+12V

-12V

R

M

R = 12W

M

dc

Motor

R

2

10kW

R

1

1kW

R

SET

V

IN

EMF

R

S

1W

OPA564

V

DIG

(1)

C

0.1 F

1

m

C

0.1 F

1

m

C

47 F

2

m

C

47 F

2

m

R

5k

3

W

Z

2

S

2

Z

1

S

1

(2)

(2)

(3)

(3)

Note (4)

Note (4)

V+

V-

V

DIG

10kW

4.7V

Zener

1N4732A

(a)

(b)

2

5

1

4

3

IN

C

1000 F

m

I1

C

100nF

I2

C

22 F

m

OUT

I

IN

I

RO

V

RD

V

OUT

I

OUT

R

EXT

5kW

V

IN

I

D,c

I

D,d

I

GND

V

D

C

D

47nF

DELAY

GND

RESET

OUT

TLE4275-Q1

OPA564

www.ti.com

SBOS372E

– OCTOBER 2008 – REVISED JANUARY 2011

(1) IFLAG and TFLAG connections are not shown.

(2) Z1, Z2 = zener diodes (IN5246 or equivalent). Select Z1 and Z2 diodes that are capable of the maximum anticipated surge current.

(3) S1, S2 = Schottky diodes (STPS1L40 or equivalent).

(4) C1 = high-frequency bypass capacitors; C2 = low-frequency bypass capacitors (minimum of 10mF for every 1A peak current).

Figure 55. DC Motor Speed Controller (without Tachometer)

Figure 56. Circuits for Generating VDIG

© 2008–2011, Texas Instruments Incorporated

Submit Documentation Feedback

27

Product Folder Link(s): OPA564