InnoSwitch3-Pro

Digitally Controllable Off-Line CV/CC QR Flyback Switcher IC with Integrated High-Voltage Switch, 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 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, high-voltage switch, 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 FET series load switch
  • Integrated 3.6 V supply for external MCU
  • 4.75 Ω ultra-fast SR pull-down resistance (Avaliable with H302 parts)

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
  • Open SR FET gate detection
  • Hysteretic thermal shutdown
  • Programmable watchdog timer functionality for system faults
  • Telemetry for power supply status and fault monitoring
  • IS pin short/output short-circuit fault detection (H302 parts)

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

Applications

Power Table

Output Power Table1

Product4,5

230 VAC ± 15%

85-265 VAC

Adapter2

Open Frame3

Adapter2

Open Frame3

INN3365C/3375C-H30X

25 W

30 W

22 W

25 W

INN3366C/3376C-H30X

35 W

40 W

27 W

36 W

INN3377C-H30X

40 W

45 W

36 W

40 W

INN3367C-H30X

45 W

50 W

40 W

45 W

INN3368C-H30X

55 W

65 W

50 W

55 W

INN3379C-H3026

80 W

85 W

65 W

75 W

INN3370C-H3026

90 W

100 W

75 W

85 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. 650 V Switch (INN336x); 725 V Switch (INN3375-7); 750 V Switch (INN3379, INN3370)
  6. Incorporates GaN technology

InnoSwitch3-Pro Feature Codes

InnoSwitch3-Pro ICs are highly configurable, and require a "Feature Code" to specify all of the configurable characteristics, such as the IS Pin Short/Output Short-Circuit Fault Detection, SR Pull-Down Resistance, and others. Feature Codes consist of the letter "H" followed by three numbers and are added to the end of the base part number. A Feature Code is required when ordering parts (e.g., INN3365C-H302).

The tables below provide a list of the characteristics of the Feature Codes, and the  parts available with that Feature Code. Please use these to determine which InnoSwitch3-Pro part is the best fit for your application.

Feature
Code
IS Pin Short/Output Short-Circuit Fault DetectionSR Pull-Down Resistance
H302¹Enabed4.75 Ω (Fast)
H301²Disabled12.7 Ω (Slow)

Notes:

  1. Recommended for all new designs
  2. Not available for INN3379 and INN3370

Product Documents

Articles and Whitepapers

Design Examples

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