Datasheet

ManualsBrandsST ManualsDriversMotor Driver IC, SO-20, 2.75mA

L6506

L6506D

July 2003

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.

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.

DIP18 SO20

ORDERING NUMBERS:

L6506 L6506D

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

1/8

Summary of content (8 pages)

PAGE 1
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 control logic thru the power stage. Two or more devices may be synchronized using the sync pin.
PAGE 2
L6506 -L6506D PIN CONNECTIONS (top view) DIP18 SO20 ABSOLUTE MAXIMUM RATINGS Symbol Value Unit VCC Vi Supply Voltage Input Signals 10 7 V V Ptot Total Power Dissipation (Tamb = 70°C) for DIP18 Total Power Dissipation (Tamb = 70ÉC) for SO20 Junction Temperature 1 0.8 W W 150 °C -40 to 150 °C Tj Tstg Parameter Storage Temperature THERMAL DATA Symbol Rth j-amb Parameter Thermal Resistance Junction-ambient Max. DIP18 SO20 Unit 80 100 °C/W ELECTRICAL CHARACTERESTICS (VCC = 5.
PAGE 3
L6506 - L6506D ELECTRICAL CHARACTERISTICS (continued) COMPARATOR SECTION PERFORMANCE (Over Operating Temperature Range) Symbol Parameter VIO Input Offset Voltage IIO Input Offset Curent Test Condtions Min. Typ. VIN = 1.4V Max. Unit ±20 mV ±500 nA Max. Unit Vs V 0.8 V V 0.
PAGE 4
L6506 -L6506D (5) 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. APPLICATIONS INFORMATION The circuits shown in figure 2 use the L6506 to implement constant current drives for stepper motors.
PAGE 5
L6506 - L6506D Figure 2 : Application Circuit Bipolar Stepper Motor Driver.
PAGE 6
L6506 -L6506D mm DIM. MIN. a1 0.254 B 1.39 TYP. inch MAX. MIN. TYP. MAX. OUTLINE AND MECHANICAL DATA 0.010 1.65 0.055 0.065 b 0.46 0.018 b1 0.25 0.010 D 23.24 0.915 E 8.5 0.335 e 2.54 0.100 e3 20.32 0.800 F 7.1 0.280 I 3.93 0.155 L 3.3 Z 1.27 0.130 DIP18 6/8 1.59 0.050 0.
PAGE 7
L6506 - L6506D mm inch OUTLINE AND MECHANICAL DATA DIM. MIN. TYP. MAX. MIN. TYP. MAX. A 2.35 2.65 0.093 0.104 A1 0.1 0.3 0.004 0.012 B 0.33 0.51 0.013 0.020 C 0.23 0.32 0.009 0.013 D 12.6 13 0.496 0.512 E 7.4 7.6 0.291 0.299 e 1.27 0.050 H 10 10.65 0.394 0.419 h 0.25 0.75 0.010 0.030 L 0.4 1.27 0.016 0.050 SO20 K 0˚ (min.)8˚ (max.
PAGE 8
L6506 -L6506D Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences 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.