February 1999
PBD 3517/1
Stepper Motor
Drive Circuit
Description
PBD 3517/1 is a bipolar, monolithic, integrated circuit, intended to drive a stepper motor
in a unipolar, bilevel way.
One PBD 3517/1 and a minimum of external components form a complete control
and drive unit for LS-TTL- or microprocessor-controlled stepper motor system for
currents up to 500mA. The driver is suited for applications requiring least-posssible RFI.
Motor performance can be increased by operating in a bilevel drive mode. This
means that a high voltage pulse is applied to the motor winding at the beginning of a
step, in order to give a rapid rise of current.
Key Features
• Complete driver and phase logic on
chip
• 2 x 350 mA continuous-output current
• Half- and full-step mode generation
• LS-TTL-compatible inputs
• Bilevel drive mode for high step rates
• Voltage-doubling drive possibilities
• Half-step position-indication output
• Minimal RFI
• 16-pin plastic DIP package or 16 pin
small outline wide body
V
CC
V
SS
PQR
RC
Mono
F-F
L
A
L
B
STEP
P
B2
INH
O
A
O
B
P
A2
P
A1
GND
16-pin plastic DIP
16-pin SO (wide body)
Figure 1. Block diagram.
1
P
B
HSM
P
B
P
B1
D
35
17
DIR
Phase
Logic
P
A
P
B
D
/1
35
17
/
1
PBD 3517/1
ERICSSON [ ERICSSON ]
