E-L6258EX datasheet, PDF - EEWORLD Datasheet

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E-L6258EX: DescriptionPrecision Amplifiers High Precision Oper Amplifier; CategoryOther integrated circuit (IC) The signal circuit; File Size270KB，32 Pages; ManufacturerSTMicroelectronics; Websitehttp://www.st.com/; Environmental Compliance

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E-L6258EX Overview

Precision Amplifiers High Precision Oper Amplifier

E-L6258EX Parametric

Parameter Name	Attribute value
Brand Name	STMicroelectronics
Is it Rohs certified?	conform to
Parts packaging code	SOIC
package instruction	SSOP, SSOP36,.56
Contacts	36
Reach Compliance Code	compliant
ECCN code	EAR99
Factory Lead Time	11 weeks
Analog Integrated Circuits - Other Types	STEPPER MOTOR CONTROLLER
JESD-30 code	R-PDSO-G36
JESD-609 code	e0
length	15.9 mm
Number of functions	1
Number of terminals	36
Maximum output current	1.5 A
Package body material	PLASTIC/EPOXY
encapsulated code	SSOP
Encapsulate equivalent code	SSOP36,.56
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	NOT SPECIFIED
power supply	5,40 V
Certification status	Not Qualified
Maximum seat height	3.6 mm
Maximum supply current (Isup)	15 mA
Maximum supply voltage (Vsup)	5.25 V
Minimum supply voltage (Vsup)	4.75 V
Nominal supply voltage (Vsup)	5 V
surface mount	YES
technology	BCDMOS
Terminal form	GULL WING
Terminal pitch	0.65 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED
width	11 mm
Base Number Matches	1

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L6258EX

PWM controlled

high current DMOS universal motor driver

Features

■

Able to drive both windings of a bipolar stepper

motor or two DC motors

Output current up to 1.5A each winding

Wide voltage range: 12V to 40V

Four quadrant current control, ideal for

microstepping and DC motor control

Precision PWM control

No need for recirculation diodes

TTL/CMOS compatible inputs

Cross conduction protection

Thermal shutdow

The power stage is a dual DMOS full bridge

capable of sustaining up to 40V, and includes the

diodes for current recirculation.The output current

capability is 1.5A per winding in continuous mode,

with peak start-up current up to 2A. A thermal

protection circuitry disables the outputs if the chip

temperature exceeds the safe limits.

PowerSO36

Description

L6258EX is a dual full bridge for motor control

applications realized in BCD technology, with the

capability of driving both windings of a bipolar

stepper motor or bidirectionally control two DC

motors.

L6258EX and a few external components form a

complete control and drive circuit. It has high

efficiency phase shift chopping that allows a very

low current ripple at the lowest current control

levels, and makes this device ideal for steppers as

well as for DC motors.

Table 1.

Device summary

Order code

E-L6258EX

E-L6258EXTR

Package

PowerSO36

Packing

Tube

Tape&Reel

December 2007

Rev 6

1/32

www.st.com

Contents

L6258EX

Contents

Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.1

2.2

2.3

2.4

2.5

2.6

2.7

Reference voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Input logic (I0 - I1 - I2 - I3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Phase input ( PH ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Triangular generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Charge pump circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Current control loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Current control loop compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

PWM current control loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.1

3.2

3.3

3.4

3.5

Open loop transfer function analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Power amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Load attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Error amplifier and sense amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Effect of the Bemf on the current control loop stability . . . . . . . . . . . . . . . 22

Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4.1

4.2

4.3

4.4

Interference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Motor selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Unused inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Notes on PCB design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Operation mode time diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

2/32

List of figures

L6258EX

List of figures

Figure 1.

Figure 2.

Figure 3.

Figure 4.

Figure 5.

Figure 6.

Figure 7.

Figure 8.

Figure 9.

Figure 10.

Figure 11.

Figure 12.

Figure 13.

Figure 14.

Figure 15.

Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Thermal characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Power bridge configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Current control loop block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Output comparator waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Ax bode plot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Aloop bode plot (uncompensated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Aloop bode plot (compensated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Electrical model of the load. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Typical application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Full step operation mode timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Half step operation mode timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

4 bit microstep operation mode timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

PowerSO36 mechanical data & package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

4/32

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