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SSC3S931

The SSC3S931 is a controller 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 the automatic dead time adjustment and the capacitive mode detection.
The product achieves high efficiency, low noise, and high cost-effective power supply systems with few external components.

Features

    ・Capacitive Mode Detection Function
    ・Reset Detection Function
    ・Automatic Dead Time Adjustment Function
    ・Protections
    - High-side Driver UVLO: Auto-restart
    - VCC Pin Output Overvoltage Protection (VCC_OVP):
      Latched Shutdown
    - Input Overvoltage Protection (HVP): Latched Shutdown
    - Input Undervoltage Protection (UVP): Auto-restart
    - Overcurrent Protection (OCP): Auto-restart, peak drain
     current detection, 2-step detection
    - Overload Protection (OLP): Latched Shutdown
    - Optocoupler Open Protection (OOP): Latched Shutdown
    - Thermal Shutdown (TSD) : Latched Shutdown

Application

    Switching power supplies for electronic devices such as:
    ・Audio Visual (AV) Equipment
    ・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 Latch
OVP Latch
Brown-in / out YES
TSD Latch
Power Consumption at No Load

Typical Application

Typical Application

Block Diagram

Block Diagram

Pin Configuration Definitions

Pin Configuration Definitions

Questions or Comments?

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