U211B ATMEL Corporation, U211B Datasheet - Page 12

• Manufacturer Part Number: U211B
• Description: as U209B + Foldback
• Manufacturer: ATMEL Corporation

U211B
12 (21)
Figure 10. Soft-start charge current (f/V-converter non-active)
Figure 11. Soft-start charge current (f/V-converter active)
240
200
160
120
100
100
80
80
60
40
20
80
60
40
20
0
0
0
0
0
0
10nF
Reference Point Pin 16
Reference Point Pin 16
0.2
Figure 9. Ramp control
2
2
4.7nF
0.4
4
4
R
V
V
ö
13
13
Reference Point Pin 2
( MW )
( V )
( V )
0.6
2.2nF
6
6
C
ö
/t
0.8
=1.5nF
8
8
1.0
10
10
Figure 12. Soft-start voltage (f/V-converter non-active)
Figure 13. Soft-start voltage (f/V-converter active)
10
10
10
8
6
4
2
0
8
6
4
2
0
8
6
4
2
0
Reference Point Pin 16
Reference Point Pin 16
Figure 14. Soft-start function
Motor Standstill ( Dead Time )
Motor in Action
Reference Point Pin 16
t=f
t=f
t=f
(C3)
(C3)
(C3)
Rev. A4, 03-Aug-01