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參數(shù)資料
| 型號： | LT6109IMS-1#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO10 |
| 封裝： | LEAD FREE, PLASTIC, MSOP-10 |
| 文件頁數(shù)： | 18/28頁 |
| 文件大小： | 370K |
| 代理商： | LT6109IMS-1#PBF |
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LT6109-1/LT6109-2
25
610912f
TYPICAL APPLICATIONS
Power-On Reset or Disconnect Using a TimerBlox Circuit
Simplified DC Motor Torque Control
The figure shows a simplified DC motor control circuit.
The circuit controls motor current, which is proportional
to motor torque; the LT6109 is used to provide current
feedback to a difference amplifier that controls the current
in the motor. The LTC6992 is used to convert the output
of the difference amp to the motors PWM control signal.
SENSEHI SENSELO
OUTA
LT6109
V–
100
100k
1M
2
3
7 LTC6246
4
6
1
3
6
IRF640
5V
1N5818
0.1
VMOTOR
5
4
2
0.47F
VOUT
CURRENT SET POINT (0V TO 5V)
678
200
INC2
1M
610912 TA04
100k
100
78.7k
100k
280k
INC1
V+
EN/RST
OUTC1
OUTC2
RESET
100F
+
–
LTC6992-1
V+
GND
5V
BRUSHED
DC MOTOR
(0A TO 5A)
MABUCHI
RS-540SH
MOD
SET
OUT
DIV
–
+
–
+
V–
V+
V–
–
+
V–
5
INC1
610912 TA06
V+
V–
V+
400mV
REFERENCE
V+
RIN
100
RSENSE
ILOAD
R5
10k
INC2
OUTA
6
7
8
9
SENSEHI
LT6109-1
5V
SENSELO
OUTC2
OUTC1
EN/RST
10
1
3
4
2
R1
8.06k
R2
1.5k
R3
499
R4
10k
R7
1M
R6
487k
R8
30.1k
TRIG
C1
0.1F
Q1
2N2222
OUT
GND
V+
SET
DIV
LTC6993-3
5V
CREATES A DELAYED
10s RESET PULSE
ON START-UP
OPTIONAL:
DISCHARGES C1
WHEN SUPPLY
IS DISCONNECTED
TheLTC6993-1providesa10SresetpulsetotheLT6109-1.
The reset pulse is delayed by R7 and C1 whose time
constant must be greater than 10ms and longer than the
supply turn-on time. Optional components R8 and Q1
discharge capacitor C1 if the supply and/or ground are
disconnected. When power is restored C1 must recharge
and the LT6109-1 is issued another reset pulse.
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