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SSC1S312A

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Package:SOIC8

SSC1S312A is the controller IC of a quasi-resonant mode for a switching power supplies. The IC incorporates a startup circuit and a standby function to reduce a power consumption and standby power. In normal operation, the quasi-resonant mode operation achieves high efficiency and low noise. In addition, in medium to low load conditions, the operation mode is automatically changes the quasi-resonant mode to the bottom-skip mode to improve efficiency. The IC is provided in the SOIC8 package. The power supply that is a low component counts and a high performance-to-cost can be achieved by the rich set of protection features.

Design Support

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Features

    ・Multi-Mode Control
    ・Automatic Standby Function
    ・Input Power at No Load:
     <30mW at 100VAC
     <50mW at 230VAC
    ・Bottom-Skip Function
    ・Step-on Burst Oscillation Function
    ・Bias Assist Function
    ・Soft-Start Function
    ・Adjustable Startup Voltage
    ・Maximum On-time Limitation Function
    ・VCC Operational Range Expanded
    ・Leading Edge Blanking (LEB) Function
    ・Protection Functions
     Overcurrent Protection (OCP): Pulse-by-pulse
     Overvoltage Protection (OVP): Latched Shutdown
     Overload Protection (OLP): Latched Shutdown
     Thermal Shutdown (TSD): Latched Shutdown

Application

    ・Digital Appliance
    ・Office Automation (OA) Equipment
    ・White Goods
    ・Industrial Apparatus
    ・Communication Facilities

Specifications

Control Method Quasi-Resonant
Type Controller
Output Current W
RDS(ON) (max.) Ω
VDSS (min.) V
VCC (max.) 35 V
Oscillating Frequency(typ.) ― kHz
OCP YES
OLP Latch
OVP Latch
Brown-in / out NO
TSD Latch
Power Consumption at No Load
Package Weight (Typ.) 0.077 g

Typical Application

Typical Application

Block Diagram

Block Diagram

Pin Configuration Definitions

Pin Configuration Definitions

Selection Guide

SSC1S310A Series
Part Number Protection Operation
(OVP, OLP, TSD)
SSC1S311A Auto-restart
SSC1S312A Latched Shutdown

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