L292_03 STMICROELECTRONICS [STMicroelectronics], L292_03 Datasheet - Page 3

• Manufacturer Part Number: L292_03
• Description: SWITCH-MODE DRIVER FOR DC MOTORS
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

ELECTRICAL CHARACTERISTCS
SYSTEM DESCRIPTION
The L290, L291 and L292 are intended to be used as a 3-chip microprocessor controlled positioning sys-
tem. The device may be used separately - particularly the L292 motor driver - but since they will usually
be used together, a description of a typical L290/1/2 system follows.
At the time, the microprocessor orders a switch to the position mode, (strobe signal at pin 8 of L291) and
within 3 to 4 ms the L292 drives the motor to a null position, where it is held by electronic "de-tenting".
The mechanical/electrical interface consists of an
Figure 1. System Block Diagram
Symbol
V
V
f
V
I
V
V
---- -
V
osc
I
inh
V
I
I
I
RS
inh
d
os
o
o
i
S
D
i
i
Supply Voltage
Quiescent Drain Current
Input Offset Voltage (pin 6)
Inhibit Low Level (pin 12, 13)
Inhibit High Level
Low Voltage Condition
High Voltage Condition
Input Current (pin 6)
Input Voltage (pin 6)
Output Current
Total Drop Out Voltage
Sensing Resistor Voltage Drop
Transconductance
Frequency range (pin 10)
Parameter
V
I
V
V
V
V
R
I
I
VI = ±9.8V
Including sensor resistor
I
I
T
R
R
o
o
o
o
o
j
S
inh
inh
I
I
s1
s1
s1
= 0
= 2A
= -2A
= 2A
= 1A
= 150°C I
= -8.8V
= +8.8V
= 20V (offset null)
(L) = 0.4V
(H) = 3.2V
= R
= R
= R
s2
s2
s2
Test Condition
= 0.2
= 0.2
= 0.42
s1
o
= 2A
= R
s2
= 0.2
Min.
205
3.2
18
±2
1
Typ.
-9.1
220
120
9.1
30
Max.
+350
-100
0.44
-1.8
235
0.5
3.5
36
50
10
30
2
5
mA/V
mA/V
Unit
L292
kHz
mA
mV
mA
mA
V
V
V
V
A
V
V
V
V
A
A
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