L6223A ST Microelectronics, Inc., L6223A Datasheet - Page 3

• Manufacturer Part Number: L6223A
• Description: Dmos Programmable High Speed Unipolar Stepper Motor Driver
• Manufacturer: ST Microelectronics, Inc.

PIN DESCRIPTION
1,2
18,19
3
6
4,5
16,17
7
8
9
10,11
12,13
14
15
20
No.
OUT2,OUT1
OUT4,OUT3
BSTP
COM
GND
V
DA/CLEV
DA/OPLO
IN1,IN2
IN3,IN4
RC
V
SENSE
S
SS
Name
Outputs for motor windings.
A bootstrap capacitor connected between this pin and COM will
generate the internal overvoltage required for driving the gate of the
upper DMOS.
Output for common wire of motor.
Common ground. Also provides heatsinking to PCB.
Power supply
Digital input.
1) In PROGRAM MODE,operates in XOR with DA/OPLO to load data
2) In OPERATING MODE,works with the other digital inputs to reduce
Digital input.
1) In PROGRAM MODE, operates in XOR with DA/CLEV to load data
2) In OPERATING MODE,selects current control method: open loop (H)
Digital inputs. When all inputs are low level,the device is in
PROGRAMMING MODE.
In OPERATING MODE:
1) FULL MODE - IN1 to IN4 drive the motor phases.
2) SIMPLIFIED MODE - IN1 and IN2 drive the phases,IN3 is
Input for external RC network. Defines the higher of two possible
chopping frequencies. If this pin is set to ground it will reset the IC.
Logic supply.
Output for sense resistor.
into 6-bit shift register.
the current level (see Table 2 and Table 3).
into 6-bit shift register.
or closed loop (L).
A previous programming is requested.
ENABLE, IN4 works with DA/CLEV to enable the reduce current
level. Previous programming not needed.
Function
L6223A
3/33