SI9122E Datasheet, PDF (15/20 Pages) Vishay Siliconix – 500-kHz Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification Drivers

TYPICAL CHARACTERISTICS
80
t_BBM1, V_CC = 13 V
70
t_BBM1, V_CC = 12 V t_BBM1, V_CC = 10 V
60
V_EP = 0 V
50
40
30
3.5
t_BBM2, V_CC = 10 V
t_BBM2, V_CC = 12 V ^{tBBM2, VCC = 13 V}
4.5
5.5
6.5
7.5
V_INDET (V)
t_{BBM1, 2} vs. V_CC vs. V_INDET, f_OSC < 200 kHz
80
V_EP = 0 V
LX = 48 V, BST = 60 V
70
t_BBM4, V_CC = 12 V
t_BBM4, V_CC = 10 V
60
t_BBM4, V_CC = 13 V
50
t_BBM3, V_CC = 12 V
t_BBM3, V_CC = 10 V
40
t_BBM3, V_CC = 13 V
30
3.5
4.5
5.5
6.5
7.5
V_INDET (V)
t_{BBM3, 4} vs. V_CC vs. V_INDET, f_OSC < 200 kHz
60
500
Frequency
50
40
30
20
10
0
0.0
D%
I_OUT
V_OUT
0.2
0.4
0.6
0.8
R_LOAD ( )
I_OUT vs. R_LOAD (V_IN = 72 V)
400
300
200
100
0
1.0
Document Number: 73866
S-80112-Rev. D, 21-Jan-08
Si9122E
Vishay Siliconix
55
t_BBM1, V_CC = 13 V
50
t_BBM1, V_CC = 12 V
t_BBM1, V_CC = 10 V
45
V_EP = 1.65 V
t_BBM2, V_CC = 12 V
40
t_BBM2, V_CC = 13 V
t_BBM2, V_CC = 10 V
35
3.5
4.5
5.5
6.5
7.5
V_INDET (V)
t_{BBM1, 2} vs. V_CC vs. V_INDET
65
t_BBM4, V_CC = 10 V
60
55
50
V_EP = 1.65 V
45
LX = 48 V, BST = 60 V
t_BBM4, V_CC = 12 V
t_BBM4, V_CC = 13 V
40
t_BBM3, V_CC = 12 V
t_BBM3, V_CC = 10 V
35
t_BBM3, V_CC = 13 V
30
3.5
4.5
5.5
6.5
7.5
V_INDET (V)
t_{BBM3, 4} vs. V_CC vs. V_INDET
50
500
45
Frequency
40
400
D%
35
30
300
25
DSR _L
D_DL
20
200
15
10
5
0
1
VROSC
2
3
4
100
0
5
VC _{L_CONT} (V)
V_ROSC, F_OSC, and Duty Cycle vs. V_{CL_CONT}
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15