LT8310
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LT8310

100VIN Forward Converter Controller

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LTspice LT8310/LT1431 Demo Circuit - 81 Watt Isolated Nonsynchronous Forward Converter with Opto Feedback (10.8-26.4V to 54V @ 1.5A) Download 7.00KB LTspice LT8310/LT1431 Demo Circuit - 72 Watt Isolated Nonsynchronous Forward Converter with Opto Feedback (36-72V to 12V @ 6A) Download 7.00KB LTspice LT8310/LT1431 Demo Circuit - 92W Isolated Nonsynchronous Forward Converter with Opto Feedback (43-53V to 54V @ 1.7A) Download 8.00KB LTspice LT8310 - Switching Regulators Download 4.43 KB
Part Models 8
1ku List Price Starting From $3.60
Features
  • Input Voltage Range: 6V to 100V
  • Duty Mode Control Regulates an Isolated Output without an Opto
  • High Efficiency Synchronous Control
  • Short-Circuit (Hiccup Mode) Overcurrent Protection
  • Programmable OVLO and UVLO with Hysteresis
  • Programmable Frequency (100kHz to 500kHz)
  • Synchronizable to an External Clock
  • Positive or Negative Polarity Output Voltage Feedback with a Single FBX Pin
  • Programmable Soft-Start
  • Low Shutdown Current < 1μA
  • Available in FE20 TSSOP with HV Pin Spacing
Additional Details
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The LT8310 is a simple-to-use resonant reset forward converter controller that drives the gate of a low side N-channel MOSFET from an internally regulated 10V supply. The LT8310 features duty mode control that generates a stable, regulated, isolated output using a single power transformer. With the addition of output voltage feedback, via opto-coupler (isolated) or directly wired (nonisolated), current mode regulation is activated, improving output accuracy and load response. The flexibility to choose transformer turns ratio makes high step-down or step-up ratios possible without operating at duty cycle extremes.

The user can program the switching frequency from 100kHz to 500kHz to optimize efficiency, performance or external component size. A synchronous output is available for controlling secondary side synchronous rectification to improve efficiency. User programmable protection features include monitors on input voltage (UVLO and OVLO) and switch current (overcurrent limit). The LT8310 soft-start feature helps protect the transformer from flux saturation.

Applications

  • Industrial, Automotive and Military Systems
  • 48V Telecommunication Isolated Power Supplies
  • Isolated and Nonisolated DC/DC Converters
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file View Data Sheet
Documentation View All Documentation
LTspice LT8310/LT1431 Demo Circuit - 81 Watt Isolated Nonsynchronous Forward Converter with Opto Feedback (10.8-26.4V to 54V @ 1.5A) Download 7.00KB LTspice LT8310/LT1431 Demo Circuit - 72 Watt Isolated Nonsynchronous Forward Converter with Opto Feedback (36-72V to 12V @ 6A) Download 7.00KB LTspice LT8310/LT1431 Demo Circuit - 92W Isolated Nonsynchronous Forward Converter with Opto Feedback (43-53V to 54V @ 1.7A) Download 8.00KB LTspice LT8310 - Switching Regulators Download 4.43 KB
Part Models 8
1ku List Price Starting From $3.60
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LT8310

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Data Sheet

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UPDATED 08/11/2014
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LT8310: 100VIN Forward Converter Controller Data Sheet

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UPDATED 10/21/2014
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LT8310: 100V入力のフォワード・コンバータ・コントローラ データシート

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Reliability Data

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UPDATED 03/26/2018
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User Guide

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DC1963A - Demo Manual redirect icon

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Documentation

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

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LT8310EFE#PBF 20-Lead TSSOP w/ EP external-link
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LT8310EFE#TRPBF 20-Lead TSSOP w/ EP external-link
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LT8310HFE#PBF 20-Lead TSSOP w/ EP external-link
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LT8310HFE#TRPBF 20-Lead TSSOP w/ EP external-link
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LT8310IFE#PBF 20-Lead TSSOP w/ EP external-link
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LT8310IFE#TRPBF 20-Lead TSSOP w/ EP external-link
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LT8310MPFE#PBF 20-Lead TSSOP w/ EP external-link
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LT8310MPFE#TRPBF 20-Lead TSSOP w/ EP external-link
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Apr 6, 2022

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Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LT8310EFE#PBF

PRODUCTION

LT8310EFE#TRPBF

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LT8310HFE#TRPBF

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LT8310IFE#PBF

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Software & Part Ecosystem

Software & Part Ecosystem

Parts Product Life Cycle Description

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Evaluation Kit

Evaluation Kits 2

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DC1963A

LT8310EFE Demo Board | Isolated Forward Converter, 36V ≤ VIN ≤ 72V; VOUT = 12V @ 6A

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DC1963A

LT8310EFE Demo Board | Isolated Forward Converter, 36V ≤ VIN ≤ 72V; VOUT = 12V @ 6A

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DC1963A
LT8310EFE Demo Board | Isolated Forward Converter, 36V ≤ VIN ≤ 72V; VOUT = 12V @ 6A
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Product Detail

Demonstration circuit 1963A is a resonant reset forward converter featuring the LT8310 controller. This circuit was designed to demonstrate the high level of performance, and small solution size attainable using the LT8310. It operates at a 250kHz switching frequency, and regulates a 12V, 6A output from a 36V to 72V input source, making it well suited for telecom, industrial, and other applications. Table 1 summarizes the performance of the DC1963A.


Output regulation is handled on the secondary side by the LT1431, which is an adjustable shunt voltage regulator providing feedback to the primary side via an opto-coupler.

Resources

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DC1963A - Schematic Download

82.00K

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DC1963A - Demo Manual Download

762.00K

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DC1963A - Design Files Download

2.00M

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DC2015A

LT8310EFE/LT8311EFE Isolated Demo Board | 36V ≤ VIN ≤ 72V; VOUT = 12V @ 12A

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DC2015A

LT8310EFE/LT8311EFE Isolated Demo Board | 36V ≤ VIN ≤ 72V; VOUT = 12V @ 12A

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DC2015A
LT8310EFE/LT8311EFE Isolated Demo Board | 36V ≤ VIN ≤ 72V; VOUT = 12V @ 12A
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Product Detail

Demonstration circuit 2015A is a resonant reset forward converter with synchronous rectification featuring the LT8310/LT8311 chipset. This circuit was designed to demonstrate the high levels of performance, efficiency, and small solution size attainable using these parts. It operates at 240kHz and produces a regulated 12V, 12A output from an input voltage range of 36V to 72V: suitable for telecom, industrial, and other applications. It has an eighth-brick footprint area. Synchronous rectification helps to attain efficiency exceeding 94%.

Resources

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DC2015A - Demo Manual Download

503.00K

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DC2015A - Schematic Download

83.00K

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DC2015A - Design Files Download

2.00M

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Evaluation Kits2

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DC1963A

LT8310EFE Demo Board | Isolated Forward Converter, 36V ≤ VIN ≤ 72V; VOUT = 12V @ 6A
evaluation kit item images

DC2015A

LT8310EFE/LT8311EFE Isolated Demo Board | 36V ≤ VIN ≤ 72V; VOUT = 12V @ 12A
Tools & Simulations

Tools & Simulations 1

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

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LT8310/LT1431 Demo Circuit - 81 Watt Isolated Nonsynchronous Forward Converter with Opto Feedback (10.8-26.4V to 54V @ 1.5A) Download

7.00K

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LT8310/LT1431 Demo Circuit - 92W Isolated Nonsynchronous Forward Converter with Opto Feedback (43-53V to 54V @ 1.7A) Download

8.00K

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LT8310/LT1431 Demo Circuit - 72 Watt Isolated Nonsynchronous Forward Converter with Opto Feedback (36-72V to 12V @ 6A) Download

7.00K

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LT8310 - Switching Regulators Download

4.43 K

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