Obsolete Product(s) - Obsolete Product(s)
3/13
L292
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 Parameter Test Condition Min. Typ. Max. Unit
V
S
Supply Voltage 18 36 V
I
d
Quiescent Drain Current V
S
= 20V (offset null) 30 50 mA
V
os
Input Offset Voltage (pin 6) I
o
= 0 +350 mV
V
inh
Inhibit Low Level (pin 12, 13) 2 V
Inhibit High Level 3.2 V
I
inh
Low Voltage Condition V
inh
(L) = 0.4V -100 µA
High Voltage Condition V
inh
(H) = 3.2V 10 µA
I
i
Input Current (pin 6) V
I
= -8.8V -1.8 mA
V
I
= +8.8V 0.5 mA
V
i
Input Voltage (pin 6) R
s1
= R
s2
= 0.2Ω
I
o
= 2A
I
o
= -2A
9.1
-9.1
V
V
I
o
Output Current VI = ±9.8V
s1
= R
s2
= 0.2Ω ±2 A
V
D
Total Drop Out Voltage Including sensor resistor
I
o
= 2A
I
o
= 1A
5
3.5
V
V
V
RS
Sensing Resistor Voltage Drop T
j
= 150°C I
o
= 2A 0.44 V
Transconductance R
s1
= R
s2
= 0.2Ω 205 220 235 mA/V
R
s1
= R
s2
= 0.42Ω 120 mA/V
f
osc
Frequency range (pin 10) 1 30 kHz
I
o
V
i
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