Texas SM74611KTTR-Smart Bypass Diode

SM74611KTTR Overview

The SM74611 is designed for use as a bypass diode in photovoltaic modules. The SM74611 uses a charge pump to drive an N-channel FET to provide a resistive path for the bypass current to flow.

 

SM74611KTTR 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.

 

 

 

SM74611KTTR Features

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

 

SM74611KTTR Applications

Bypass Diodes for Photovoltaic Panels

Bypass Diodes for Microinverter and Power Optimizer

 

SM74611KTTR Pin Configuration

 

SM74611KTTR Functional Block Diagram

SM74611KTTR Product Parameter

Manufacturer	Texas	Manufacturer's Part #	SM74611KTTR
Categories	Discrete Semiconductor Products	Sub-Categories	Diodes - Rectifiers - Single
Part Status	Active	Diode Type	Standard
Voltage - DC Reverse (Vr) (Max)	30V	Current - Average Rectified (Io)	15A
Voltage - Forward (Vf) (Max) @ If	26mV @ 8A	Speed	Standard Recovery >500ns, > 200mA (Io)
Reverse Recovery Time (trr)	-	Current - Reverse Leakage @ Vr	300nA @ 28V
Capacitance @ Vr, F	-	Mounting Type	Surface Mount
Package / Case	TO-263-3, D2Pak (2 Leads + Tab), TO-263AB	Supplier Device Package	DDPAK/TO-263-3
Operating Temperature - Junction	-40°C~125°C	Factory Lead Time	6 Weeks
Diode Element Material	SILICON	Packaging	Tape & Reel (TR)
Pbfree Code	yes	Number of Terminations	2
Terminal Finish	Matte Tin (Sn)	Terminal Form	GULL WING
Peak Reflow Temperature (Cel)	245	Number of Elements	1
RoHS Status	ROHS3 Compliant	Mount	Surface Mount
Number of Pins	3	Case Connection	CATHODE
Max Reverse Voltage (DC)	30V	Average Rectified Current	15A
Max Operating Temperature	125°C	Min Operating Temperature	-40°C
Base Part Number	SM74611	Element Configuration	Single
Forward Current	8A	Peak Reverse Current	300nA
Max Repetitive Reverse Voltage (Vrrm)	28V	Reverse Voltage	28V
Height	4.83mm	Radiation Hardening	No
Weight	1.946308g	Subcategory	Rectifier Diodes
Max Power Dissipation	575mW	Output Current	15A
Max Junction Temperature (Tj)	125°C	Length	10.18mm
Width	8.41mm	Lead Free	Contains Lead
Application	GENERAL PURPOSE	Number of Phases	1
Lifecycle Status	ACTIVE (Last Updated: 3 days ago)	Max Supply Voltage	30V
Min Supply Voltage	100mV	Operating Supply Current	0A
Quiescent Current	0A	Nominal Input Voltage	30V
Number of Drivers	1	Thickness	4.44mm

 

SM74611KTTR Manufacturer

Texas Instruments is a semiconductor multinational company in Texas, USA. It is famous for developing, manufacturing, and selling semiconductor and computer technology. It is mainly engaged in innovative digital signal processing and analog circuits. In addition to the semiconductor business, it also provides solutions including sensing and control, educational products and digital light source processing. Texas Instruments (TI) is headquartered in Dallas, Texas, USA, and has manufacturing, design or sales organizations in more than 25 countries.