LT6109IMS-1#TRPBF Linear Technology, LT6109IMS-1#TRPBF Datasheet - Page 25

• Manufacturer Part Number: LT6109IMS-1#TRPBF
• Manufacturer: Linear Technology

Specifications of LT6109IMS-1#TRPBF

• Lead Free Status / Rohs Status: Compliant

TYPICAL APPLICATIONS
TYPICAL APPLICATIONS
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
The LTC6993-1 provides a 10µS reset pulse to the LT6109-1.
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
30.1k
IS DISCONNECTED
DISCHARGES C1
R8
WHEN SUPPLY
RESET
OPTIONAL:
Q1
2N2222
SENSEHI SENSELO
V
EN/RST
OUTC2
OUTC1
+
5V
LT6109
V
R7
1M
–
C1
0.1µF
OUTA
INC2
INC1
CREATES A DELAYED
10µs RESET PULSE
Power-On Reset or Disconnect Using a TimerBlox
R6
487k
ON START-UP
TRIG
GND
SET
LTC6993-3
CURRENT SET POINT (0V TO 5V)
100
678
200
OUT
DIV
V
+
100
Simplified DC Motor Torque Control
5V
0.47µF
R4
10k
V
R5
10k
OUT
R
100k
100k
SENSE
I
100
LOAD
R
IN
1M
10
1
3
4
2
feedback to a difference amplifier that controls the current
in the motor. The LTC
of the difference amp to the motors PWM control signal.
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.
LT6109-1
SENSEHI
SENSELO
OUTC2
OUTC1
EN/RST
2
3
–
+
1M
4
7
78.7k
LTC6246
6
–
+
1
3
MOD
LTC6992-1
SET
V
V
V
V
V
V
+
+
–
+
–
+
®
5
GND
9
V
5V
V
–
Circuit
+
2
OUT
5
DIV
+
–
+
–
LT6109-1/LT6109-2
DC MOTOR
(0A TO 5A)
RS-540SH
BRUSHED
®
MABUCHI
6
4
6992 is used to convert the output
100k
1M
0.1
610912 TA04
REFERENCE
V
400mV
MOTOR
280k
IRF640
5V
610912 TA06
1N5818
OUTA
INC2
INC1
V
V
+
–
100µF
8
7
6
R1
8.06k
R2
1.5k
R3
499
25
610912f