SI9122 Datasheet, PDF (14/17 Pages) Vishay Siliconix – 500-kHz Half-Bridge DC-DC Converter With Integrated Secondary Synchronous Rectification Drivers

Si9122
Vishay Siliconix
TYPICAL CHARACTERISTICS
t_{BBM1, 2} vs. V_CC vs. V_INDET
80
t_BBM1 = 13 V
70
t_BBM1 = 12 V
t_BBM1 = 10 V
60
V_EP = 0 V
50
40
30
3.5
t_BBM2 = 10 V
t_BBM2 = 12 V
t_BBM2 = 13 V
4.5
5.5
6.5
7.5
V_INDER (V)
t_{BBM3, 4} vs. V_CC vs. V_INDET
80
V_EP = 0 V
70
t_BBM4 = 10 V
60
t_BBM4 = 12 V
t_BBM4 = 13 V
50
t_BBM3 = 10 V
t_BBM3 = 12 V
40
t_BBM3 = 13 V
30
3.5
4.5
5.5
6.5
7.5
V_INDER (V)
I_OUT vs. R_LOAD (V_IN = 7.2 V)
60
Frequency
50
D%
40
30
20
I_OUT
10
V_OUT
0
0.0
0.2
0.4
0.6
0.8
R_LOAD (W)
www.vishay.com
14
500
400
300
200
100
0
1.0
t_{BBM1, 2} vs. V_INDET vs. V_CC
55
t_BBM1 = 13 V
50
t_BBM1 = 12 V
t_BBM1 = 10 V
45
V_EP = 1.65 V
t_BBM2 = 12 V
40
t_BBM2 = 13 V
t_BBM2 = 10 V
35
3.5
4.5
5.5
6.5
7.5
V_INDER (V)
t_{BBM3, 4} vs. V_INDET vs. V_CC
65
t_BBM4 = 10 V
60
t_BBM4 = 12 V
55
t_BBM4 = 13 V
50
V_EP = 1.65 V
45
40
t_BBM3 = 10 V
t_BBM3 = 12 V
t_BBM3 = 13 V
35
30
3.5
4.5
5.5
6.5
7.5
V_INDER (V)
Current Sense Duty Cycle vs. V_CLCONT
V_INDET = 7.2 V 25_C
50
500
45
Frequency
40
400
D%
35
30
300
25
D_SRL
D_DL
20
200
15
10
100
5
V_ROSC
0
0
1
2
3
4
5
V_CLCONT (V)
Document Number: 71815
S-41944—Rev. F, 18-Oct-04