Silanna Semiconductor SZ1131 | Demoboard SZ-RD15-00

Description

The SZ1131 is an Active Clamp Flyback (ACF) PWM Controller that integrates an adaptive digital PWM controller and the following Ultra High-Voltage (UHV) components: active clamp FET, active clamp driver and a start-up regulator.The device provides the ease-of-design of a simple flyback controller with all the benefits of an ACF design, including recycling of the leakage inductance energy of the flyback transformer and limiting the primary FET drain voltage spike during the turn-off events. Employing Silanna’s OptiModeTM digital control architecture, the SZ1131adjusts its mode of operation on a cycle-by-cycle basis to maintain high efficiency, low EMI, fast dynamic load regulation and other key power supply parameters in response to varying line voltage and load.

Features

• Integrated UHV Active Clamp FET, Active Clamp Driver, and Start-up Regulator
• Capable of Over 94% Efficiency
• Flat Efficiency Across Universal (90 - 265 Vac) Input Voltage and Load
• < 20 mW System No Load Power Consumption
• Up to 146 kHz Switching Frequency Operation
• OptiMode™ Cycle-by-Cycle Adaptive Digital Control
• Self-tuning Valley Mode Switching (VMS)
• Advanced QR VMS for > 6 dB EMI Margin
• Tight Switching Frequency Regulation for Improved Input EMI Filter Utilization
• Multi-Mode Operation (Burst Mode, QR, VMS)
• OTP, OVP, OCP, OPP, OSCP, TSP Protections
• Up to 65 W Output Power for Universal AC Input
• 100W+ Output Power with Front-End PFC
• 16-pin SOIC Package

Typical applications

• USB PD Chargers
• High-Power-Density USB-PD AC/DC Power Supplies
• Battery Chargers for Mobile Devices

More information

• IC product information