Summary of ZERO VOLTAGE SWITCHING CHIPSET SHRINKS HIGH-POWER-DENSITY POWER SUPPLY UNITS TO 100W AND BEYOND
The Dialog Semiconductor ZVS chipset enables compact, lightweight high-power-density PSUs (100W+) using Zero Voltage Switching, reducing size by 30–50%. It pairs the iW9801 primary controller with the iW709 secondary USB PD protocol IC (including synchronous rectifier controller and digital compensation), supports USB PD 3.0 with PPS and other protocols, operates up to 200 kHz, offers extensive protections and <20 mW standby, and lowers component count and BOM cost for travel adapters and portable-device chargers.
Parts used in the ZVS RapidCharge Project:
- Dialog iW9801 primary-side controller (ZVS RapidCharge)
- Dialog iW709 secondary-side USB PD protocol IC
- Synchronous rectifier controlled by iW709
- Transformer sized for up to 200 kHz switching
- Passive components (smaller inductors, capacitors, resistors)
- Power MOSFETs for primary-side switching
- Secondary-side rectification components
- Thermal sensing components for user-configurable over-temperature protection
- Protection circuitry for OVP, OCP, shoot-through, brown-in/brown-out, VSENSE/ISENSE short, output short
The innovative digital Zero Voltage Switching (ZVS) chipset from Dialog Semiconductor enables designers to reduce component size and BOM cost for delivering small form-factor, lightweight power supplies, including travel adapters for smartphones, tablets, laptops, power tools, and other portable devices. Targeting high power density PSUs with Zero Voltage switching technology, these new devices enable 100 Watt and beyond High Power Density (HPD) Power Supply Units (PSUs) that are 30-50% smaller than conventional high power PSUs.
The easy-to-use ZVS RapidCharge solution comes integrated with the iW9801 primary-side controller and the iW709 secondary-side USB PD protocol IC. Additionally, there is an integrated synchronous rectifier controller in the secondary-side iW709 further reduces the overall component count. This secondary-side digital compensation loop ensures stability and eliminates the need for extra compensation components.
The ZVS chipset solution enables customers to simply design higher power density chargers that are lightweight, ultra-small, and quite cost-effective. It offers robust protection for over-voltage (OVP), over-current (OCP), user-configurable over-temperature, shoot-through, brown-in/brown-out VSENSE/ISENSE short, output short, and extra primary-side OCP and OVP. Besides, low standby power of less than 20mW makes it an eco-friendly solution.
The chipset supports most fast charge protocols, including USB PD 3.0 with Programmable Power Supply (PPS) and other third-party proprietary protocols. With the option to employ switching frequencies up to 200 kHz, designers can use a much smaller and lighter transformer and smaller passive components thereby reducing the charger size and weight.
Read more: ZERO VOLTAGE SWITCHING CHIPSET SHRINKS HIGH-POWER-DENSITY POWER SUPPLY UNITS TO 100W AND BEYOND
- What does the ZVS chipset enable for power supplies?
It enables compact, lightweight high-power-density PSUs sized 30–50% smaller and supporting 100W and beyond. - Which primary and secondary ICs are included in the ZVS RapidCharge solution?
The solution includes the iW9801 primary-side controller and the iW709 secondary-side USB PD protocol IC. - Does the iW709 include any additional functions?
Yes, the iW709 includes an integrated synchronous rectifier controller and a secondary-side digital compensation loop. - What fast-charge protocols does the chipset support?
It supports most fast-charge protocols, including USB PD 3.0 with PPS and other third-party proprietary protocols. - Can designers use higher switching frequencies with this chipset?
Yes, the chipset allows switching frequencies up to 200 kHz to enable smaller transformers and passive components. - What protection features are provided by the chipset?
It provides protection for OVP, OCP, user-configurable over-temperature, shoot-through, brown-in/brown-out, VSENSE/ISENSE short, output short, and extra primary-side OCP and OVP. - How low is the standby power of the ZVS solution?
The standby power is less than 20 mW. - Does the ZVS approach reduce component count and BOM cost?
Yes, the ZVS RapidCharge solution reduces component count and BOM cost for small form-factor chargers.
