Highly Integrated, Compact Footprint

• Very high efficiency across full load range

• Incorporates a multi-mode Quasi-Resonant (QR) / CCM flyback

controller, high-voltage switch, secondary-side sensing and synchronous

rectification driver

• Excellent multi-output cross regulation with weighted secondary-side

regulation (SSR) feedback and synch FETs

• Integrated FluxLink™, HIPOT-isolated, feedback link

• Exceptional CV/CC accuracy, independent of external components

• Adjustable accurate output current sense using external output sense

resistor

• PowiGaN™ technology – up to 100 W without heat sinks (INN3678C,

INN3679C and INN3670C)

EcoSmart™ – Energy Efficient

• Less than 30 mW no-load including line sense

• Easily meets all global energy efficiency regulations

• Low heat dissipation

Advanced Protection / Safety Features

• Open SR FET-gate detection

• Fast input line UV/OV protection

• Auto-restart fault response for output OVP

• 725 V and 750 V switch rating series for excellent surge withstand

• 900 V and 1700 V switch rating series for industrial design or extra

safety margin

Optional Features

• Auto-restart output UV protection with option for peak power delivery

Full Safety and Regulatory Compliance

• Reinforced isolation

• Isolation voltage >4000 VAC

• 100 production HIPOT testing

• UL1577 isolation voltage 4000 VAC (max), TUV (EN62368-1),

CQC (GB4943.1) and DIN VDE V 0884-11(4) safety approved

• Excellent noise immunity enables designs that achieve class “A”

performance criteria for EN61000-4 suite; EN61000-4-2, 4-3

(30 V/m), 4-4, 4-5, 4-6, 4-8 (100 A/m) and 4-9 (1000 A/m)

Green Package

• Halogen free and RoHS compliant

Applications

• Auxiliary, standby and bias power supplies for appliances, computers

and consumer products

• Utility meter, smart grid and industrial power supplies

Description

The InnoSwitch™3-EP family of ICs dramatically simplifies the design

and manufacture of flyback power converters, particularly those

requiring high efficiency and/or compact size. The InnoSwitch3-EP

family combines primary and secondary controllers and safety-rated

feedback into a single IC.

InnoSwitch3-EP family devices incorporate multiple protection features

including line over and undervoltage protection, output overvoltage

and over-current limiting, and over-temperature shutdown. Devices are

available with standard and peak power delivery options, and

commonly used auto-restart protection behaviors.