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SSC3S921

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Package:SOP18

The SSC3S921 is a controller with SMZ method for LLC current resonant switching power supplies, incorporating a floating drive circuit for a high-side power MOSFET.
The product includes useful functions such as Standby Function, Automatic Dead Time Adjustment, and Capacitive Mode Detection.
The product achieves high efficiency, low noise and high cost-performance power supply systems with few external components.

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Features

    ・Standby Mode Change Function
     -Output Power at Light Load 125 mW (Pin = 0.27 W)
     -Burst mode in standby operation
     -Reduces audible noise by Soft-On/Soft-Off function
    ・PFC IC ON/OFF Function: In standby operation, the IC
       turns off PFC IC.
    ・Floating Drive Circuit
    ・Soft-Start function
    ・Capacitive Mode Detection Function
    ・Reset Detection Function
    ・Automatic Dead Time Adjustment Function
    ・Brown-In and Brown-Out Function
    ・Built-in Startup Circuit
    ・Input Capacitor Discharge Function
    ・Protection Functions
     - High-side Driver UVLO
     - Overcurrent Protection (OCP): 2-step detection
     - Overload Protection (OLP)
     - Overvoltage Protection (OVP)
     - Thermal Shutdown (TSD)

Application

    Switching power supplies for electronic devices such as:
    ・Digital appliances
    ・Office automation (OA) equipment
    ・Industrial apparatus
    ・Communication facilities

Specifications

Control Method Current Resonant
Type Controller
Output Current W
RDS(ON) (max.) Ω
VDSS (min.) V
VCC (max.) 35 V
Oscillating Frequency(typ.) 31.5 to 300 kHz
OCP YES
OLP Auto Restart
OVP Auto Restart
Brown-in / out YES
TSD Auto Restart
Power Consumption at No Load
Package Weight (Typ.) 0.27 g

Typical Application

Typical Application

Block Diagram

Block Diagram

Pin Configuration Definitions

Pin Configuration Definitions

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