InnoSwitch3-PD is Power Integrations' first flyback switcher IC with USB PD controller built in. This fully integrated solution combines USB PD, PPS, PowiGaN and FluxLink technologies to maximize efficiency and slash component count in adapters and chargers.
InnoSwitch3-PD dramatically simplifies the development and manufacturing of USB-PD power supplies by integrating primary switch and controller, isolated feedback, secondary control and USB-PD controller into a single package.
The architecture incorporates a novel inductive coupling feedback scheme, Fluxlink, to provide a safe, reliable, and low-cost means to communicate accurate direct sensing of the output voltage and current. The primary controller on InnoSwitch3-PD is a quasi-resonant (QR) flyback controller that has the ability to operate in continuous conduction mode (CCM), using both variable frequency and variable current control schemes. The InnoSwitch3-PD secondary controller consists of a transmitter circuit that is magnetically coupled to the primary receiver, an I2C interface to control power supply parameters and telemetry functions, a 4.4 V regulator, SR FET driver, QR mode circuit, oscillator and timing functions, and a host of integrated protection features.
Features
- USB Type C and PD Controller
- USB Power Delivery 3.0 + PPS provider and QC4 support
- Compliant with USB Type-C Rev. 1.3
- Integrated VCONN FETs with soft start and over-current protection
- Supports electronically marked cables
- Configurable pull-up resistor Rp
- On chip temperature sensor
- Telemetry for power supply status and fault monitoring
- PowiGaN technology – up to 100 W without heat sinks
- Dedicated NTC pin for temperature sense
Applications
- High efficiency USB PD 3.0 + PPS adapters for smart phones, tablets, notebooks, digital cameras, and Bluetooth accessories
- Quick Charge protocol-based power adapters
- Direct-charge mobile device chargers
Key Components
- Advanced quasi-resonant (QR) flyback and SR controller
- Integrates primary switch and controller, FluxLink isolated feedback link, secondary control and USB PD controller into a single package
- USB Type-C and USB PD controller
- Integrated protection features
Benefits
- Highly Integrated, Compact Footprint
- Multi-mode Quasi-Resonant (QR) / DCM / 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
- EcoSmart – Energy Efficient
- No-load consumption as low as 14 mW
- Enables power supply designs that easily comply with all global energy efficiency regulations
- Low heat dissipation
- Advanced Protection / Safety Features
- Input voltage monitoring 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 for system faults
- Integrated high voltage FETs for VBUS short protection on CC1, CC2
- Full Safety and Regulatory Compliance
- Reinforced insulation
- Isolation voltage >4000 VAC
- 100% production HIPOT compliance testing
- UL1577 and TUV (EN60950 and EN62368) safety approved
Schematic
InnoSwitch3-PD Typical Application Schematic