Power Integrations InnoSwitch5-Pro Flyback Switcher ICs

Power Integrations InnoSwitch5-Pro Flyback Switcher ICs achieve over 95% efficiency and feature zero voltage switching using advanced SR FET control. The high efficiency of these InnoSwitch5-Pro allows designers to eliminate heat sinks, spreaders, and potting material for thermal management, reducing size and manufacturing complexity. These switcher ICs feature robust 750V and 900V PowiGaN™ primary switch options, synchronous rectification driver, secondary-side sensing, and an integrated 3.6V supply for the external MCU. These ICs include a post-production tolerance offset, ensuring accurate output constant-current (CC) control of more than 2% to support the UFCS protocol. The InnoSwitch5-Pro Flyback Switcher IC is ideal for high-density USB PD 3.1 Extended Power Range (EPR), UFCS, and multi-protocol adapters.

Features

Zero voltage switching (ZVS) using advanced SR FET control
Native support for 28V USB PD EPR
Lossless input line voltage sensing on secondary side for adaptive DCM/CCM/ZVS control
Enables <2% CC accuracy for UFCS protocol
Robust 750V and 900V PowiGaN primary switch options
Steady-state switching frequency up to 140kHz minimizes transformer size
Synchronous rectification driver and secondary-side sensing
Integrated FluxLink™, hipot-isolated, feedback link
Drives cost-effective N-channel FET series load switch
Integrated 3.6V supply for external MCU
Precise CV/CC/CP control

Dynamic adjustment of power supply voltage and current
Selectable DCM-only operation to reduce SR FET voltage stress
Optimized command set to reduce I²C traffic
Telemetry for power supply status and fault monitoring
Series load switch short-circuit protection
Disable output fault response
Fast input line UV/OV protection
Programmable output OV/UV fault detection and response
Open SR FET gate detection
Hysteretic thermal shutdown
Programmable watchdog timer for system faults

Applications

High-density power adapters
Multiprotocol adapters, including USB PD + PPS, 28V USB PD EPR, QC, VOOC, VFC, SCP, UFCS

Direct-charge mobile device chargers
Multi-chemistry tools and general-purpose battery chargers
Adjustable CV and CC LED ballast

Specifications

Up to 95% efficiency
<30mW no-load, including line sense and MCU
>1400V_AC reinforced isolation
100% production hipot testing

UL 1577 isolation voltage 4000V_AC and TUV (EN62368) safety approved
Halogen free
RoHS compliant

Power Integrations InnoSwitch5-Pro Flyback Switcher ICs

Features

Applications

Specifications

Application Schematic

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