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SSC1S312A

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.

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

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

Questions or Comments?

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