSUBISHI <CONTROL / DRIVER IC>
M54687FP
Bi-DIRECTIONAL MOTOR DRIVER WITH GOVERNOR
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
q Capable of controlling the speed in forward and reverse rotating
directions
q Capable of controlling the speed in high speed mode
q Large output current drive (IO(max) =700mA)
q Built-in clamp diode
q Flat package (16P2N )
APPLICATION
Micro-cassette for phone-answering machine, AV equipment, and
other general consumption appliances
FUNCTION
The M54687FP is an IC that can control the forward rotation,
reverse rotation and speed of small DC brush motor.
For the basic operation of this IC, output modes are selected, as
shown in the logic truth table, by entering appropriate H/L level into
the R, L and S inputs.
Two resistances are put between the output pin and the PSC pin
and the resistance ratios are appropriately adjusted to perform the
speed control.
In addition to the above, speed control can be done by varying the
voltage at VR pin, in the high speed mode.
PIN CONFIGURATION (TOP VIEW)
Speed control 1 PSC1 1
R input
R2
S input
S3
4
GND
5
L input
L6
Power supply L-VCC 7
Speed control 2 PSC2 8
16 P-VCC Power supply
15 O1 Output 1
14 VR High speed
control
13
GND
12
11 NC
10 O2 Output 2
9 P-VCC Power supply
Outline 16P2N-A
NC: no connection
LOGIC TRUTH TABLE
Input Output
Mode
R L S O1 O2
H H H H FG FF
Forward rotation high speed governor
H L H H G PLAY Forward rotation governor
L H H FG H REW ^{Reverse rotation high speed governor}
L L H G H REV Reverse rotation governor
H H L L L BRAKE Brake operation
L L L OFF OFF STB
HL L
LH L
Standby mode output high imp.
Reserved
G: Governor control output mode
FG: Rotating speed controllable with the voltage at VR pin (However, the
precision is worse than G.)
BLOCK DIAGRAM
Speed control 1
PSC1
1
High Speed
control
VR ₁₄
Output 1
O1
15
Output 2
O2
10
Speed control 2 Power supply
PSC2
VCC
8
7 9 16
(–)
Activation circuit
(–)
Control circuit
2
R
R input
6
L
L input
3
S
S input
4 5 12 13
GND