SI9122 Datasheet, PDF (15/17 Pages) Vishay Siliconix – 500-kHz Half-Bridge DC-DC Converter With Integrated Secondary Synchronous Rectification Drivers

TYPICAL WAVEFORMS
Figure 7. Foldback Mode, R_L = 0.02 W
SRL 10 V/div
Si9122
Vishay Siliconix
Figure 8. Normal Mode, R_L = 0.1 W
SRL 10 V/div
I_OUT 5 A /div
D_L 10 V/div
CS2 50 mV/div
V_IN 2 V/div
2 ms/div
Figure 9. V_CC Ramp-Up
I_OUT 5 A /div
D_L 5 V/div
CS2 5 V/div
2 ms/div
Figure 10. Over Load Recovery—Minimum Overshoot
V_CL 2 V/div
V_EP 2 V/div
V_CC 2 V/div
2 ms/div
Figure 11. Effective BBM—Measured On Secondary
LX 20 V/div
SRH 2 V/div
SRL 2 V/div
I_OUT 10 A/div
V_OUT 2 V/div
DH 5 V/div
SRL 5 V/div
D_L 5 V/div
SRH 5 V/div
200 ms/div
Figure 12. Drive Waveforms
500 ns/div
500 ns/div
Vishay Siliconix maintains worldwide manufacturing capability. Products may be manufactured at one of several qualified locations. Reliability data for Silicon Technology and
Package Reliability represent a composite of all qualified locations. For related documents such as package/tape drawings, part marking, and reliability data, see
http://www.vishay.com/ppg?71815.
Document Number: 71815
S-41944—Rev. F, 18-Oct-04
www.vishay.com
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