Dialog’s digital Zero Voltage Switching 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.
ZVS Solution Features
High switching frequency (up to 200kHz) enables:
- 更轻、更小的变压器
- 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
支持s fine step CV/CC regulation when paired with Dialog’siW709secondary-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:
- Over-voltage (OVP)
- Over-current (OCP)
- User-configurable over-temperature
- Shoot-through
- Brown-in/brown-out
- VSENSE/ISENSEshort
- Output short
- Extra primary side OCP & OVP if optocoupler fails
Intelligent, eco-friendly low standby power < 20mW
支持s USB Power Delivery 3.0 with PPS (iW709)
Integrated VBUS NFET driver (iW709)
支持s Direct Charge (iW709)
Hardwired state-machine solutions:prevent hacking of fast chargers
65W adapter using Dialog’s complete ZVS controller solution achieves 94% efficiency in a 50% smaller case.
Complete ZVS 2-chip solution for USB PD chargers
ZVS solution works with industry standard programmable references
Notes
All primary-side ICs (iW17xx & iW98xx) feature advanced cable fault protection
- USB-IF PD Certified (USB PD 3.0 + PPS):iW709&iW657P
- VBUSSwitch Driver: Integrated charge pump that drives an external N-channel MOSFET protects VBUSfrom output short-circuit damage and enables lower cost, easier sourcing vs P-channel
- ZVS: Zero Voltage Switching flyback technology
- SSR: Secondary-Side Regulation