特長
- Integrated with 700V, 240mΩ 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
説明
The RRW21112 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. Its configurable light‑load mode allows the design to be tuned for ultra‑low no‑load power consumption or fast transient response using a single external resistor. The device operates in quasi‑resonant mode to improve efficiency at heavy loads while reducing external component count, simplifying EMI design, and lowering overall bill‑of‑materials cost.
PrimAccurate™ primary‑side regulation eliminates the need for secondary‑side feedback components while maintaining excellent line and load regulation. The digital control architecture removes external loop‑compensation requirements and uses pulse‑by‑pulse waveform analysis to achieve a faster dynamic response than traditional solutions. A built‑in power‑limit function supports transformer optimization across universal off‑line input ranges, and the RRW21112 is typically used for applications around the 45W.
The device enables high average active efficiency and no‑load power consumption below 75mW. Its soft‑start capability provides smooth startup into large capacitive loads at any output voltage, making it suitable for networking and monitor adapter applications.
The RRW21112 includes internal and external over‑voltage protection, with the external path providing supplemental output OVP for enhanced system robustness.
パラメータ
| 属性 | 値 |
|---|---|
| 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) | 45 |
| 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 |
パッケージオプション
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) |
|---|---|---|
| QFN8x8 | 8 x 8 x 0.85 | 22 |
製品比較
アプリケーション
- Power Adapters for Network Devices and Monitors
- Universal AC/DC Adapters (Up to 45W)
- Auxiliary Power