RECOM Power RVSW013 Dedicated Bidirectional Controller Chip
RECOM Power RVSW013 Dedicated Bidirectional Controller Chip integrates a power MOSFET with an ultra-low on-resistance of 30mΩ. The RECOM Power RVSW013 supports two operating modes: pulse-width modulation (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, the RVSW013 offers optional voltage limiting protection, specifically designed for bidirectional converter applications. The device operates in critical conduction mode (CRM) under heavy load conditions and features constant-current compensation, enhancing output current regulation. Additionally, the device supports optocoupler-based secondary-side feedback (SSR) control, enabling it to enter continuous conduction mode (CCM) under high load conditions, helping reduce transformer size. Under light-load conditions, the switching frequency decreases with the load, improving efficiency and reducing no-load power consumption.
In synchronous rectification mode, the same internal power MOSFET used in PWM mode serves as the synchronous rectifier. The device supports both CCM and DCM and can operate self-powered by drawing energy from the drain of the power transistor. This feature eliminates the need for auxiliary winding, simplifying both transformer design and the surrounding circuitry.
The RECOM Power RVSW013 also includes an intelligent mode-detection feature that reliably distinguishes between PWM and synchronous rectification modes. In standby mode, when both functions are disabled via the EN pin, the device consumes zero power. With the ultra-low operating voltage range, RVSW013 is ideal for 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
- Constant current compensation function under voltage limiting protection achieves constant current discharge
- 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
- Light load analog frequency reduction improves efficiency and reduces no-load power consumption
- Intelligent identification for mode switching realizes bidirectional control
- Internal power MOSFET with resistance as low as 30mΩ
- Programmable maximum peak current limit
- Programmable soft-start time
- Built-in over-temperature protection function
- Shutdown current in enable mode as low as 0.1µA
- Internally integrated self-power supply circuit
- 5mm x 5mm QFN package with strong heat dissipation
Applications
- Bidirectional flyback converters
- Industrial power conversion
- BMS auxiliary power supplies
- Isolated communication power supplies
Specifications
- 40V maximum power transistor drain voltage
- 2.5V to 10V VIN input voltage range
- 10kΩ minimum external resistor on VCS
- -40°C to +125°C operating ambient temperature range
- 94µA to 106µA steady-state current range
- 200nS to 400nS sampling delay time range
- 30mΩ to 45mΩ typical power transistor on-resistance range
- Over-temperature protection
- +145°C to +175°C threshold range
- 20°C hysteresis
- +150°C maximum junction temperature
- Typical thermal resistance
- 62.5°C/W junction-to-ambient
- 3.1°C/W junction-to-case
- ESD ratings
- ±2000V Human Body Model (HBM) per ESDA/JEDEC JS-001-2017
- ±1000V Charged Device Model (CDM) per ESDA/JEDEC JS-002-2014
Simplified Schematic
Functional Block Diagram
