Renesas' digital Zero Voltage Switching (ZVS) solutions can shrink 100W+ chargers up to 50% at low total BOM cost.
Our patented ZVS technology solves the thermal constraints associated with the AC/DC converter efficiency while reducing component size to enable high power density in an ultra-compact, light-weight charger form factor.
The 65W adapter using Renesas' complete ZVS controller solution achieves 94% efficiency in a 50% smaller case.
Featured Products
Product | Description |
---|---|
iW709 | Secondary-Side USB Power Delivery 3.0 Interface IC Integrated with Synchronous Rectifier Controller and VBUS FET Driver |
iW9801 | 100W Digital Zero Voltage Switching RapidCharge™ AC/DC Controller |
iW9802 | 100W Digital Zero Voltage Switching RapidCharge™ AC/DC Controller |
ZVS Solution Features
- High switching frequency (up to 200kHz) enables:
- 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
- Patented adaptive, seamless multi-mode control (MMC) improves efficiency and eliminates audible noise
- Supports fine step CV/CC regulation when paired with Renesas' iW709 secondary-side controller or with TL431
- Drives GaN devices via OUTPUT pin directly or external GaN driver
- Best for output power from 20W to 100W+
- AC unplug detection and X-cap discharge
- Rich protection for:
- Overvoltage (OVP)
- Overcurrent (OCP)
- User-configurable over-temperature
- Shoot-through
- Brown-in/Brown-out
- VSENSE/ISENSE short
- Output short
- Extra primary side OCP and OVP if optocoupler fails
- Intelligent, eco-friendly low standby power <20mW
- Supports USB Power Delivery 3.0 with PPS (iW709)
- Integrated VBUS NFET driver (iW709)
- Supports Direct Charge (iW709)
- Hardwired state-machine solutions: Prevent hacking of fast chargers
Notes
All primary-side ICs (iW17xx and iW98xx) feature advanced cable fault protection.
- USB-IF PD Certified (USB PD 3.0 + PPS): iW709 and iW657P
- VBUS Switch Driver: Integrated charge pump that drives an external N-channel MOSFET protects VBUS from output short-circuit damage and enables lower cost, easier sourcing vs. P-channel
- ZVS: Zero Voltage Switching flyback technology
- SSR: Secondary-Side Regulation