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STMicroelectronics Electronic Components Datasheet

L6285S Datasheet

3 CHANNELS MULTIPOWER SYSTEM

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L6285S pdf
L6285
3 CHANNELS MULTIPOWER SYSTEM
ADVANCE DATA
CHANNEL-A AND CHANNEL-B FOR UNIPO-
LAR STEPPER MOTORS
– LOW SIDE: RDSON = 1.2
– HIGH SIDE ; RDSON = 1.2
CHANNEL-C FOR DC MOTORS
– LOW SIDE: RDSON = 1.7
– HIGH SIDE: RDSON = 1.2
CHOPPING MODE DRIVING FOR C.L. CUR-
RENT CONTROL ON CHA AND CHB AND
O.L. VOLTAGE CONTROL ON CHC.
INTERNAL FOUR DRIVING LATCHES
16 BIT INTERNAL SHIFT REGISTER
DIRECT INTERFACE TO µP
SERIAL DRIVING SEQUENCE LOADING
CMOS COMPATIBLE INPUTS
PRE-ALARM OUTPUT SIGNAL
THERMAL SHUTDOWN
DESCRIPTION
This Combo Motor Driver uses large scale inte-
gration to incorporate several functions into the
same chip.
1) Two unipolar stepper motor driver
2) A full bridge DC motor driver
BLOCK DIAGRAM
MULTIPOWER BCD TECHNOLOGY
PLCC44
SDIP42
ORDERING NUMBERS:
L6285
L6285S
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 re-
sistors in fixed frequency chopping mode. The os-
cillator 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 a
May 1994
1/16
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.


STMicroelectronics Electronic Components Datasheet

L6285S Datasheet

3 CHANNELS MULTIPOWER SYSTEM

No Preview Available !

L6285S pdf
L6285
simple PWM open loop. The 3 motors are control-
led 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
PIN CONNECTION (Top view)
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.
PWGND
OUT1A
S1,2A
OUT2A
CLAMPA
OUT3A
S3,4A
OUT4A
BOOT1
BOOT3
GND
6 5 4 3 2 1 44 43 42 41 40
7
8
9
10
11
12 PLCC44
13
14
15
16
17
39
38
37
36
35
34
33
32
31
30
29
18 19 20 21 22 23 24 25 26 27 28
PWGND
OUT1B
S1,2B
OUT2B
CLAMPB
OUT3B
S3,4B
OUT4B
VLOW
COSC
GND
D94IN067
OUT2C
COM1,2A
VP
COM3,4A
N.C.
PWGND
OUT1A
S1,2A
OUT2A
CLAMPA
OUT3A
S3,4A
OUT4A
BOOT1
BOOT3
GND
N.C.
BOOT2
SID
SCK
STB
1
2
3
4
5
6
7
8
9
10 SDIP42
11
12
13
14
15
16
17
18
19
20
21
D94IN060A
42 S1,2C
41 OUT1C
40 COM1,2B
39 VP
38 COM3,4B
37 PWGND
36 OUT1B
35 S1,2B
34 OUT2B
33 CLAMPB
32 OUT3B
31 S3,4B
30 OUT4B
29 VLOW
28 COSC
27 GND
26 V2
25 OSC RESET
24 A1TH
23 A0TH
22 VS
ABSOLUTE MAXIMUM RATINGS
Symbol
VP
VS
Vin
ILOW
IHIGH
IpLOW
IpHIGH
Vbou t
Vsense 1;2
Vsense 3
Ιfd DC
Ιfdpk
Pto t
To p
Tstg
Parameter
Power Supply Voltage
Logic Supply Voltage
Logic Input Voltage
Low Side DMOS max DC Current
High Side DMOS max DC Current
Low Side DMOS max Peak Current (1µs On; 50µs OFF)
High Side DMOS max Peak Current (1µs On; 50µs OFF)
Max Output Voltage of Stepper Motor Driver (transient
rcirculation)
Max Voltage ON Vsense (CHA/CHB)
Max Voltage ON Vsense (CHC)
Max DC Current of Forward Diode (DMOS Source Drain Diode)
Max Peak Current of Forward Diode (DMOS Source Drain
Diode) (1µs On; 50µs OFF)
Total Power Dissipation (Tpins = 90°C)
With minimized dissipating copper area (Tamb = 70°C)
Operating Temperature Range
Storage Temperature Range
THERMAL DATA (PLCC44)
Symbol
Rth j-pins
Rth j-amb
Description
Thermal Resistance Junction-pins
Thermal Resistance Junction-ambient
Max.
Max.
2/16
Value
30
7
-0.3 to VS + 0.3
1
1
2
2
60
-1 to 2
-1 to 2
1
2
5
1.6
0 to 150
-40 to 150
SDIP42
15
48
PLCC44
12
50
Unit
V
V
V
A
A
A
A
V
V
V
A
A
W
W
°C
°C
Unit
°C/W
°C/W


Part Number L6285S
Description 3 CHANNELS MULTIPOWER SYSTEM
Maker STMicroelectronics
Total Page 16 Pages
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