1 Features
• Input operating voltage range: 5V to 80V
– 100V absolute maximum
• 4× integrated gate drive control
• 165μA gate pull-up strength
• 100mA gate pull-down strength
• Linear gate regulation control for supply ORing
applications
– VTG_REG = 11mV
• Enable pin for user-controlled device on/off
function
• –40°C to 125°C operating junction temperature
range
• Small footprint: 3mm × 3mm VQFN-12
– Meets IPC-9592 spacing rules

2 Applications
• Video door bell
• IP cameras
• Thermostat
• Power distribution systems (24Vac)
• Polarity agnostic power inputs

3 Description
The LM74680 is an ideal diode bridge controller
that provides voltage rectification by driving four
N-channel MOSFETs in a full-bridge configuration.
LM74680 enables lower voltage drop and reduced
power dissipation as compared to conventional diode
bridge rectifiers. This helps to simplify the power
supply design, eliminate heat sinks, and reduce PCB
area. The integrated charge pump allows use of
N-channel MOSFETs, which are smaller and more
cost-effective than P-channel MOSFETs for the same
power level. It also offers fast response to reverse
current conditions for protection against input short
events. The LM74680 has an enable pin which allows
for the gate driver to be either enabled or disabled
by an external signal. The LM74680 supports voltage
rectification from DC to 1kHz.
This device is characterized for operation over a
junction temperature range of –40°C to +125°C.