Delivers up to 24 Watts, 100V Isolated Monolithic

Linear Technology Korea (CEO Hong Sa-gwak) announced the launch of a monolithic flyback regulator (product name: LT8304) that significantly simplifies the design of isolated DC/DC converters.

By directly sampling the isolated output voltage from the primary-side flyback waveform, this chip eliminates the need for optocouplers or auxiliary windings for regulation. The LT8304 operates over a 3V to 100V input voltage range and features an integrated 2A/150V DMOS power switch that delivers up to 24 watts of output power, making it well-suited for a wide range of telecom, datacom, automotive, industrial, medical, and military applications.

The LT8304 operates in boundary mode, a variable frequency current mode control switching principle that provides output voltage regulation within ±5% across the entire line, load, and temperature range. Boundary mode enables the use of smaller transformers compared to comparable continuous conduction mode (CCM) designs. The output voltage is easily set using two external resistors and the transformer turns ratio.

Ready-made transformers specified in the datasheet can be used directly for various applications. This product offers high integration and Burst Mode® operation with low ripple characteristics, providing an easy-to-use, high-efficiency solution for isolated power supplies with minimal component count.

Additional features include output short-circuit protection, 116µA no-load standby current, precise enable and hysteretic low voltage lockout, internal soft start and loop compensation, as well as output diode temperature compensation.

The LT8304 is available in a compact SO-8 package with enhanced thermal performance. Extended and industrial versions operate over a temperature range of –40°C to 125°C. Based on a quantity of 1,000 units, the price is set at $3.55 per unit.