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Home Electronics News

100V No-Opto Flyback Regulator Operates at 150°C Delivering up to 24W & Producing Up to a 1kV Output Voltage

Electronics Maker by Electronics Maker
March 6, 2017
in Electronics News
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LT8304MILPITAS, CA – March 6, 2017 – Linear Technology Corporation announces the H-grade versions of the LT8304/-1, monolithic flyback regulators with guaranteed operation for junction temperatures as high as 150°C. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no opto-coupler or third winding for regulation. The LT8304 operates over a 3V to 100V input voltage range, has a 2A/150V integrated DMOS power switch and delivers up to 24W of output power, making it well suited for a wide variety of automotive, industrial, medical and military applications. The new LT8304-1 version is tailored for high output voltages up to 1kV.

These devices operate in boundary mode, which is a variable frequency current mode control switching scheme, typically resulting in better than ±5% output voltage regulation over the full line, load and temperature range. Boundary mode enables the use of a smaller transformer compared to equivalent continuous conduction mode designs. Several off-the-shelf transformers, identified in the data sheet, can be used for numerous applications. The high level of integration and the use of low ripple Burst Mode® operation result in a simple to use, low component count and high efficiency solution for isolated power delivery.

Additional features include output short-circuit protection, 116µA no load operating quiescent current, accurate enable and undervoltage lockout with hysteresis, internal soft-start and loop compensation, along with output diode temperature compensation.

The LT8304H/-1 operates over a –40°C to 150°C junction temperature range and is available in a small thermally enhanced SO-8 package. Pricing starts at $3.55 each in 1000-piece quantities. For more information, visit www.linear.com/product/LT8304.

Summary of Features: LT8304H/-1

  • VIN Range from 3V to 100V
  • Up to 24W of Output Power
  • LT8304-1 Capable of Output Voltages Up to 1kV
  • Onboard 2A, 150V Integrated DMOS Power Switch
  • Off-the-Shelf Power Transformers
  • No Opto-Coupler or Transformer Third Winding Required for Voltage Feedback
  • 116µA Quiescent Current
  • Boundary Mode Operation
  • Accurate Input Enable & Undervoltage Lockout with Hysteresis
  • Output Diode Temperature Compensation
  • H Grades: –40°C to 150°C Operating Junction Temp
Tags: Semiconductor & IC
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