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Product details

Parameters

Vin (Min) (V) 0.5 Vin (Max) (V) 100 Iq (Typ) (mA) 0 Iq (Max) (mA) 0 Features Solar Bypass, Internal FET Operating temperature range (C) -40 to 125 IReverse (Typ) (uA) 3.3 VSense reverse (Typ) (mV) Design support Simulation Model Rating Catalog Channel(s) controlled (#) 1 FET Internal open-in-new Find other Ideal diode/ORing controllers

Package | Pins | Size

TO-263 (KTT) 3 155 mm² 10.16 x 15.24 open-in-new Find other Ideal diode/ORing controllers

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
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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.

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Technical documentation

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No results found. Please clear your search and try again. View all 7
Type Title Date
* Datasheet SM74611 Smart Bypass Diode datasheet (Rev. B) May 27, 2016
White papers 11 Ways to Protect Your Power Path white paper Jul. 03, 2019
Application notes Basics of Ideal Diodes May 09, 2019
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Technical articles How and why you should use load switches for power sequencing Feb. 06, 2018
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Technical articles Don’t leave it floating! Power off your outputs with quick output discharge Dec. 09, 2016

Design & development

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Design tools & simulation

SIMULATION MODELS Download
SNVM105A.ZIP (20 KB) - PSpice Model
SIMULATION MODELS Download
SNVM433.TSC (584 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SNVM434.ZIP (7 KB) - TINA-TI Spice Model
SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
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  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
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Reference designs

REFERENCE DESIGNS Download
4-Channel LED Spotlight Driver Reference Design
PMP10171 The PMP10171 reference design is a boost LED driver with four outputs. It has an input voltage range of 10 .. 30V and provides 500mA at 40V maximum. A microcontroller provides an adjustable PWM signal for adjusting the brightness of the LEDs.
document-generic Schematic document-generic User guide

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DDPAK/TO-263 (KTT) 3 View options

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