CS3717A Datasheet, PDF (1/8 Pages) Cherry Semiconductor Corporation – 1A H-Bridge Stepper Motor Driver

CS3717A
1A H-Bridge Stepper Motor Driver
Description
The CS3717A controls and drives
one phase of a bipolar stepper motor
with chopper control of the phase
current. Current levels may be
selected in three steps by means of
two logic inputs which select one of
three current comparators. When
both of these inputs are high the
device is disabled. A separate logic
input controls the direction of cur-
rent flow. A monostable, pro-
grammed by an external RC net-
work, sets the current decay time.
The power section is a full H-bridge
driver with four internal clamp
diodes for current recirculation. An
external connection to the lower
emitters is available for the insertion
of a sensing resistor. Two CS3717A’s
and several external components
form a complete stepper motor drive
subsystem.
The recommended operating ambient
temperature range is from 0° to 70°C.
The CS3717A is supplied in a 16 lead
PDIP.
Absolute Maximum Ratings
Power Supply Voltage (V_DDA, V_DDB)............................................................50V
Logic Supply Voltage (V_CC) .............................................................................7V
Logic Input Voltage (IN0, IN1, DIRECTION) ...............................................6V
Comparator Input............................................................................................V_CC
Reference Input Voltage..................................................................................15V
Output Current (DC Operation)...................................................................1.2A
Storage Temperature .................................................................–55°C to +150°C
Operating Junction Temperature ............................................–40°C to +150°C
Lead Temperature Soldering
Wave Solder(through hole styles only) ...........10 sec. max, 260°C peak
Block Diagram
IN0
IN1
DIRECTION
V_{DDA OUTA} OUTB V_DDB
V_CC
V_REF
Gnd
6KΩ
223Ω
223Ω
105Ω
00 01
10
11
+
-
+
-
+
MONO-
-
STABLE
THERMAL
SHUTDOWN
Features
s Full/Half /Quarter Step
Operation
s Output Current Up to 1 A
s Motor Supply Voltage
10V to 46V
s Integrated Bootstrap
Lowers Saturation Voltage
s Built In Protection Diodes
s Externally Selectable
Current Level
s Digital or Analog Control
of Output Current Level
s Thermal Overload
Protection
s Minimum External
Components
Package Options
16L PDIP
(Internally Fused Leads)
OUTB 1
Pulse
V_DDB
Gnd
Gnd
V_CC
IN1
DIRECTION
Sense
OUTA
V_DDA
Gnd
Gnd
V_REF
Comp In
IN0
Comp In
Pulse
December, 2001 - Rev. 4
Sense
1
ON Semiconductor
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885–3600 Fax: (401)885–5786
N. American Technical Support: 800-282-9855
Web Site: www.cherry–semi.com