AC/DC Secondary-Side Controller for Qualcomm® Quick Charge™ 3.0 USB Interface
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Overview
Description
The iW636 is a Rapid Charge™ secondary-side controller for USB interface supporting Qualcomm® Quick Charge™ 3.0 (QC3.0) technology and secondary-to-primary communication protocol, that works with the iW1782 or iW1780H primary-side AC/DC digital controller to enable rapid charging of QC3.0/QC2.0-enabled mobile devices.
The iW636 integrates an optocoupler driver that relays commands to the iW1782 or iW1780H AC/DC controllers. These chipsets provide efficiency as high as 90% to enable the higher power density needed for small form factor fast charging adapters. It also uses Renesas' SmartDefender™ smart hiccup technology to help address soft shorts in cables and connectors.
Qualcomm Quick Charge is a product of Qualcomm Technologies, Inc.
Features
- Supports Qualcomm Quick Charge 3.0 technology High Voltage Dedicated Charging Port (HVDCP) to provide VBUS from 3.6V to 12V in 200mV increments
- Double-layer cable protection:
- Secondary side (iW636): Proprietary D+/D- overvoltage protection (OVP) addresses VBUS D+/Dsoft shorts
- Primary side (iW1782 or iW1780H): SmartDefender™ smart hiccup technology reduces average output power at fault conditions without latch
- Proprietary secondary-to-primary digital communication eliminates discrete decoders in the primary side and simplifies system designs
- Single optocoupler transmits all information for rapid charge: Output voltage requests, output current limits, output voltage undershoot (UV), overvoltage protection (OVP), and fault and reset signals
- Adaptive OVP/UV detection for most VBUS levels
- Backward compatible with QC2.0 and USB Battery Charging Specification Revision 1.2 (USB BC1.2)
- Pin-to-pin compatible with iW626
- Programmable active fast discharge from a high voltage VBUS level to 5V at mobile device unplug or upon request with built-in switch or external switch
- Normally OFF state with <150 µA cut-off current during 5V steady-state operation to achieve <10mW overall system no-load power consumption
- Wide operating voltage range from 3V to 16V
- Built-in optocoupler LED driver with minimum driving current of 2mA
Applications
- Rapid charging AC/DC adapters for smart phones, tablets and other portable devices
Design & Development
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
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