M54646AP Mitsubishi Electronics America, Inc., M54646AP Datasheet

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M54646AP

Manufacturer Part Number
M54646AP
Description
2-phase Motor Driver
Manufacturer
Mitsubishi Electronics America, Inc.
Datasheet

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DESCRIPTION
The M54646AP is a semiconductor IC to drive bipolar stepper
motors by controlling winding current with reference to a
designated current level.
FEATURES
APPLICATION
Office automation equipment such as printers, FDDs, HDDs and
facsimiles
FUNCTION
M54646AP Integrated Circuit drives two-phase bipolar stepper
motors while controlling winding current: It controls winding current
direction by inputting phases (pins 14 and 15) and, at the same
time, controls winding current amperage with terminals V
Provided with control circuits that output two phases, this IC is
sufficient to drive a two-phase bipolar stepper motor.
2
BLOCK DIAGRAM
Wide driver voltage range (10 – 40V)
Wide output current control range (20 – 800mA)
Bipolar and constant current control
Built-in flywheel diode
Built-in thermal protection circuit
and
supply (1)
27
Power
V
).
CC1
12
20 21 22 23
GND
V
27
R2
P
15
Comparator
input (2)
28
C
h2
2
Current sensor
1
t
OFF
= 0.69 • R
1
1
One-shot multi
time constant
T
M
• C
25
A2
T
M
16
T
19
2
B2
R
Mono-
stable
V
(pins
MM
18
Current
sensor
2
1
1
24
E
2
6 7 8 9
GND
V
Comparator reference
R1
2
PIN CONFIGURATION (TOP VIEW)
Comparator input (1)
Output terminal (1)
Output terminal (1)
Current sensor (1)
supply voltage (1)
supply voltage ((1)
Power supply (1)
P
voltage input (1)
14
direction switch
C
One-shot multi
Comparator
input (1)
Output current
h1
1
TSD
time constant
1
Output stage
Output stage
Current sensor
1
t
MITSUBISHI <CONTROL / DRIVER IC>
OFF
2-PHASE STEPPER MOTOR DRIVER
V
= 0.69 • R
MM
3
V
GND
V
1
1
1
V
Ph1
MM
M
M
MM
V
CC1
C
E
T
R1
A1
B1
1
1
1
1
1
T
11
10
12
13
14
1
2
3
4
5
6
7
8
9
Outline 28P4B
• C
M
One-shot multi
time constant (1)
4
A1
T
M
13
T
10
1
B1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
Mono-
stable
M54646AP
1
C
V
V
M
E
M
V
V
T
Ph2
1
GND
Current
sensor (1)
E
R2
MM
2
MM
CC2
2
2
A2
B2
5
1
2
2
Comparator input (2)
Comparator reference
voltage input (2)
Output stage
supply voltage (2)
Output terminal (2)
Current sensor (2)
Output terminal (2)
Output stage
supply voltage (2)
Power supply (2)
One-shot multi
time constant
Output current
direction switch
17
Power
supply (2)
V
CC2

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M54646AP Summary of contents

Page 1

... DESCRIPTION The M54646AP is a semiconductor IC to drive bipolar stepper motors by controlling winding current with reference to a designated current level. FEATURES Wide driver voltage range (10 – 40V) Wide output current control range (20 – 800mA) Bipolar and constant current control Built-in flywheel diode ...

Page 2

... 10V dVK/dt 50mV 5V, 1 phase CC “H” 2.4V I “L” 0.4V I MITSUBISHI <CONTROL / DRIVER IC> M54646AP 2-PHASE STEPPER MOTOR DRIVER Ratings -0.3 – 7 -0.3 – 45 -0.3 – 6 -0.3 – -0.3 – 15 -10 -10 1000 1.92 -20 – 85 -55 – 125 Unit Max. 5 800 ...

Page 3

... Single-pulse generator Mono-stable is triggered at comparator output phase rise edge. Mono-stable output pulse width is determined by input to timing terminals R t OFF If new trigger occurs during t (5) Analog control Stepless output current level variation is available by continuously changing voltage V comparator. M54646AP ...

Page 4

... C/W A: Mounted on 25cm glassfiber epoxy resin circuit board with one side copper-foiled c C/W B: With aluminum heat sink (1t) 10cm c C/W C: With aluminum heat sink (1t) 100cm c C 150 C (max) 100 M54646AP ...

Page 5

... V V CC1 CC2 Stepper motor MITSUBISHI <CONTROL / DRIVER IC> M54646AP 2-PHASE STEPPER MOTOR DRIVER 24V Phase ...

Page 6

... This IC has built in flywheel diode to provide a return current route to motor. To prevent overheating and malfunction in operational areas where great current and voltage are applied, install a Schottky diode externally. For details, refer to “Area of Safe Operation” and “Application Example.” before use. MITSUBISHI <CONTROL / DRIVER IC> M54646AP 2-PHASE STEPPER MOTOR DRIVER ...

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