INN3278C-H114
Off-Line CV/CC QR Flyback Switcher IC with Integrated Primary-Side Switch, Synchronous Rectification, FluxLink Feedback and Constant Power Profile
Product Details
The InnoSwitch3-CP family of ICs dramatically simplifies the design and manufacture of flyback power converters, particularly those requiring high efficiency and/or compact size. The InnoSwitch3-CP family incorporates a high-voltage primary-side switch, primary and secondary controllers, and safety-rated feedback into a single IC. These devices incorporate multiple protection features including line over and under-voltage protection, output over-voltage and over-current limiting, and over-temperature shutdown. Devices are available that support the common combinations of latching and auto-restart behaviors required by applications such as quick charge and USB PD designs. The devices are available with and without cable-drop compensation.
Product Highlights
Highly Integrated, Compact Footprint
- Quasi-Resonant (QR) / CCM flyback controller, high-voltage primary-side switch, secondary-side sensing and synchronous rectification driver
- Integrated FluxLink, HIPOT-isolated, feedback link
- Easily interfaces to load-directed and fast-charge protocol ICs
- Constant Power (CP) Profile minimizes charging time with continuous adjustment of output current and voltage
- Accurate CV/CC/CP, independent of external components
- External IS resistor allows custom CC programming
- Instantaneous transient response with 0%-100%-0% load step
PowiGaN Technology
- PI’s proprietary gallium nitride technology
- Up to 100 W output without heatsinks
- INN3278, INN3279 and INN3270
EcoSmart – Energy Efficient
- Up to 95% efficiency across full load range
- Less than 30 mW no-load including line sense
- Easily meets all global energy efficiency regulations
- Low heat dissipation
Advanced Protection / Safety Features
- Secondary Switch or diode short-circuit protection
- Open SR FET-gate detection
- Fast input line UV/OV protection
Optional Features
- Cable-drop compensation with multiple settings
- Variable output voltage, constant current profiles
- Auto-restart or latching fault response for output OVP/UVP
- Multiple output UV fault thresholds
- Latching or hysteretic primary over-temperature protection
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 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)
Specifications
| Output Power (Max) - Open Frame, 230V | 75.00 W |
| Output Power (Max) - Enclosed, 230V | 70.00 W |
| Output Power (Max) - Enclosed, Univ | 55.00 W |
| Output Power (Max) - Open Frame, Univ | 65.00 W |
| Switching Frequency (min) | 25.00 kHz |
| Switching Frequency (max) | 95 kHz |
| Breakdown Voltage | 750 V |
| Voltage - Output (Min) | 5.00 V |
| Voltage - Output (Max) | 24.00 V |
| Voltage - Input (Min) | 85 V |
| Voltage - Input (Max) | 265 V |
| Auto-Restart & Overvoltage Response | Auto-restart |
| Auto-Restart Threshold | 63% |
| Cable Drop Compensation | 0 mV |
| IC Package | InSOP-24D |
| Internal Switch | Yes |
| Over-Temperature Response | Auto-restart |
| PowiGaN? | Yes |
| Temperature - Operating (Min) | -40 °C |
| Temperature - Operating (Max) | 150 °C |
| Control Scheme | Fluxlink |
| Protection Features |
Input Overvoltage
Input Undervoltage
Open SR FET Detection
Output Overload
Output Overvoltage
Output Short Circuit
Overtemperature
|
| Output Profile | CC |
| Topology | Flyback |
| Product Sub-Type | PMIC |
| MSL Rating | 3 |
| Secondary Response | Auto-restart |
