L6223 datasheet(3/33 Pages) STMICROELECTRONICS

3 / 33 page

No.

Name

Fun ction

1,2

18,19

OUT2,OUT1

OUT4,OUT3

Outputs for motor windings.

BSTP

A bootstrap capacitor connected between this pin and COM will

generate the internal overvoltage required for driving the gate of the

upper DMOS.

COM

Output for common wire of motor.

4,5

16,17

GND

Common ground. Also provides heatsinking to PCB.

7VS

Power supply

DA/CLEV

Digital input.

1) In PROGRAM MODE,operates in XOR with DA/OPLO to load data

into 6-bit shift register.

2) In OPERATING MODE,works with the other digital inputs to reduce

the current level (see Table 2 and Table 3).

DA/OPLO

Digital input.

1) In PROGRAM MODE, operates in XOR with DA/CLEV to load data

into 6-bit shift register.

2) In OPERATING MODE,selects current control method: open loop (H)

or closed loop (L).

10,11

12,13

IN1,IN2

IN3,IN4

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.

A previous programming is requested.

2) SIMPLIFIED MODE - IN1 and IN2 drive the phases,IN3 is

ENABLE, IN4 works with DA/CLEV to enable the reduce current

level. Previous programming not needed.

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.

VSS

Logic supply.

SENSE

Output for sense resistor.

PIN DESCRIPTION

L6223

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