M54646AP Datasheet, PDF (1/9 Pages) Mitsubishi Electric Semiconductor – 2-PHASE STEPPER MOTOR DRIVER

M54646AP
2-Phase Stepper Motor Driver
REJ03F0044-0100Z
Rev.1.0
Sep.19.2003
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
• Built-in thermal protection circuit
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_R (pins (2) and (27)).
Provided with control circuits that output two phases, this IC is sufficient to drive a two-phase bipolar stepper motor.
Pin Configuration
Comparator input (1) C1 → 1
Comparator reference
voltage input (1)
VR1 → 2
Output stage _{VMM1 3}
supply voltage (1)
Output terminal (1) MA1 ← 4
Current sensor (1) E1 ← 5
6
7
GND
8
9
Output terminal (1) MB1 ← 10
Output stage _{VMM1 11}
supply voltage (1)
Power supply (1) VCC1 12
One-shot multi
time constant
Output current
direction switch
T1 →← 13
Ph1 ^→ 14
28 ← C2 Comparator input (2)
27 ← VR2 ^{Comparator reference}
voltage input (2)
26 VMM2 ^{Output stage}
supply voltage (2)
25 → MA2 Output terminal (2)
24 → E2 Current sensor (2)
23
22
GND
21
20
19 → MB2 Output terminal (2)
18 VMM2 ^{Output stage}
supply voltage (2)
17 _VCC2 Power supply (2)
16 →← T2
15 ← Ph2
One-shot multi
time constant
Output current
direction switch
Outline 28P4B
Rev.1.0, Sep.19.2003, page 1 of 8