RVSW013-FJ-R | RECOM

Dedicated Chip, RVSW013-FJ-R, RECOM

The RVSW013 is a dedicated controller for bidirectional converters, integrating a power MOSFET with an ultra-low on-resistance of 30 mΩ. It supports two operating modes: PWM mode and synchronous rectification mode, in which the internal power MOSFET functions as a synchronous rectifier. An enable pin allows switching between these two modes, enabling seamless bidirectional energy conversion. In PWM mode, RVSW013 offers optional voltage limiting protection, specifically designed for bidirectional converter applications. It operates in critical conduction mode (CRM) under heavy load conditions and features constant current compensation, which enhances output current regulation. Additionally, the device supports optocoupler-based secondary-side feedback (SSR control), allowing it to enter continuous conduction mode (CCM) during high load conditions, helping to reduce transformer size. Under light-load conditions, the switching frequency decreases with the load, improving efficiency at light load and reducing no-load power consumption. In synchronous-rectification mode, the same internal power MOSFET used in PWM mode operates as the synchronous rectifier.

The device supports both CCM and DCM, and is capable of self-powered operation by drawing energy from the drain of the power transistor. This eliminates the need for an auxiliary winding, simplifying both transformer design and the surrounding circuitry.The RVSW013 also includes an intelligent mode detection feature, allowing it to reliably distinguish between PWM mode and synchronous rectification mode. In standby mode, when both function are disabled via the EN pin, the device achieves zero power consumption. With its ultra-low operating voltage range, RVSW013 is ideal for use in bidirectional single-cell battery charging and discharging applications.

Features

• Can be Used for PWM Control and Synchronous Rectification
• Synchronous Rectification Supports Both CCM and DCM Modes
• SSR Feedback can Enter CCM Mode Under Heavy Load
• SSR Feedback can Enter Intermittent Mode Under Extremely Light Load
• SSR Feedback Features a Direct Optocoupler Interface
• Intelligent Identification for Mode Switching Realizes Bidirectional Control
• Programmable Maximum Peak Current Limit
• Programmable Soft-start Time
• Built-in Over-temperature Protection Function

Applications

• Bidirectional Flyback Converters
• Industrial Power Conversion
• BMS Auxiliary Power Supplies
• Isolated Communication Power Supplies