Highly Integrated, Compact Footprint

• Zero voltage switching (ZVS) flyback controller with driver for

ClampZeroTM (active clamp IC)

• Unique control algorithm enables ZVS in both DCM and CCM

• Robust 750 V PowiGaNTM primary switch

• Steady-state switching frequency up to 155 kHz minimizes

transformer size

• Synchronous rectification driver and secondary-side sensing

• Integrated FluxLinkTM, HIPOT-isolated, feedback link

• Exceptional CV/CC accuracy, independent of external components

• Accurate, adjustable output current sense using external sense resistor

EcoSmart™ – Energy Efficient

• Up to 95 efficient

• Less than 30 mW no-load consumption including line sense

Advanced Protection / Safety Features

• Open SR FET-gate detection

• Fast input line UV/OV protection

• Output overvoltage and undervoltage protection

• Output over-current protection

• Over-temperature protection (OTP)

Optional Features

• Variable output voltage and constant current profiles

• Auto-restart or latching fault response for output OVP/UVP

• Multiple output UV fault thresholds

• Latching or hysteretic over-temperature protection

Full Safety and Regulatory Compliance

• Reinforced isolation >4000 VAC

• 100 production HIPOT testing

• UL1577, TUV (EN62368-1), CQC (GB4943.1) 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)

Green Package

• Halogen free and RoHS compliant

Applications

• High density flyback designs up to 220 W

• High efficiency CV/CC power supplies

• High efficiency USB PD adapters

Description

The InnoSwitch™4-CZ family of ICs partners with the ClampZero family

of active clamp ICs to dramatically improve the efficiency of flyback

power converters, particularly those requiring a compact form-factor.

The InnoSwitch4-CZ family incorporates primary and secondary

controllers, PowiGaN power switch and safety-rated feedback

FluxLink) into a single IC.

The combination of InnoSwitch4-CZ with ClampZero greatly reduces

system and primary switch losses, allowing for extremely high power

densities. InnoSwitch4-CZ also incorporates multiple protection

features including output overvoltage and over-current limiting, and

over-temperature shutdown. Devices are available that support

combinations of latching and auto-restart protection modes typically

required for applications such as chargers, adapters, consumer

electronics and industrial systems.