Off-Line CV/CC QR Flyback Switcher IC with Integrated Primary-Side Switch, Synchronous Rectification, FluxLink Feedback and Constant Power Profile
The InnoSwitch™3-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.
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
- 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
- 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 and TUV (EN60950, EN62368) safety approved
- Excellent noise immunity enables designs that achieve class “A” performance for EN61000-4; 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) and Ford FMC1278 (RI-115)
|Output Power (Watts)|
|230 VAC ± 15%||85-265 VAC|
|INN3264C/3274C-H2XX||20 W||25 W||15 W||20 W|
|INN3265C/3275C-H2XX||25 W||30 W||22 W||25 W|
|INN3266C/3276C-H2XX||35 W||40 W||27 W||36 W|
|INN3277C-H2XX||40 W||45 W||36 W||40 W|
|INN3267C-H2XX||45 W||50 W||40 W||45 W|
|INN3268C-H2XX||55 W||65 W||50 W||55 W|
|INN3278C-HXXX5||70 W||75 W||55 W||65 W|
|INN3279C-HXXX5||80 W||85 W||65 W||75 W|
|INN3270C-HXXX5||90 W||100 W||75 W||85 W|
- Minimum continuous power in a typical non-ventilated enclosed typical size adapter measured at 40 °C ambient. Max output power is dependent on the design. With condition that package temperature must be < = 125 °C.
- Minimum peak power capability.
- Package: inSOP-24D.
- 650 V Switch (INN326x); 725 V Switch (INN3274-7); 750 V Switch (INN3278, INN3279, INN3270).
- Incorporates PowiGaN™ technology.
InnoSwitch-3 Feature Codes
InnoSwitch-3 ICs are highly configurable, and require a "Feature Code" to specify all of the configurable characteristics, such as the Auto Restart Threshold, Fault Response, 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., INN3265C-H202).
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 InnoSwitch-3 part is the best fit for your application. Alternatively, you can use our Build Your Own InnoSwitch tool.
|CDC||AR Threshold||OTP Response||AR |
|Output Profile||Vout OVP||Secondary|
|H114||0 mV||63%||AR||AR||Fixed CC||Enabled||AR|
|H201||0 mV||3.45 V||Hysteretic||AR||CP-6V||AR|
|H202||300 mV||3.45 V||Hysteretic||AR||CP-6V||AR|
|H203||0 mV||3.45 V||Hysteretic||AR||CP-9V||AR|
|H204||300 mV||3.45 V||Hysteretic||AR||CP-9V||AR|
|H205||0 mV||3.45 V||Hysteretic||AR||CP-12V||AR|
|H206||0 mV||63%||Latch Off||Latch Off||Fixed CC||Latch Off|
|H207||0 mV||3.45 V||Latch Off||Latch Off||CP-15V||Latch Off|
|H208||0 mV||3.45 V||Latch Off||AR||CP-15V||Latch Off|
|H209||0 mV||3.45 V||Latch Off||AR||Fixed CC||Latch Off|
|H212||0 mV||55%||AR||AR||Fixed CC||Latch Off|
|H215||0 mV||3.45 V||Latch Off||AR||Fixed CC||Latch Off|
|H217||0 mV||63%||Latch Off||Latch Off||Fixed CC||Latch Off|
|H218*||0 mV||3.45 V||Latch Off||AR||Fixed CC||Latch Off|
*INN3279C-H218 has specific ILIM = 2.30 A; ILIM+1 = 2.58 A.
In the following tables, click the PDF icon to view the data sheet addendum for each part.
= indicates part available with that Feature Code