Firmenblog über Recycle Renesas AC/DC Converters:Power Factor Correction Controller,Synchronous Rectifier Controller

Recycle Renesas AC/DC Converters:Power Factor Correction Controller,Synchronous Rectifier Controller

Shenzhen Mingjiada Electronics Co., Ltd. is a well-established, globally leading company specialising in the recycling of electronic component inventory. We offer high-value recycling services for a wide range of electronic components, including integrated circuits, 5G chips, new energy ICs, IoT chips, Bluetooth chips, automotive chips, AI ICs, Ethernet ICs, memory chips, sensors and IGBT modules. We are committed to helping our clients manage their inventory, reduce warehousing costs and minimise overall operational expenditure by providing high-quality recycling services.

Recycling Process:

If you have surplus electronic components that need to be disposed of, please send an inventory list of the ICs or modules you wish to sell to our email address. We will dispatch specialist staff to your premises to carry out an initial inspection and sorting of the components, and provide a quotation based on factors such as the type, quantity and quality of the components to be recycled. Once an agreement has been reached, the specific terms of delivery and transaction can be negotiated.

I. Renesas Power Factor Correction (PFC) Controller Series

Active power factor correction controllers are positioned at the AC input front end. By shaping the input current waveform, they improve the power factor and suppress grid harmonics, thereby complying with IEC 61000-3-2 and various global energy efficiency regulations. The series is divided into four main product lines: Critical Conduction Mode (CRM), Continuous Conduction Mode (CCM), Interleaved PFC, and Single-Stage Integrated PFC.

Main Product Lines and Key Features

CRM (Critical Conduction Mode) PFC Controllers (Small to Medium Power: 75W–300W)

Representative Models: R2A20133DSP, R2A20112 (Interleaved CRM PFC)

Operates in Zero Current Switching (ZCS) mode, offering low switching losses and excellent EMI performance;

Built-in loop compensation, soft start, output overvoltage protection (OVP) and current limit protection;

The interleaved architecture effectively reduces ripple in the input filter capacitors and minimises the size of magnetic components;

Suitable for: LED driver power supplies, desktop adaptors and industrial control auxiliary power supplies.

CCM (Continuous Conduction Mode) PFC Controller (Medium to High Power: 300W–3kW)

Representative models: ISL6730 series, SA90CA

Average current-mode control ensures stable operation across the entire load range;

Supports programmable switching frequency and frequency jitter to optimise electromagnetic interference;

Features power-off retention control, power limiting and feedback open-circuit detection;

Compatible with Boost and totem-pole PFC topologies; widely used in server power supplies, medical power supplies and high-power energy storage systems.

Integrated Single-Stage PFC AC/DC Controller (High-Density Fast Charging Solution)

Representative Models: iW3627-00 (Dialog product line, part of Renesas)

Single-stage architecture integrates PFC with isolated AC-DC conversion, eliminating the need for a separate PFC inductor and high-voltage bus capacitor;

No secondary-side compensation circuit required, simplifying the peripheral BOM;

Supports a wide AC input range, achieves high power factor natively, and is compatible with SiC switching devices;

Typical applications: 65W–140W USB PD fast-charging power supplies, enabling extreme miniaturisation.

PFC + Resonant Converter Combination Controller (High-Power GaN Platform)

Representative model: RRW11011 (new HWLLC platform)

Integrated interleaved phase-shift PFC + half-wave LLC control;

Renesas’ proprietary ZSP zero standby power technology;

Suppresses bus ripple and ensures two-phase current balancing, supporting a wide output range of 5V to 48V;

Designed for 100W to 500W industrial chargers, electric bicycle power supplies and high-power portable energy storage systems.

Core Benefits of the PFC Controller

Power factor improved to >0.95, reducing reactive power losses in the grid;

Suppression of total harmonic distortion (THD), meeting global safety and energy efficiency regulations;

Compatible with high-frequency GaN/SiC devices, enabling smaller power supply designs;

Comprehensive protection system: OVP/OCP/OTP, soft start and surge suppression, enhancing overall system reliability.

II. Renesas Synchronous Rectification (SR) Controller Series

Traditional power supplies utilise Schottky diodes for rectification on the secondary side, resulting in high conduction losses and significant temperature rise. Synchronous rectification controllers drive low Rdson MOSFETs to replace diodes, significantly improving efficiency at medium to high loads, making them essential components for high-power adapters and LLC resonant power supplies. Renesas’ SR controllers offer core advantages such as adaptive digital detection, lossless voltage sampling and compatibility with multiple topologies.

Representative Models and Key Performance Features

iW610-01C General-Purpose Synchronous Rectification Controller

Compatible topologies: QR-Flyback, ZVS, ACF, LLC;

Supports both DCM and CCM operating modes; capable of both high-side and low-side SR drive;

Output voltage range of 3 V to 28 V, perfectly suited for USB PD fast charging and industrial 24 V power supplies;

Compact SOT23 package, suitable for high-density adapter layouts.

iW676 Series Digital Adaptive Synchronous Rectification Controller

Lossless detection of SR MOSFET drain-source voltage for precise determination of turn-on and turn-off timing;

Adaptive turn-off dead-time control, eliminating the need for additional parallel Schottky diodes;

AVP (Active Voltage Positioning) for faster dynamic load response;

Optimised no-load power consumption to meet stringent standby power consumption standards.

RRW43110 (SR controller for the HWLLC platform)

Optimised specifically for GaN half-wave LLC high-power solutions;

Forms a complete solution when paired with the RRW11011 PFC+LLC main controller;

Suitable for 200–500W industrial fast chargers and outdoor energy storage power supplies.

Key Advantages of Synchronous Rectification Controllers

Compared to diode rectification, system efficiency is improved by 1%–4%, significantly reducing the temperature rise of the enclosure;

Adaptive timing control prevents the risk of common-path short-circuiting in MOSFETs;

Wide output voltage compatibility, covering everything from low-voltage fast charging to 48V industrial power supplies;

Intelligent power reduction at light loads, balancing full-load efficiency with no-load energy efficiency.