Analog Devices LT8303 | Demoboard ICM-01

Description

The LT®8303 is a micropower high voltage isolated flyback converter. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no third winding or opto-isolator for regulation. The output voltage is programmed with a single external resistor. Internal compensation and soft start further reduce external component count. Boundary mode operation provides a small magnetic solution with excellent load regulation. Low ripple Burst Mode operation maintains high efficiency at light load while minimizing the output voltage ripple. A 450mA, 150V DMOS power switch is integrated along with all high voltage circuitry and control logic into a 5-lead ThinSOT™ package.

Features

• 5.5V to 100V Input Voltage Range
• 450mA, 150V Internal DMOS Power Switch
• Up to 5W of Output Power
• Low Quiescent Current:
• 70μA in Sleep Mode
• 280μA in Active Mode
• Boundary Mode Operation at Heavy Load
• Low-Ripple Burst Mode® Operation at Light Load
• Minimum Load <0.5% (Typ) of Full Output
• VOUT Set with a Single External Resistor
• No Transformer Third Winding or Opto-Isolator Required for Regulation
• Accurate EN/UVLO Threshold and Hysteresis
• Internal Compensation and Soft-Start
• 5-Lead TSOT-23 Package
• AEC-Q100 Qualified for Automotive Applications

Typical applications

• Isolated Telecom, Datacom, Automotive, Industrial, and Medical Power Supplies, Isolated Auxiliary/Housekeeping Power Supplies

More information

• Datasheet
• IC product information