The INN4174C-H192 from Power Integrations is an Offline CV/CC ZVS Flyback Switcher IC that is ideal for high-density flyback designs up to 220 W, high-efficiency CV/CC power supplies, and high-efficiency USB power delivery (PD) adapter applications. It requires an input voltage of 85-265 V and provides an output voltage of 3 - 24 V. This switch delivers an output power (peak) of up to 170 W. It includes control logic, LDO regulator, receiver controller, MOSFETs, a secondary controller, oscillator/timer, feedback driver, logic gates, error compensator, secondary latch, detector, and protection circuitries in a single IC. This switch IC has been designed to dramatically improve the efficiency of flyback power converters, particularly those requiring a compact form-factor. It combines the functionalities of the switch with ClampZero active clamp ICs to significantly reduce system and primary switch losses, allowing for extremely high power densities.

This power switcher supports a unique control algorithm to enable zero voltage switching (ZVS) in both discontinuous conduction mode (DCM) and continuous conduction mode (CCM). It integrates synchronous rectification driver and secondary-side sensing along with an external sense resistor to accurately control the output current. This EcoSmart switch consumes less than 30 mW of power under no-load condition (with line sense), thereby delivering an efficiency of up to 95%. It also offers a reinforced isolation voltage of over 4000 V (AC) and has undergone 100% production HIPOT tests to ensure full safety and regulatory compliance. This RoHS-compliant IC is equipped with over-voltage protection (OVP), over-current limit function, and over-temperature shutdown to prevent circuit failure. It is available in a surface-mount package that measures 10.8 x 9.4 mm.