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STCMB1 Datasheet(PDF) 54 Page - STMicroelectronics

Part # STCMB1
Description  TM PFC with X-cap discharge and LLC resonant combo controller
PDF  59 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STCMB1 Datasheet(HTML) 54 Page - STMicroelectronics

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STCMB1 layout hints
STCMB1
54/59
DocID028958 Rev 4
13. It is better do avoid the HVG trace under the IC, between pin rows (see Figure 33).
This layout solution should be avoided because the high dV/dt of the HV traces might
affect the low signal pins. It is a better practice using a suitable SMT package for the
bootstrap capacitor and route the HVG track below, as on the right side. The IC and
MOSFETs positioning like in the sketch here below on the left should be avoided
because the trace length cannot be minimized.
Figure 33. Critical (left) and preferred (right) MOSFETs and Cboot routing and
placement



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