SSC3S927 |Sanken Electric

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SSC3S927

Data sheetdownload (PDF:1089.11KB)
Application Note

Description

The SSC3S927 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-effective power supply systems with few external components.

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Application

Switching power supplies for electronic devices such as:
・ Digital Appliances: LCD television and so forth
・ Office Automation (OA) equipment: server, multifunction
    printer, and so forth
・ Industrial Apparatus
・ Communication Facilities

Features

・ Standby Mode Change Function
 -Output Power at Light Load 150 mW(PIN = 0.27 W)
 -Burst operation in standby mode
 -Soft-on/Soft-off function: reduces audible noise
・ PFC IC ON/OFF Function: In standby operation, the IC
    turns off PFC IC.
・ Soft-start Function
・ Capacitive Mode Detection Function
・ Reset Detection Function
・ Automatic Dead Time Adjustment Function
・ Brown-in and Brown-out Function
・ X-capacitor Discharge Function
・ Protections
 -High-side Driver UVLO: Auto-restart
 -Overcurrent Protection (OCP): Auto-restart, peak drain
    current detection, 2-step detection
 -Overload Protection (OLP): Auto-restart
 -Overvoltage Protection (OVP): Auto-restart
 -REG Overvoltage Protection (REG_OVP) : Auto-restart
 -Thermal Shutdown (TSD) : Auto-restart

Remarks

LLC IC

TypePart NumberFeature
xternal power supply type SSC9522SSuitable for low standby power applications.
Built-in standby function type
(Reducible in power supply size)
SSC3S901
SSC3S902
External-signal-controlled standby mode
2 types of protection mode: Auto-restart for 901, Latch for 902.
SSC3S910
SSC3S921
SSC3S927
Built-in Auto Standby Function
(PFC ON/OFF Function for 921, PFC ON/OFF Function and X-capacitor Discharge Function for 927.)

Package

Package Name:SOP18

Package Diagram

Specifications

Control MethodCurrent Resonant
SeriesSSC3S927
ST Terminal Breakdown Voltage600V
VCC Breakdown Voltage35V
Oscillating Frequency31.5k to 300kHz

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Representative Circuit

Internal Block Diagram

Pin-out Diagrams

Data sheetdownload (PDF:1089.11KB)
Application Note
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