STK730-080

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.