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Document Number: 73192

S09-1455-Rev. B, 03-Aug-09

Vishay Siliconix

SiP12501

TYPICAL WAVEFORMS

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

Figure 2. PWM Dimming Control

200 Hz 50 % Duty Cycle PWM Signal on XSHD Pin

0.5 V/div

1 V/div

0.2 V/div

1 ms/div

Four LEDs in series

0.5 µs/div

2 V/div

50 mV/div

ac coupled

20 mV/div

ac coupled

Figure 3. Startup

100 ms/div

0.5 V/div

2 V/div