SI9122 Datasheet, PDF (11/17 Pages) Vishay Siliconix – 500-kHz Half-Bridge DC-DC Converter With Integrated Secondary Synchronous Rectification Drivers

TYPICAL CHARACTERISTICS
F_OSC vs. R_OSC @ V_CC = 12 V
600
500
400
300
200
20
10.0
30
40
50
60
70
80
R_OSC (kW)
V_REG vs. Temperature, V_IN = 48 V
9.5
9.0
V_INDET u V_REF
TC = −11 mV/C
8.5
8.0
7.5
−50 −25 0
25 50 75 100 125 150
Temperature (_C)
I_SS vs. Temperature
25
V_CC = 13 V
23
V_CC = 12 V
21
19
V_CC = 10 V
17
15
−50 −25 0
25 50 75
Temperature (_C)
100 125
Document Number: 71815
S-41944—Rev. F, 18-Oct-04
Si9122
Vishay Siliconix
3.300
V_REF vs. Temperature, V_CC = 12 V
3.295
3.290
3.285
3.280
3.275
3.270
−50 −25
0
25
50
Temperature (_C)
75
100
SRL, SRH Duty Cycle vs. V_EP
100
90
3.6 V = V_INDET
80
70
4.8 V
60
7.2 V
50
40
V_CC = 12 V
30
20
10
0
0.0
0.5
1.0
1.5
2.0
V_EP (V)
V_SS vs. Temperature, V_CC = 12 V
8.20
8.15
8.10
8.05
TC = +1.25 mV/C
V_INDET u V_REF
8.00
7.95
7.90
−50 −25 0
25 50 75 100 125 150
Temperature (_C)
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