NCP4318 Series

Dual Channel Synchronous Rectification Controller

Catalog

Dual Channel Synchronous Rectification Controller

Part	Mounting Type	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Supply [Max]	Current - Supply	Supplier Device Package	Applications	Package / Case	Package / Case [y]	Package / Case [x]	Voltage - Input [Max]	Voltage - Input [Min]	Voltage - Input	Package / Case	Package / Case
ON Semiconductor NCP4318AHJDR2G	Surface Mount	-40 °C	125 ¯C	35 V	8 mA	8-SOIC	Resonant Converter Controller	8-SOIC	3.9 mm	0.154 in	180 V	-700 mV
ON Semiconductor NCP4318ALKDR2G	Surface Mount	-40 °C	125 ¯C	35 V	8 mA	8-SOIC	Resonant Converter Controller	8-SOIC	3.9 mm	0.154 in	180 V	-700 mV
ON Semiconductor NCP4318AHDDR2G	Surface Mount	-40 °C	125 ¯C	35 V	8 mA	8-SOIC	Resonant Converter Controller	8-SOIC	3.9 mm	0.154 in			180 V
ON Semiconductor NCP4318ALGPDR2G	Surface Mount	-40 °C	125 ¯C	35 V	8 mA	8-SOIC-EP	Resonant Converter Controller	8-SOIC			180 V	-700 mV		0.154 in	3.9 mm
ON Semiconductor NCP4318ALFPDR2G	Surface Mount	-40 °C	125 ¯C	35 V	8 mA	8-SOIC-EP	Resonant Converter Controller	8-SOIC			180 V	-700 mV		0.154 in	3.9 mm

Catalog

Dual Channel Synchronous Rectification Controller

Key Features

• Adaptive dead time control

• Current inversion detection

• Adaptive gate voltage control

• 200V rated drain sensing pins for two channel MOSFET control

Description

NCP4318 is a mixed mode, which uses instantaneous drain voltage and previous dead time information, Synchronous Rectification (SR) controller for LLC resonant converter with minimum external components. The adaptive dead time control compensates induced parasitic inductance voltage to maximize SR MOSFET conduction and the efficiency. Multi-step turn-off threshold control and SR current inversion detection function prevent inversion current during fast load transient and allows stable SR operation over entire load range. In addition, to improve light load efficiency, VGATE is adaptively reduced from 10V to 6V/5V.