L6228Q datasheet(26/32 Pages) STMICROELECTRONICS

Part #	L6228Q

Description	DMOS driver for bipolar stepper motor

PDF	32 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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26 / 32 page

Output current capability and IC power dissipation

L6228Q

26/32

Doc ID 14321 Rev 4

Figure 27.

IC power dissipation versus output current in NORMAL mode

(full step two phase on)

Figure 28.

IC power dissipation versus output current in WAVE mode

(full step one phase on)

Figure 29.

IC power dissipation versus output current in MICROSTEPPING mode

No PWM

fSW = 30 kHz (slow decay)

Test Conditions:

Supply Volt age =24 V

I A

I B

IOUT

PD [W ]

I OUT [A ]

NORM AL DRIVE

0.25 0.5 0.75

1.25 1.5

No PW M

fSW = 3 0 kHz (slow decay)

Test Conditions:

Supply Voltage = 24V

I A

I B

IOUT

WAVE DRIVE

PD [W]

I OUT [A]

0.25 0.5 0.75 1

1.25 1.5

fSW = 50 k

Hz (slow decay)

fSW = 30 k

Hz (slow decay)

I A

I B

IOUT

MICROSTEPPING

PD [W]

I OUT [A]

Test Conditions:

Supply Voltage = 24V

0.25 0.5 0.75 1

1.25 1.5

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