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Secondary-Side USB Power Delivery 3.0 Interface IC Integrated with Synchronous Rectifier Controller and VBUS FET Driver
Pairs with iW9801 (100W Applications) or iW9809 (65W Applications) for Complete, Low Total BOM Cost Solution
The iW709 integrates a USB power delivery (USB PD) 3.0 interface controller with a synchronous rectifier (SR) controller and USB Type-C disconnect FETs into one device for low total BOM cost USB PD chargers and travel adapters.
The device pairs with the iW9801 to create Zero Voltage Switching (ZVS) power supplies for applications requiring up to 100W and the iW9809 to enable a two-chip solution for low total BOM cost USB PD applications to 65W.
The iW709 supports ZVS timing with adaptive SR control and drive for optimal efficiency, along with intelligent low power mode to enable very low no-load power consumption when paired with the iW980x products. Fully digital voltage compensation eliminates the need for external passive components for loop compensation.
A full array of protection features includes over-voltage and over-current and over-temperature protection circuits. The OTP protection has two independent protection circuits, one working with an external NTC resistor and the second using an internal temperature sensor that can derate the output power to keep the charger or adapter from overheating.
Fully integrated secondary-side controller for USB Power Delivery 3.0 with PPS
- Protocol interface
- Secondary-side regulation
- Integrated synchronous rectifier controller
- USB Type-C NFET driver for disconnect function
Supports USB PD 3.0 w/PPS and other RapidCharge protocols
100W power supply solutions when paired with the iW9801 ZVS primary-side controller
65W power supply solutions when paired with the iW9809 quasi-resonant primary-side controller
High resolution control over the output voltage and current
- 3.3V to 21V in 20mV steps
- 50mA output current steps
Built-in digital loop compensation to reduce external component count
Programmable fast discharge to 5V at adapter unplug or voltage request
Supports both DCM and CCM operation
Rich protection for:
- Over-voltage (OVP)
- Over-current (OCP)
- User-configurable over-temperature
- USB PD-based power derating
Intelligent, eco-friendly low standby power
Hardwired state-machine solution prevents hacking of fast chargers. Learn more
Low-cost, ultra-small, light-weight RapidCharge AC/DC power supplies and adapters for smartphones, tablets and other portable devices using USB PD