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L6284D, L6285, L6287

Table of contents:
Info of L6284D
Info of L6285
Info of L6287

L6284D, L6285, L6287 Selling Leads, Datasheet

MFG:ST Package Cooled:N/A D/C:1993

L6284D, L6285, L6287 Datasheet download

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Part Number: L6284D

MFG: ST

Package Cooled: N/A

D/C: 1993

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L6285 General Description

This Combo Motor Driver uses large scale integration to incorporate several functions into the same chip. 1) Two unipolar stepper motor driver 2) A full bridge DC motor driver 3) Serial microprocesor interface The power output stages are DMOS and the input can be interfaced to a CMOS Microprocessor logic.

The phase current in the unipolar stepper motor windings is controlled by two external sensing resistors in fixed frequency chopping mode. The oscillator block provides clocks each other 180° out of phase to the two stepper motor driver in order to avoid symultaneous current peaks. For the DC motor driver is used a bridge; the RMS voltage to supply this motor is fixed by asimple PWMopen loop. The 3 motors are controlled by the micro through 4 latches of 4 bit each.

The loading of these registers is in serial mode. The I.C. operates at 5V supply for the logic and at 24V supply for the power stages. The packages are SDIP42 and PLCC44 with 6 pins devoted to ground and to sink out the heat produced by power dissipation.

L6285 Maximum Ratings

Symbol	Parameter	Value	Unit
V_P	Power Supply Voltage	30	V
V_S	Logic Supply Voltage	7	V
V_in	Logic Input Voltage	-0.3 toVS+0.3	V
I_LOW	Low Side DMOS max DC Current	1	A
I_HIGH	High Side DMOS max DC Current	1	A
I_pLOW	Low Side DMOS max Peak Current (1ms On; 50ms OFF)	2	A
I_pHIGH	High Side DMOS max Peak Current (1ms On; 50ms OFF)	2	A
V_bout	Max Output Voltage of Stepper Motor Driver (transientrcirculation)	60	V
V_sense1;2	Max Voltage ON Vsense (CHA/CHB)	-1 to 2	V
V_{sense 3}	Max Voltage ON Vsense (CHC)	-1 to 2	V
I_fdDC	Max DC Current of Forward Diode (DMOS Source Drain Diode)	1	A
I_fdpk	Max Peak Current of Forward Diode (DMOS Source DrainDiode) (1ms On;50ms OFF)	2	A
P_tot	Total Power Dissipation (Tpins = 90°C) With minimized dissipating copper area (Tamb= 70°C)	5 1.6	W W
T_op	Operating Temperature Range	0 to 150	°C
T_stg	Storage Temperature Range	-40 to 150	°C

L6285 Connection Diagram

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