RVSW013 Series

  • 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 0.1uA
  • Internally Integrated Self-power Supply Circuit
  • QFN5x5 Package with Strong Heat Dissipation

The RVSW013 is a dedicated controller for bidirectional converters, integrating a power MOSFET with an ultra-low on-resistance of 30mΩ. 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.

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.

  Part Number Power (W) Vin (V) Vout 1 (V) Iout 1 (mA) Isolation (kV)
1 RECOM | RVSW013-FJ-CT | IC, SMD (pinless)
Focus New
2.5 - 10
2 RECOM | RVSW013-FJ-R | IC, SMD (pinless)
Focus New
2.5 - 10

Solutions based on this IC/Transformer combination (available board mounted or as individual components)

  Part Number Power (W) Isolation (kV) Vin (V) Main Vout (V) Primary IC Transformer Secondary IC
1
New
6 6 16 - 32 2.5 to 4
Attributes RVSW013
Product Category IC
Vin (V) 2.5 - 10
Main Vout (V) 2.5 to 10
Output Voltage Range (V) 2.5 - 10
MAX Iout (mA) 6
Mounting Type SMD (pinless)
Package Style QFN5x5
Length (mm) 5.1
Width (mm) 5.1
Height (mm) 0.8
MIN Operating Temp (°C) -40
MAX Operating Temp (°C) 125
Protections OCP, OTP
Directives Halogen-free, REACH, RoHS 2+ (10/10)
Operating Modes Current Mode
Warranty 1 Year
Config 1 Channel
Topology Flyback Bidirectional
Number of Phases 1
MAX Duty Cycle (%) 84
Functional Features Bidirectional Mode, Enable, Synchronous Rectification, Variable Switching Frequency
MIN Switching Frequency (kHz) 1.4
MAX Switching Frequency (kHz) 360
MIN Storage Temperature (°C) -55
MAX Storage Temperature (°C) 150
  Part Number Power (W) Vout 1 (V) Vin (V) Mounting Type
1 RECOM | RVSW013-FJ-CT | IC, SMD (pinless)
Focus New
2.5 - 10 SMD (pinless)
2 RECOM | RVSW013-FJ-R | IC, SMD (pinless)
Focus New
2.5 - 10 SMD (pinless)

Documents & Media

Title Type Date
RVSW013.pdf Datasheet
Important parameters include input voltage range, output voltage, maximum load current, switching frequency, efficiency, size, and thermal performance. Selection involves balancing these factors to meet the specific requirements of your application, ensuring the IC operates within its safe thermal and electrical limits while minimizing PCB space.
A boost converter increases the input voltage to a higher output voltage using an inductor, low-side switch, a rectifier, and output filter.
A buck converter reduces the input voltage to a lower output voltage using a high-frequency high-side or low-side switch, an inductor, a rectifier, and output filtering.
A buck‑boost converter can both increase and decrease the output voltage in relation to the input voltage using one or more inductors, a high-side or a low-side switch, rectifiers, and output filtering.
A DC/DC controller IC manages the switching behavior of external power components such as MOSFETs, inductors, and transformers.
A DC/DC converter IC converts one DC voltage level to another using switching techniques and integrated control circuitry.
A synchronous converter replaces the traditional rectifier diode with a MOSFET, which reduces conduction losses and significantly improves efficiency.
An asynchronous converter uses a diode as the rectification element, resulting in a simpler design but typically lower efficiency compared to synchronous alternatives.
A converter IC typically integrates the power switches internally, providing a more compact solution. In contrast, a controller IC manages the switching behavior of external power components such as MOSFETs, inductors, and transformers.
Buck-boost converters are commonly used when the input voltage can vary above and below the desired output voltage. For example, this topology is ideal for maintaining a 12V fixed voltage from a 12V battery supply, where the battery level may fluctuate during discharge or charging.
Push-pull and full bridge topologies are often unregulated, making them best suited for use with regulated input voltage rails. Push-pull is preferred for 3.3V and 5V input voltage rails because the input current is shared between the switching transistors, allowing more power to be extracted from a smaller IC package. Full Bridge is preferred for 5V up to 24V input voltage rails because the input voltage stress is shared between the switching transistors, enabling it to efficiently switch higher input voltages. For regulated output voltages, wider input voltage ranges, or higher output power applications, Flyback is the preferred topology due to its versatility and ability to provide galvanic isolation.
Power ICs enable efficient switching topologies, optimized control algorithms, and fast switching frequencies that minimize power losses.
Key advantages include high integration, a small footprint, and improved efficiency. Integrated power ICs allow designers to create optimized power solutions tailored specifically for unique applications.
Power ICs typically require more external components and careful PCB design. This requirement for additional external parts and complex layout increases overall development complexity.
Common types include DC/DC converter ICs, PWM controller ICs, gate driver ICs, PMICs, linear regulators, and battery management ICs.
Power ICs are used in industrial electronics, telecom systems, consumer electronics, automotive systems, and IoT devices.
A power IC (power integrated circuit) is a semiconductor device designed to regulate or convert electrical power. It integrates essential functions such as feedback regulation, switching control, protection, and power management into a single chip.
A PMIC is an integrated circuit designed to manage power distribution within complex electronic systems. It typically integrates multiple voltage regulators, power sequencing, battery management, and system monitoring functions into a single semiconductor device.
A power IC is a semiconductor controller chip that requires external magnetic components such as inductors or transformers but often includes integrated power switching transistors. A power module integrates many of these discrete components into a single packaged solution, simplifying PCB design and reducing overall development time.
Power switching transistors differ primarily in how they are controlled, their switching speed, maximum switching voltage, and their power-handling limits. The main types include MOSFETs (up to 100kHz, 600V, 1kW), SiCs (up to 500kHz, 3.3kV, 100kW), GaNs (up to 1MHz, 900V, 10kW), and IGBTs (up to 50kHz, 6.5kV, 1MW).

MOSFETs are most often used in switching power supplies due to their low cost and ease of integration. SiCs and GaNs are utilized for high-frequency switching applications, while IGBTs are preferred for very high power or high-voltage switching.
Power ICs are often utilized when designers require maximum flexibility, lower cost at high volumes, or highly customized power architectures.