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L6738 Datasheet(PDF) 19 Page - STMicroelectronics

No. de pieza L6738
Descripción Electrónicos  Single-phase PWM controller with light-load efficiency optimization
PDF  32 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6738 Datasheet(HTML) 19 Page - STMicroelectronics

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L6738
Main oscillator
Doc ID 18133 Rev 1
19/32
7.1
Synchronization
The L6738 provides the user with the possibility to synchronize to an external signal when
properly connected to the SYNCH pin. Synchronization allows different converters to share
the same input filter reducing the resulting IRMS and so reducing the total capacitor count
required to sustain the load. Furthermore, synchronized systems generally exhibit higher
noise immunity and better regulation.
The device synchronizes the high-side MOSFET turn-on with the falling-edge of the synch
signal locking the internal sawtooth generator to the external signal.



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