L6229 STMicroelectronics, L6229 Datasheet - Page 15

• Manufacturer Part Number: L6229
• Description: DMOS DRIVER FOR THREE-PHASE BRUSHLESS DC MOTOR
• Manufacturer: STMicroelectronics

Figure 18. Tachometer Speed Control Loop.
Figure 19. t
PULSE
versus C
V
REF
PUL
1 . 10
1 . 10
100
10
C
4
3
REF2
1
and R
R
3
C
R
1
4
PUL
V
R
DD
PUL
.
R
DD
= 20kΩ
R
1
R
PUL
R
R
2
PUL
Cpul [nF]
RCPULSE
= 47kΩ
10
TACHO
VREF
C
C
R
REF1
PUL
PUL
H
1
= 100kΩ
MONOSTABLE
TACHO
100
L6229
15/25