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參數(shù)資料
| 型號： | L6515 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 運(yùn)動控制電子 |
| 英文描述： | BRUSH DC MOTOR CONTROLLER, 0.01 A, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁數(shù)： | 6/13頁 |
| 文件大?。?/td> | 4687K |
| 代理商： | L6515 |
SYSTEM DESCRIPTION
The L6515 is intended to be used as a microproc-
essor controlled positioning system.
For the motor driver stage only digital operating
bridges are needed like L293E, L298, L6203, L6202.
The system operates in two modes to achieve
high-speed, high-accurancy positioning.
Speed commands for the system originate in the
microprocessor. It is continuously updated on the
motor position by means of pulses from the con-
troller chip, which in turn gets its information from
the encoder. From this basic input, the microproc-
essor computes a 6-bit control word that sets the
system speed and direction dependent on the dis-
tance to travel.
When the motor is stopped and the microproces-
sor orders it to a new position, the system oper-
ates initially in an open-loop configuration as
there is no feedback from the tachometer gener-
ator. Therefore maximum current is fed to the mo-
tor. As maximum speed is reached, the tachome-
ter chip output backs off the processors signal
thus reducing accelerating torque. The motor con-
tinues to run at top speed but under closed-loop
control.
As a target position is approached, the microproc-
essor lowers the value of the speed-demand
word; this reduces the voltage at the main sum-
ming point, in effect braking the motor. The brak-
ing is applied progressively until the motor is run-
ning at minimum speed.
At that time, the microprocessor orders a switch
to the position mode, and within 3 to 4ms the
power stage drives the motor to a null position,
where it is held by electronic "detening".
Symbol
Parameter
Value
Unit
VS
Supply Voltage
12
V
VIA
Analog Inputs Voltage
-0.3 to 7
V
VIL
Logic Inputs Voltage
-0.3 to 7
V
VO
Open Collector Output Current
12
V
IO
Open Collector Current
10
mA
IZ
Zener Current
20
mA
Tstg, Tj
Storage Temperature
-40 to 150
°C
Tamb
Operative Ambient Temperature
0 to 70
°C
ABSOLUTE MAXIMUM RATINGS
PIN CONNECTION (top view)
LA
I
L6515
2/13
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