L9942 datasheet(1/40 Pages) STMICROELECTRONICS

部件名	L9942

功能描述	Integrated stepper motor driver for bipolar stepper motors with microstepping and programmable current profile

PDF	40 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

1 / 40 page

September 2013

Doc ID 11778 Rev 7

1/40

1

L9942

Integrated stepper motor driver for bipolar stepper motors

with microstepping and programmable current profile

Features

■ Two full bridges for max. 1.3 A load

(RDSON = 500 m)

■ Programmable current waveform with look-up

table: 9 entries with 5 bit resolution

■ Current regulation by integrated PWM

controller and internal current sensing

■ Programmable stepping mode: full, half, mini

and microstepping

■ Programmable slew rate for EMC and power

dissipation optimization

■ Programmable Fast-, Slow-, Mixed- and Auto-

Decay Mode

■ Full-scale current programmable with 3 bit

resolution

■ Programmable stall detection

■ Step clock input for reduced µController

requirements

■ Very low current consumption in standby mode

IS < 3 µA, typ. Tj  85 °C

■ All outputs short circuit protected with

openload, overload current, temperature

warning and thermal shutdown

■ The PWM signal of the internal PWM controller

is available as digital output.

■ All parameters are guaranteed for 3 V < Vcc <

5.3 V and for 7 V < Vs < 20 V

Applications

Stepper motor driver for bipolar stepper motors in

automotive applications like light levelling,

Bending light and Throttle control.

Description

The L9942 is an integrated stepper motor driver

for bipolar stepper motors with microstepping and

programmable current profile look-up-table to

allow a flexible adaptation of the stepper motor

characteristics and intended operating conditions.

It is possible to use different current profiles

depending on target criteria: audible noise,

vibrations, rotation speed or torque. The decay

mode used in PWM-current control circuit can be

programmed to slow-, fast-, mixed-and auto-

decay. In autodecay mode device will use slow

decay mode if the current for the next step will

increase and the fast decay or mixed decay mode

if the current will decrease. The programmable

stall detection is useful in case of head lamp

leveling and bending light application, by

preventing to run the motor too long time in stall

for position alignment. If a stall is detected, the

alignment process is closed and the noise is

minimized.

PowerSSO24

Table 1.

Device summary

Order code

Junction temp. range,

CPackage

Packing

L9942XP1

-40 to 150

PowerSSO24

Tube

L9942XP1TR

-40 to 150

PowerSSO24

Tape and reel

www.st.com

类似零件编号 - L9942

制造商	部件名	数据表	功能描述
STMicroelectronics	L9942	575Kb / 37P	Integrated stepper motor driver for bipolar stepper motors with microstepping and programmable current profile 07-Nov-2005
	L9942XP1	524Kb / 40P	Integrated stepper motor driver for bipolar stepper motors with microstepping and programmable current profile 19-Sep-2013
	L9942XP1TR	524Kb / 40P	Integrated stepper motor driver for bipolar stepper motors with microstepping and programmable current profile 19-Sep-2013

More results

类似说明 - L9942

制造商	部件名	数据表	功能描述
STMicroelectronics	L9942	575Kb / 37P	Integrated stepper motor driver for bipolar stepper motors with microstepping and programmable current profile 07-Nov-2005
Allegro MicroSystems	A3989	1Mb / 12P	Bipolar Stepper and High Current DC Motor Driver
Allegro MicroSystems	A3989_V	382Kb / 13P	Bipolar Stepper and High Current DC Motor Driver
STMicroelectronics	EVAL6208N	469Kb / 27P	DMOS DRIVER FOR BIPOLAR STEPPER MOTOR Sep-2003
STMicroelectronics	L9942XP1TR	524Kb / 40P	Integrated stepper motor driver for bipolar stepper motors with microstepping and programmable current profile 19-Sep-2013
Allegro MicroSystems	A4979GLPTR-T	1Mb / 44P	Microstepping Programmable Stepper Motor Driver With Stall Detect and Short Circuit Protection
STMicroelectronics	AN2650	691Kb / 26P	L9942 stepper motor driver for bipolar stepper motors 05-Dec-2013
STMicroelectronics	AN1495	714Kb / 25P	Microstepping stepper motor drive 26-Sep-2012
Allegro MicroSystems	A5989	775Kb / 14P	Bipolar Stepper and High-Current DC Motor Driver
TRINAMIC Motion Control...	TMC2226	1Mb / 83P	POWER DRIVER FOR STEPPER MOTORS INTEGRATED CIRCUITS