STK730-080 (CHN)

Overview

The STK730-080 provides on-chip the power switching,

error detection, amplifier, and overcurrent protection

circuits required in a self-excitation type semi-regulated

switching regulator. As a result, it can be used to construct

a switching power supply with a minimal number of

external components. Furthermore, due to the adoption of

MOSFETs as the power switching elements, an oscillator

frequency higher than that possible with bipolar

transistors can be used. This allows miniaturized power

supply systems to be constructed by reducing the size of

the pulse transformer and capacitors.

Applications

• Power supplies in CRT and CTV products

• Power supplies in office automation products

• Switching power supplies in general

Features

• Power MOSFETs adopted

• Built-in error detection circuit

• Built-in overcurrent protection circuit

• Product series differentiated by output capacity

(110 to 280 W)

• Few external components required

• Since the STK730-080 supports higher oscillator

frequencies, smaller pulse transformers can be used.

• Takes all major national stability standards and EMF

hazard standards into consideration.

• The IMST (insulated metal substrate technology)

substrate functions as an EMF shield plate and supports

low noise design.