SSC3S901 |Sanken Electric

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SSC3S901

Data sheetdownload (PDF:1035.31KB)
Application Note

Description

The SSC3S900 series are SMZ-driven controller ICs designed for LLC current-resonant switching power supplies, incorporating a floating drive circuit that drives a high-side power MOSFET.
And their functions include: Standby Mode Switching Function, Overload Protection with input voltage compensation, Automatic Dead Time Adjustment, and Capacitive Mode Detection.
These functionally-rich products enable power supply systems to be high efficient and low noise with only a few external components, resulting in downsizing and high cost-effectiveness.

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Application

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

Features

・Standby Mode Change function: changes to standby mode
   by external signal
 -Output Power at Light Load: 100 mW (Pin = 0.27 W)
 -Burst mode in standby operation
 -Reduces audible noise by Soft-On/Soft-Off function
・Supports universal AC input power supplies
・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
 - Limited Output Power Protection (LPP)
 - Overload Protection (OLP)
 - Overvoltage Protection (OVP)
 - Thermal Shutdown (TSD)

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
SeriesSSC3S900
ST Terminal Breakdown Voltage600V
VCC Breakdown Voltage35V
Oscillating Frequency32k to 300kHz

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Representative Circuit

Internal Block Diagram

Pin-out Diagrams

Data sheetdownload (PDF:1035.31KB)
Application Note
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