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.