Features
- Integrated with 700V, 480mΩ GaN FET
- External supplemental output over-voltage protection
- Adaptive soft‑start for smooth start‑up into 330µF to 6,000µF loads at 9V+ outputs
- Integrated protections: output short‑circuit, output over‑voltage, and output over‑current
- User‑configurable light‑load mode for optimized dynamic response and no‑load power
- <75mW no‑load power consumption at 230VAC in typical 24W designs
- PrimAccurate™ primary‑side regulation eliminates optocouplers
- Optimized 79kHz maximum PWM frequency with quasi‑resonant operation for improved size, efficiency, and noise
- EZ‑EMI™ design improves manufacturability and EMI margin
- Adaptive PWM/PFM multi‑mode control for higher efficiency
- Five‑level cable‑drop compensation
- Tight constant‑voltage regulation with optional constant‑current support
- SmartDefender™ hiccup protection for soft‑short conditions
- Optional internal over‑temperature protection
- No audible noise across the full operating range
- QFN 8×8 package
Description
The RRW21115 is a System‑in‑Package (SiP) product that integrates a 700V SuperGaN® FET with a high‑performance digital AC/DC primary‑side regulation (PSR) flyback controller. A configurable light‑load mode allows designers to optimize the system for ultra‑low no‑load power consumption or fast transient response through a single external resistor. Operating in quasi‑resonant mode, the device delivers high efficiency at heavy loads while minimizing external component count, simplifying EMI design, and reducing overall bill‑of‑materials cost.
PrimAccurate™ primary‑side regulation removes the need for secondary‑side feedback components and maintains excellent line and load regulation. The digital control architecture eliminates external loop‑compensation components and uses pulse‑by‑pulse waveform analysis to achieve a faster dynamic response than traditional approaches. A built‑in power‑limit function supports transformer optimization across universal off‑line input ranges, and the RRW21115 is typically used for applications around 25W.
The device enables high average active efficiency and no‑load power consumption below 75mW. Soft‑start functionality ensures smooth startup into large capacitive loads at any output voltage, making it well‑suited for networking and monitor adapter designs.
The RRW21115 incorporates internal and external over‑voltage protection, with the external path providing supplemental output OVP for additional system protection.
Parameters
| Attributes | Value |
|---|---|
| Topology Characteristic | PWM/PFM Flyback |
| Control Mode | Primary-Side Regulation with Adaptive MMC |
| UVLO Rising (V) | 13.7 |
| UVLO Falling (V) | 6.4 |
| VBIAS (Max) (V) | 18 |
| PWMs (#) | 1 |
| Output Power Max (W) | 25 |
| Switching Frequency (KHz) | 79 - 79 |
| Cable Drop Comp (mV) | 0 |
| Controller / Integrated | Integrated |
| Advanced Features | SuperGaN Integrated |
| Simulation Model Available | No |
| Temp. Range (°C) | -40 to +150°C |
| Qualification Level | Standard |
Package Options
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) |
|---|---|---|
| QFN8x8 | 8 x 8 x 0.85 | 22 |
Product Comparison
Applications
- Power Adapters for Network Devices and Monitors
- Universal AC/DC Adapters (Up to 25W)
- Auxiliary Power