ADuM4471 Datasheet Text
Isolated Switching Regulator with Quad-Channel Isolators
Data Sheet ADuM4470/ADuM4471/ADuM4472/ADuM4473/ADuM4474
Features
Isolated PWM feedback with built in pensation Primary side transformer driver for up to 2.5 W output power with 5 V input voltage Regulated adjustable output: 3.3 V to 24 V Up to 80% efficiency Quad dc-to-25 Mbps (NRZ) signal isolation channels 200 kHz to 1 MHz adjustable oscillator Soft start function at power-up Pulse-by-pulse overcurrent protection Thermal shutdown 5000 V rms isolation High mon-mode transient immunity: >25 kV/μs 20-lead SOIC package with 8.3 mm creepage High temperature operation: 105°C
APPLICATIONS
Power supply start-up bias and gate drives Isolated sensor interfaces Process controls RS-232/RS-422/RS-485 transceivers
VDD1
VDDA I/OA I/OB I/OC I/OD
FUNCTIONAL BLOCK DIAGRAM
RECT
VISO
VREG
ADuM4470/
ADuM4471/
ADuM4472/
ADuM4473/ ADuM4474
PRIMARY
REG
CONTROLLER/ DRIVER
SECONDARY CONTROLLER
INTERNAL
FEEDBACK
VDD2 5V
FB...