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High Frequency Operation Reduces Power Supply Size
The iW9802 digital AC/DC controller integrates Dialog’s patented adaptive Zero Voltage Switching (ZVS) technology to enable ultra-small, light-weight, low-cost and easily portable power supplies for any AC-powered product. The device operates at high switching frequencies, which allows for a much smaller transformer and passive components, and it can work with a wide variety of third-party controllers, including the industry standard programmable reference (TL431) to implement fixed-voltage or adjustable output power supplies for RapidCharge applications.
The iW9802 provides high efficiency, high voltage and current control accuracy. The device offers advanced protection features for current and voltage protection and includes primary-side control over-voltage and over-current protection circuits in the event that secondary-side protections fail, making power supplies using the iW9802 extremely robust.
Learn more about Dialog's patented adaptive ZVS technology.
Lifecycle status
● Active
Features
High switching frequency
- Lighter, smaller transformer
- Smaller passive components for easier EMI control
Patented adaptive ZVS control for high efficiency and low EMI
- Efficiently recycles energy to minimize heat generation
- Up to 94% efficiency
User-configurable ZVS timing optimizes performance for different power MOSFETs
Adaptive, seamless multi-mode control (MMC) improves efficiency and eliminates audible noise
AC unplug detection and X-cap discharge
Rich protection for:
- Over-voltage (OVP)
- Over-current (OCP)
- User-configurable over-temperature
- Shoot-through
- Brown-in/brown-out
- VSENSE/ISENSE short
- Output short
- Extra primary-side OCP & OVP if optocoupler fails
Hardwired state-machine solution prevents hacking of fast chargers. Learn more
Applications
100W+ USB PD power supplies with third party PD controllers
D+, D- proprietary protocol RapidCharge protocol chargers
Power tools
Industrial power supplies
Network communication equipment
Laptop power supplies
Block Diagrams
Typical applications diagram
Functional block diagram
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