Smart bypass diode SM74611

SM74611 Smart Bypass Diode
1
1 Features
1• Maximum Reverse Voltage (VR) of 30 V
• Operating Forward Current (IF) of up to 15 A
• Low Average Forward Voltage (26 mV at 8 A)
• Less Power Dissipation than Schottky Diode
• Lower Leakage Current than Schottky Diode
• Footprint and Pin-Compatible With Conventional
D2PAK Schottky Diode
• Operating Range (TJ
) of –40°C to 125°C
2 Applications
• Bypass Diodes for Photovoltaic Panels
• Bypass Diodes for Microinverter and Power
Optimizer
3 Description
The SM74611 device is a smart bypass diode used in
photovoltaic applications. The SM74611 device
serves the purpose of providing an alternate path for
string current when parts of the panel are shaded
during normal operation. Without bypass diodes, the
shaded cells will exhibit a hot spot which is caused by
excessive power dissipation in the reverse biased
cells.
Currently, conventional P-N junction diodes or
Schottky diodes are used to mitigate this issue.
Unfortunately the forward voltage drop for these
diodes is still considered high (approximately 0.6 V
for normal diodes and 0.4 V for Schottky). With 10 A
of currents flowing through these diodes, the power
dissipation can reach as high as 6 W. This in turn will
raise the temperature inside the junction box where
these diodes normally reside and reduce module
reliability.
The advantage of the SM74611 is that it has a lower forward voltage drop than P-N junction and Schottky diodes. It has a typical average forward voltage drop
of 26 mV at 8 A of current. This translates into typical
power dissipation of 208 mW, which is significantly
lower than the 3.2 W of conventional Schottky diodes.
The SM74611 is also footprint and pin compatible
with conventional D2PAK Schottky diodes, making it
a drop-in replacement in many applications.

1 stuks 2 eur
10 stuks 15 eur
100 stuks 130 eur