Features
- Integrated secondary-side controller with zero standby power capability
- Secondary-side regulation
- Integrated synchronous rectifier controller
- NFET driver for disconnect function
- Zero Standby Power (ZSP) mode
- Supports up to 7A of current, 21V output voltage
- TDFN-14 package enables single-sided PCB designs for lower-cost power supplies
- Intelligent, standby power mode
- Built-in digital loop compensation reduces external component count
- Supports both DCM and CCM operation
- Rich protection for:
- Overvoltage (OVP)
- Overcurrent (OCP)
- User-configurable over-temperature
Description
The iW690 integrates a synchronous rectifier (SR) controller, secondary-side regulation controller, and a unique zero standby power (ZSP) mode into one device for power supplies up to 140W+ with excellent active mode efficiency and zero standby power capability at no load. The ZSP mode enables systems with long periods of inactivity to reduce the power supply consumption to < 5mW by putting the iW690 into an ultra-low power consumption mode. The iW690, in turn, communicates to the ZSP-compatible primary-side controller (iW9860, iW9870) to put that device also into an ultra-low standby power mode, reducing the total power consumption to < 5mW, while making it instantly available when the ZSP mode is disabled.
The iW690 supports adaptive synchronous rectifier control and drive for optimal efficiency and drives an N-channel disconnect switch to disconnect the power supply from the output during zero standby power mode, making the solution to reduce the power consumption low-cost and easy to design. Fully digital voltage compensation eliminates the need for external passive components for loop compensation.
Parameters
| Attributes | Value |
|---|---|
| Function | Integrated Regulation, Synchronous Rectifier Controller |
Package Options
| Pkg. Type | Lead Count (#) |
|---|---|
| TDFN-14L | 14 |
Applications
- Zero Standby Power AC/DC power supplies for TVs, monitors, and appliances