隔离开关稳压器四通道隔离器adum4470/adum4471/adum4472/adum4473/adum4474数据表

　　The ADuM4470/ADuM4471/ADuM4472/ADuM4473/ ADuM44741 are quad-channel， digital isolators with a regulated dc-to-dc isolated power supply controller and an internal MOSFET driver. The dc-to-dc controller has an internal isolated PWM feedback from the secondary side， based on the iCoupler® chip scale transformer technology and complete loop compensation. This eliminates the need to use an optocoupler for feedback and compensates the loop for stability. The ADuM447x isolators provide a more stable output voltage and higher efficiency compared to unregulated isolated dcto-dc power supplies. The fully integrated feedback and loop compensation in a wide-body SOIC package provide a smaller form factor and 8.3 mm creepage distance solution. The regulated feedback provides a relatively flat efficiency curve over the full output power range. The ADuM447x enable a dcto-dc converter with a 3.3 V to 24 V isolated output voltage range from either a 5.0 V or a 3.3 V input voltage， with an output power of up to 2.5 W. The ADuM447x isolators provide four independent isolation channels in a variety of channel configurations and data rates. （The x in ADuM447x throughout this data sheet stands for the ADuM4470/ADuM4471/ADuM4472/ADuM4473/ADuM4474.）