SI9122 Vishay Siliconix, SI9122 Datasheet - Page 14

• Manufacturer Part Number: SI9122
• Description: 500-kHz Half-Bridge DC-DC Converter With Integrated Secondary Synchronous Rectification Drivers
• Manufacturer: Vishay Siliconix

Si9122
Vishay Siliconix
www.vishay.com
14
TYPICAL CHARACTERISTICS
80
70
60
50
40
30
80
70
60
50
40
30
60
50
40
30
20
10
0
3.5
3.5
0.0
t
BBM3
V
V
EP
EP
= 13 V
0.2
= 0 V
= 0 V
V
I
t
t
OUT
4.5
4.5
OUT
BBM1, 2
BBM3, 4
t
t
BBM3
BBM1
I
vs. R
t
OUT
BBM2
Frequency
0.4
vs. V
vs. V
= 12 V
= 10 V
V
t
V
R
BBM4
LOAD
t
= 12 V
INDER
BBM2
INDER
LOAD
5.5
t
5.5
BBM4
CC
CC
D%
= 10 V
(V
= 10 V
(V)
(W)
(V)
vs. V
vs. V
0.6
IN
= 13 V
= 7.2 V)
INDET
INDET
6.5
6.5
t
t
t
BBM1
BBM1
t
BBM2
BBM3
0.8
= 13 V
= 10 V
= 13 V
t
= 12 V
BBM4
= 12 V
7.5
7.5
1.0
500
400
300
200
100
0
55
50
45
40
35
65
60
55
50
45
40
35
30
50
45
40
35
30
25
20
15
10
5
0
3.5
3.5
1
V
t
BBM2
t
BBM4
Current Sense Duty Cycle vs. V
V
EP
t
EP
BBM3
= 1.65 V
= 1.65 V
= 10 V
= 10 V
t
t
4.5
4.5
= 10 V
BBM1, 2
BBM3, 4
2
V
D
Frequency
INDET
SRL
t
vs. V
BBM2
vs. V
V
V
V
t
CLCONT
BBM3
V
INDER
INDER
= 7.2 V 25_C
ROSC
5.5
5.5
= 12 V
INDET
INDET
3
= 12 V
(V)
(V)
D%
(V)
vs. V
vs. V
D
t
DL
BBM1
t
t
t
t
t
BBM1
BBM1
BBM2
BBM4
BBM4
S-41944—Rev. F, 18-Oct-04
CC
6.5
CC
6.5
t
4
Document Number: 71815
BBM3
= 13 V
CLCONT
= 12 V
= 10 V
= 13 V
= 12 V
= 13 V
= 13 V
7.5
7.5
5
500
400
300
200
100
0