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PDF M54685L Data sheet ( Hoja de datos )

Número de pieza M54685L
Descripción Bi-DIRECTIONAL MOTOR DRIVER WITH GOVERNOR
Fabricantes Mitsubishi 
Logotipo Mitsubishi Logotipo



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No Preview Available ! M54685L Hoja de datos, Descripción, Manual

MITSUBISHI <CONTROL / DRIVER IC>
M54685L
Bi-DIRECTIONAL MOTOR DRIVER WITH GOVERNOR
DESCRIPTION
The M54685L is a semiconductor integrated circuit that is capable
of directly driving a smallsize bi-directional motor rotating in both
forward and reverse directions.
FEATURES
q Wide range of operating voltage (VCC = 4.5 – 14V)
q Possible direct driving with TTL, PMOS and CMOS outputs
q Small outline (10-pin SIP)
q Built-in clamp diode
q Low output saturation voltage (large voltage across motors)
q Large output current drive (IO(max) = 500mA)
q Provided with brake functions
q Built-in thermal shutdown protection circuit
APPLICATION
Micro-cassette for phone-answering machine, tape deck, radio
cassette, and other sound equipment, and VTR and general
consumption appliances
FUNCTION
The M54685L 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 at right, by applying appropriate TTL-
level input to R, L and STB inputs.
The PLAY mode is a mode where speed is controllable and is used
to control the speed of motor by using two resistances, RT and RS,
as shown in the application example. RT and RS are generally
given by the following formulae:
RT = KRa (K: current proportional constant, Ra: Motor armature
resistance)
RS = Ka•N/IB (N: rotating speed, Ka: Motor generation constant, IB:
PSC bias current)
FSC and RSC are pins to connect resistance that restricts the
rotating speed in FF and PLAY.
PIN CONFIGURATION (TOP VIEW)
Output 1
FF speed control
REW speed control
Output 2
Speed control
R input
L input
Standby input
Power supply
O1
FSC
RSC
O2
GND
PSC
R
L
STB
VCC
1
2
3
4
5
6
7
8
9
10
Outline 10P5
LOGIC TRUTH TABLE
R L STB
Mode
L L H High speed forward rotation (FF)
L H H GOVERNOR forward rotation (PLAY)
H L H High speed reverse rotation (REW)
H H H Brake
L Standby
BLOCK DIAGRAM Power supply
VCC
10
PSC
6
Output 2
O2
4
Output 1
O1
1
Governor
circuit
Control circuit
(Thermal protection circuit)
7
R
R input
89
L STB
L input Standby input
2 53
FSC
GND
RSC
FF speed control
REW speed control

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