L292_03 STMICROELECTRONICS [STMicroelectronics], L292_03 Datasheet - Page 11

• Manufacturer Part Number: L292_03
• Description: SWITCH-MODE DRIVER FOR DC MOTORS
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Example :
a) Data
– Motors characteristics:
– Voltage and current characteristics:
– Closed loop bandwidth : 3 kHz
b) Calculation
From relationship (4) :
and from (1) :
RC = 1 msec [from expression (2) ]
Assuming
The cutoff frequency is :
c) Summarising
R
G
f
T
2
S
m o
LM = 5 mH
RM = 5 W
LM / RM = 1msec
V
=
=
s
=
= 20 V
143 10
------------------------- -
=
1
-- -
2
0.044
-------------- - V
R
--------------- -
R
I
=
M
2V
F
M
C
------------------------------- -
4R
V
= 1/
S
F
– C = 1.10
–
–
R
–
F
I
400 C
R
1000 C
----------------- - = 1
R
3
R
C
I
=
=
F
M
F
=
F
C
C
0.2
1
= 2 A
2
F
3 kHz
F
0.2
; from (7) follows :
–
1
47 s
–
3
sec
V
I







= 9.1 V
C = 47nF
R = 22 K
For R
F
= 510
C
F
= 92nF
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