Features
- 25W Output
- AccuSwitch™ Integrated 700V Power MOSFET
- PrimAccurate™ Primary-Side Control
- No Optocoupler Needed
- Intelligent Digital Control Loop for Accurate Voltage Cross-Regulation
- Meets Global Energy Efficiency Standards
- Configurable Light Load Mode to Optimize No-Load Power Consumption and DLR
- <30mW to <75mW No-Load Power Consumption
- Works with the iW676 SR Controller with Active Voltage Positioning (AVP)
- AVP – Enables <30mW No-Load Power Consumption and Fast DLR
- Quasi-resonant Control for Optimal Efficiency
- Adaptively Controlled Soft Start-up
- Fast, Smooth Start-up into Large Capacitive Loads (up to 6,000µF)
- EZ-EMI™ Design
- Reduces Filtering Requirements
- Easily Meets Global EMI Specifications
- Fully Protected from Fault Conditions
- Built-In Over-Temperature Protection
- Output Overvoltage and Overcurrent Protection
- Sense-Resistor Short Circuit Protection
- Thermally Efficient SO-10 Batwing Package
Description
The iW1825 AccuSwitch™ digital PWM controller integrates a highly accurate control circuit with a 700V power MOSFET switch to provide a complete solution for off-line power conversion at up to 25W of output power.
Renesas' PrimAccurate™ primary-side digital control algorithms eliminate the need for failure-prone optocouplers and ensure excellent cross-regulation accuracy for multiple output designs, to enable the longer operating lifetime, high performance and reduced cost required for embedded, networking and home appliance applications.
The iW1825 has a configurable light load mode operation to enable optimization between no-load standby power and fast DLR. It can achieve <75mW at no load, with the fastest DLR setting and <30mW in the lowest setting. The iW676 synchronous rectifier controller with active voltage positioning can be used with the iW1825 to enable the lowest no-load standby power, fastest DLR and highest efficiency for 25W applications.
Parameters
| Attributes | Value |
|---|---|
| Topology Characteristic | Flyback |
| Control Mode | Primary-Side Regulation Peak Current Mode DCM |
| 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 |
| No Load Power (mW) | 75 |
| Controller / Integrated | Integrated |
| Advanced Features | AccuSwitch, EZ-EMI, PrimAccurate, SmartDefender, Optional Input OVP Feature |
| Temp. Range (°C) | -40 to +125°C |
| Qualification Level | Standard |
Package Options
| Pkg. Type | Lead Count (#) | Pitch (mm) |
|---|---|---|
| SO-10 Batwing | 10 | — |
| SO-10 Batwing | 10 | 1.27 |
Application Block Diagrams
|
MIDI Linked Illumination Controller
The MCU-driven system interprets MIDI to control LEDs, creating music-synced lighting.
|
|
1.2kW High-Voltage GaN Inverter
Efficient high-voltage GaN inverter with GaN-based PFC for industrial motor drives.
|
|
Heat Pump Control System
This heat pump system features motor control MCU, PLC, and Wi-Fi connectivity for optimized performance.
|
|
Smart Water Purifier System
Advanced water purifier system with UV filtering, smart alerts, and efficient power management features.
|
|
High Throughput Wi-Fi 6 Router
Achieve seamless, high-speed connectivity with an advanced Wi-Fi 6 router powered by Renesas.
|
Additional Applications
- Home Appliances
- Power Adapters
- Networking Power Supplies