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E-L6506D

更新时间：2025-07-09 14:05:11

品牌：STMICROELECTRONICS

描述：STEPPER MOTOR CONTROLLER, PDSO20, SOP-20

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概述
规格参数
数据手册

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E-L6506D 概述

STEPPER MOTOR CONTROLLER, PDSO20, SOP-20 运动控制电子器件

E-L6506D 规格参数

生命周期：	Active	零件包装代码：	SOIC
包装说明：	SOP,	针数：	20
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.37
Is Samacsys：	N	模拟集成电路 - 其他类型：	STEPPER MOTOR CONTROLLER
JESD-30 代码：	R-PDSO-G20	JESD-609代码：	e3
长度：	12.8 mm	功能数量：	1
端子数量：	20	封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	认证状态：	Not Qualified
座面最大高度：	2.65 mm	最大供电电压 (Vsup)：	7 V
最小供电电压 (Vsup)：	4.5 V	标称供电电压 (Vsup)：	5 V
表面贴装：	YES	端子面层：	MATTE TIN
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL	宽度：	7.5 mm
Base Number Matches：	1

E-L6506D 数据手册

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L6506

L6506D

CURRENT CONTROLLER FOR STEPPING MOTORS

DESCRIPTION

The L6506/D is a linear integrated circuit designed

to sense and control the current in stepping motors

and similar devices. When used in conjunction with

the L293, L298, L7150, L6114/L6115, the chip set

forms a constant current drive for an inductive load

and performs all the interface function from the con-

trol logic thru the power stage.

DIP18

SO20

Two or more devices may be synchronized using

the sync pin. In this mode of operation the oscillator

in the master chip sets the operating frequency in all

chips.

ORDERING NUMBERS:

L6506

L6506D

BLOCK DIAGRAM (pin’s number referred to DIP-18)

July 2003

1/8

L6506 -L6506D

PIN CONNECTIONS (top view)

DIP18

SO20

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

Value

Unit

V_CC

V_i

Supply Voltage

Input Signals

P_tot

0.8

Total Power Dissipation (T_amb= 70°C) for DIP18

Total Power Dissipation (Tamb =70ÉC) for SO20

T_j

Junction Temperature

Storage Temperature

150

°C

T_stg

-40 to 150

THERMAL DATA

Symbol

Parameter

DIP18

SO20

Unit

R_{th j-amb}

Thermal Resistance Junction-ambient

Max.

100

°C/W

ELECTRICAL CHARACTERESTICS (V_CC= 5.0V, T_amb= 25°C; unless otherwise noted)

Symbol

V_CC

Parameter

Supply Voltage

Quiescent Supply Current

Test Conditions

Min.

Typ.

Max.

Unit

4.5

I_CC

V_CC= 7V

COMPARATOR SECTION

Symbol

V_IN

Parameter

Test Conditions

V_senseInputs

Min.

Typ.

Max.

Unit

Input Voltage Range

Input Offset Voltage

Input Offset Current

Input Bias Current

Response time

–0.3

V_IO

V_IN= 1.4V

±5.0

±200

I_IO

I_IB

µA

µs

V_REF= 1.4V V_SENS= 0 to 5V

0.8

1.5

2/8

L6506 - L6506D

ELECTRICAL CHARACTERISTICS (continued)

COMPARATOR SECTION PERFORMANCE (Over Operating Temperature Range)

Symbol

V_IO

Parameter

Input Offset Voltage

Input Offset Curent

Test Condtions

V_IN= 1.4V

Min.

Typ.

Max.

±20

Unit

I_IO

±500

LOGIC SECTION (Over Operating Temperature Range - TTL compatible inputs & outputs)

Symbol

V_IH

Parameter

Input High Voltage

Test Condtions

Min.

Typ.

Max.

V_s

Unit

V_IL

Input Low Voltage

0.8

V_OH

Output High Voltage

V_CC= 4.75V

3.5

I_OH= 400µA

V_OL

I_OH

Ouptut Low Voltage

V_CC= 4.75V

0.25

0.4

I_OH= 4mA

Ouput Source Current - Outputs

1 - 4

V_CC= 4.75V

2.75

OSCILLATOR

Symbol

Parameter

Test Condtions

Min.

Typ.

Max.

Unit

KHz

f_osc

V_thL

V_thH

R_i

Frequency Range

Lower Threshold Voltage

Higher Threshold Voltage

Internal Discharge Resistor

0.33 V_CC

0.66 V_CC

0.7

1.3

kΩ

CIRCUIT OPERATION

The L6506 is intended for use with dual bridge driv-

ers, such as the L298, quad darlington arrays, such

as the L7150, quad DMOS array such as L6114-

L6115, or discrete power transistors to drive stepper

motors and other similar loads. The main function of

the device isto sense and control the currentin each

of the load windings.

tor and V_ref. Since separate inputs are provided for

each chopper, each of the loads may be pro-

grammed independently allowing the device to be

used to implement microstepping of the motor.

Lower threshold of L6506’s oscillator is 1/3 V_CC. Up-

per threshold is 2/3 V_CCand internal discharge re-

sistor is 1 KΩ ± 30 %.

Acommonon-chiposcillatordrivesthedualchopper

and sets the operating frequency for the pulse width

modulated drive. The RC network on pin 1 sets the

operating frequency which is given by the equation

Ground noise problems in multiple configurations

can be avoided by synchronizing the oscillators.

This may be done by connecting the sync pins of

each of the devices with the oscillator output of the

master device and connecting the R/C pin of the un-

used oscillators to ground.

f =

for R > 10 K

0.69 RC

The equations for the active time of the sync pulse

(T2), the inactive time ofthe syncsignal (T1)and the

dutycyclecan befoundbylookingatthefigure1and

are :

The oscillator provides pulses to set the two flip-

flops which in turn cause the outputs to activate the

drive. When the current in the load winding reaches

the programmed peak value, the voltage across the

sense resistor (R_sense) is equal to V_refand the cor-

responding comparator resets its flip-flop interrupt-

ing the drive current until the next oscillatorpulse oc-

curs. The peak current in each winding is pro-

grammed by selecting the value of the sense resis-

R1 R_IN

R1 + R_IN

T2 = 0.69 C1

(1)

(2)

(3)

T1 = 0.69 R1 C1

DC =

T1 + T2

3/8

L6506 -L6506D

By substituting equations 1 and 2 into equation 3

and solving for the value of R1 the following equa-

tions for the external components can be derived :

Looking at equation 1 it can easily be seen that the

minimum pulse width of T2 will occur when the value

of R1 is at its minimum and the value of R1 at its

maximum. Therefore, when evaluating equation 4

the minimum value for R1 of 700Ω (1 KΩ – 30 %)

should be used to guarantee the required pulse

width.

R1 = (

– 2) R_IN

(4)

0.69 R1

C1 =

(5)

Figure 1 : Oscillator Circuit and Waveforms.

APPLICATIONS INFORMATION

The circuits shown in figure 2 use the L6506 to im-

plement constant current drives for stepper motors.

Figure 2 shows the L6506 used with the L298 to

drive a 2 phase bipolar motor. The peak current can

be calculated using the equation :

The L6506 may be used to implement eitherfull step

or half step drives. In the case of 2 phase bipolar

stepper motor applications, if a half step drive is

used, the bridge requires an additional input to dis-

able the power stage during the half step. If used in

conjunction with the L298 the enable inputs may be

used for this purpose.

V_ref

I_peak

R_sense

For quad darlington array in 4 phase unipolar motor

applications half step may be implemented using

the 4 phase inputs.

The circuit of Fig.2 can be used in applications re-

quiring different peak and hold current values by

modifying the reference voltage.

The L6506 may also be used to implement mi-

crostepping of either bipolar or unipolar motors.

4/8

L6506 - L6506D

Figure 2 : Application Circuit Bipolar Stepper Motor Driver. (pin’s number referred to DIP18)

5/8

L6506 -L6506D

inch

DIM.

OUTLINE AND

MECHANICAL DATA

MIN. TYP. MAX. MIN. TYP. MAX.

0.254

1.39

0.010

1.65 0.055

0.065

0.915

0.46

0.25

0.018

0.010

23.24

8.5

2.54

20.32

0.335

0.100

0.800

7.1

0.280

0.155

3.93

3.3

0.130

DIP18

1.27

1.59

0.050 0.063

6/8

L6506 - L6506D

inch

OUTLINE AND

MECHANICAL DATA

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

2.35

0.1

2.65 0.093

0.3 0.004

0.104

0.012

0.020

0.013

0.512

0.299

0.33

0.23

12.6

7.4

0.51 0.013

0.32 0.009

0.496

0.291

7.6

1.27

0.050

0.25

0.4

10.65 0.394

0.75 0.010

0.419

0.030

0.050

1.27 0.016

SO20

0˚ (min.)8˚ (max.)

h x 45˚

SO20MEC

7/8

L6506 -L6506D

Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the conse-

quences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No

license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this

publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMi-

croelectronics products are not authorized for use as critical components in life support devices or systems without express written

approval of STMicroelectronics.

The ST logo is a registered trademark of STMicroelectronics

STMicroelectronics GROUP OF COMPANIES

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http://www.st.com

8/8

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