ST L6219R User Manual

L6219R

Stepper motor driver

Features

■Able to drive both windings of bipolar stepper motor

■Output current up to 500 mA each winding

■Wide voltage range 4.5 V to 10 V

■Half-step, full-step and microstepping mode

■Built-in protection diodes

■Internal pwm current control

■Low output saturation voltage

■Designed for unstabilized motor supply voltage

■Internal thermal shutdown

Description

The L6219R is a bipolar monolithic integrated circuits intended to control and drive both winding of a bipolar stepper motor or bidirectionally control two DC motors.The L6219R with a few external components form a complete control and drive circuit for LS-TTL or microprocessor controlled stepper motor system.The power stage is a dual full bridge capable of sustaining 10 V and including four diodes for current recirculation.

SO-24 (20+2+2)

A cross conduction protection is provided to avoid simultaneous cross conduction during switching current direction.

An internal pulse-width-modulation (PWM) controls the output current to 500mA with peak start-up current up to 1 A. Wide range of current control from 500 mA (each bridge) is permitted by means of two logic inputs and an external voltage reference. A phase input to each bridge determines the load current direction. A thermal protection circuitry disables the outputs if the chip temperature exceeds safe operating limits.

Table 1.	Device summary
	Part number	Package	Packing
	L6219R	SO-24	Tube
	L6219R013TR	SO-24	Tape & reel
	E-L6219R(1)	SO-24	Tube
	E-L6219R013TR (1)	SO-24	Tape & reel

1. Lead free package (ECOPACK®) see Chapter 5.

September 2008

Rev 4

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www.st.com

Table of contents	L6219R

Table of contents

1	Block diagram and pins description . . . . . . . . . . . . . . . . . . . . . . . . . . .		. 5
2	Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		. 7
	2.1	Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7
	2.2	Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7
	2.3	Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	8
3	Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		10
	3.1	Input logic (I0 and I1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10
	3.2	Phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10
	3.3	Current sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10
	3.4	Single-pulse generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	11
	3.5	Output stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	11
	3.6	VS, VSS, VRef . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	11
4	Application informations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		12
	4.1	Electrical characteristics curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	13
5	Package informations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		14
6	Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		15

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L6219R	List of tables

List of tables

Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Table 2. Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 3. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Table 4. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Table 5. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Table 6. Input logic current level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Table 7. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

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List of figures	L6219R

List of figures

Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 2. Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 3. Windings of a bipolar stepper motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 4. Principle operating sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Figure 5. Typical application circuit.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Figure 6. Maximum output current vs. supply voltage (DAC=100%) . . . . . . . . . . . . . . . . . . . . . . . . . 13 Figure 7. Maximum reference voltages vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Figure 8. Maximum output current vs. reference voltage (DAC=100%) . . . . . . . . . . . . . . . . . . . . . . 13 Figure 9. SO-24 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

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L6219R	Block diagram and pins description

1 Block diagram and pins description

Figure 1. Block diagram

Figure 2. Pin connection (top view)

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