L292 데이터 시트보기 (PDF) - STMicroelectronics

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L292

SWITCH-MODE DRIVER FOR DC MOTORS

STMicroelectronics 

L292

ELECTRICAL CHARACTERISTCS

Symbol

Parameter

VS Supply Voltage

Id

Quiescent Drain Current

Vos Input Offset Voltage (pin 6)

Vinh Inhibit Low Level (pin 12, 13)

Inhibit High Level

Iinh Low Voltage Condition

High Voltage Condition

Ii

Input Current (pin 6)

Vi

Input Voltage (pin 6)

Io

Output Current

VD Total Drop Out Voltage

VRS Sensing Resistor Voltage Drop

-I--o-

Transconductance

Vi

fosc Frequency range (pin 10)

Test Condition

VS = 20V (offset null)

Io = 0

Vinh(L) = 0.4V

Vinh(H) = 3.2V

VI = -8.8V

VI = +8.8V

Rs1 = Rs2 = 0.2Ω

Io = 2A

Io = -2A

VI = ±9.8V s1 = Rs2 = 0.2Ω

Including sensor resistor

Io = 2A

Io = 1A

Tj = 150°C Io = 2A

Rs1 = Rs2 = 0.2Ω

Rs1 = Rs2 = 0.42Ω

Min. Typ. Max. Unit

18

36

V

30

50

mA

+350 mV

2

V

3.2

V

-100 µA

10

µA

-1.8 mA

0.5

mA

9.1

V

-9.1

V

±2

A

5

V

3.5

V

0.44

V

205 220 235 mA/V

120

mA/V

1

30

kHz

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

3/13

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