LT®8316 600 Vin Micropower No-Opto Isolated F

By Linear Technology 64

LT®8316 600 Vin Micropower No-Opto Isolated F

Linear Technology's LT8316 is a micropower, high-voltage flyback controller that requires no opto-isolator for regulation. The device samples the output voltage from the isolated flyback waveform appearing across a third winding on the transformer. Quasi-resonant boundary mode operation improves load regulation, reduces transformer size, and maintains high efficiency.

At start-up, the LT8316 charges its INTVCC capacitor via a high-voltage current source. During normal operation, the current source turns off and the device draws its power from a third winding on the transformer, minimizing standby power dissipation.

The LT8316 operates from a wide range of input supply voltages and can deliver up to 100 W of power. It is available in a thermally enhanced 20-pin TSSOP package with four pins removed for high-voltage spacing.

Features
  • Wide input voltage range: 16 V to 600 V
  • No opto-isolator required for regulation
  • Quasi-resonant boundary mode operation
  • Constant-current and constant-voltage regulation
  • Low-ripple light load Burst Mode® operation
  • Low quiescent current: 75 µA
  • Programmable current limit and soft-start
  • TSSOP package with high-voltage pin spacing
Applications
  • Isolated telecom, automotive, industrial, and medical power supplies
  • Isolated off-line housekeeping power supplies
  • Electric vehicles and battery stacks
  • Multi-output isolated power supplies for inverter gate drives

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