InnoSwitch3-Pro

Digitally Controllable Off-Line CV/CC QR Flyback Switcher IC with Integrated High-Voltage MOSFET, Synchronous Rectification and FluxLink Feedback

Figure 1. Typical Application

Data Sheets

Product Details

The InnoSwitch™3-Pro series family of ICs dramatically simplifies the development and manufacturing of fully programmable, highly efficient power supplies, particularly those in compact enclosures. The universal I2C interface enables dynamic control of output voltage and current along with many configurable features. Telemetry provides reporting of programmed features and fault modes.

InnoSwitch3-Pro devices are ideal for AC/DC power supply applications up to 65 W where fine (10 mV, 50 mA) output voltage and current adjustment are necessary. Typical implementations comprise a system microprocessor or dedicated microcontroller with an I2C port that is used to configure, control and supervise operation of the power sub-system. The uVCC pin provides bias to the microprocessor in standalone implementations such as USB PD adapters and chargers.

Product Highlights

Digitally Controlled via I2C Interface

  • Dynamic adjustment of power supply voltage and current
  • Telemetry status read-back with processor interrupt
  • Comprehensive set of configurable features

Highly Integrated, Compact Footprint

  • Multi-mode Quasi-Resonant (QR) / CCM flyback controller, 650 V or 725 V MOSFET, secondary-side sensing and synchronous rectifier driver
  • Optimized efficiency across line and load range
  • Integrated FluxLink™, HIPOT-isolated, feedback link
  • Instantaneous transient response
  • Drives low-cost N-channel MOSFET series load switch
  • Integrated 3.6 V supply for external MCU

EcoSmart™ – Energy Efficient

  • Less than 30 mW no-load including line sense and MCU
  • Easily meets all global energy efficiency regulations
  • Low heat dissipation

Advanced Protection / Safety Features

  • Input voltage monitor with accurate brown-in/brown-out and overvoltage protection
  • Output OV/UV fault detection with independently configured responses
  • Secondary FET / diode short protection
  • Open SR FET gate detection
  • Hysteretic thermal shutdown
  • Programmable watchdog timer functionality for system faults
  • Telemetry for power supply status and fault monitoring

Full Safety and Regulatory Compliance

  • Reinforced insulation
  • Isolation voltage >4000 VAC
  • 100% production HIPOT compliance testing
  • UL1577 and TUV (EN60950) safety approved

Green Package

  • Halogen free and RoHS compliant

Applications

  • High efficiency USB PD 3.0 + PPS/QCA adapters
  • Multiprotocol adapters including QuickCharge, AFC, FCP, SCP
  • Direct-charge mobile device chargers
  • Multi-chemistry tool and general purpose battery chargers
  • Adjustable CV and CC LED ballast designs up to 65 W

Applications

Power Table

Output Power Table1

Product4,5

230 VAC ± 15%

85-265 VAC

Adapter2

Open Frame3

Adapter2

Open Frame3

INN3365C/3375C

26 W

30 W

20 W

25 W

INN3366C/3376C

35 W

40 W

25 W

35 W

INN3377C

40 W

45 W

35 W

40 W

INN3367C

45 W

50 W

40 W

45 W

INN3368C

55 W

65 W

45 W

50 W

Notes: 

  1. Max output power is dependent on the design, with maximum IC package temperature kept <125 °C.
  2. Minimum continuous power in a typical non-ventilated enclosed typical size adapter measured at 40 °C ambient.
  3. Minimum peak power capability.
  4. C Package: InSOP-24D
  5. INNxx6xC - 650 V MOSFET, INNxx7xC - 725 V MOSFET

Product Documents

Articles and Whitepapers

Design Examples

Product Image