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OUT
RAMP*
CTRL
CLF
CLK
UVLOand
REFOK*
*
-Internalsignals
PWM*
Startup(3) SteadyState(4) CurrentLimit(5)
CS
(2)(1)
UCD8220
SLUS652D – MARCH 2005 – REVISED OCTOBER 2006
Figure 30. UCD8220 Timing and Circuit Operation Diagram
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Product Folder Link(s): UCD8220