1 Description
The iW636 is an AC/DC secondary-side controller for USB interface supporting Qualcomm Quick Charge 3.0 (QC3.0) technology and secondary-to-primary communication protocol, to enable rapid charging of QC3.0/QC2.0-enabled
mobile devices (MDs). The iW636 resides on the secondary side of an AC/DC power supply and allows the adapter to be configured for multi-level output voltages from 3.6V to 12V in 200mV increments, depending on the voltage requested by the MD. It can be used in Dialog’s primary-side controlled AC/ DC systems to achieve fast voltage
transition, low no-load power consumption, and fast dynamic load response.
The iW636 implements Dialog’s proprietary secondary-to-primary digital communication technique. When paired with Dialog’s primary-side iW1782 controller, the iW636 eliminates the discrete decoders on the primary side, simplifying
system designs. It uses one opto-coupler to transmit all the necessary information for rapid charging, including output
voltage requests, output current limits, output voltage undershoot, output over-voltage, and fault and reset signals.
It also has a built-in opto-coupler LED driver to minimize the bill of material cost.
The iW636 and iW1782 provide double-layer cable protection. On the secondary side, the iW636 incorporates Dialog’s proprietary D+/D- over-voltage protection to address VBUS D+/D- soft shorts. On the primary side, the iW1782 uses Dialog’s SmartDefenderTM advanced hiccup technology to reduce the average output power during soft shorts without latch.
Dialog’s innovative, proprietary technology ensures that power supplies designed with the iW636 and iW1782 can provide multi-level output voltage configuration, with user-selected various output current limit combinations.
Additionally, the chipset can achieve <10mW no-load power consumption at 5V, 2A output setting and fast dynamic load response in typical AC/DC rapid charge adapter designs.
2 Features
● Supports Qualcomm® Quick ChargeTM 3.0 technology
High Voltage Dedicated Charging Port (HVDCP) to
provide VBUS from 3.6V to 12V in 200mV increments
● Double-layer cable protection:
x Secondary side (iW636): Proprietary D+/D- overvoltage
protection (OVP) addresses VBUS D+/Dsoft shorts
x Primary side (iW1782): 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 opto-coupler transmits all information for
rapid charge: output voltage requests, output current
limits, output voltage undershoot (UV), over-voltage
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 MD unplug or upon
request with built-in switch or external switch
● Normally OFF state with <150μA 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 opto-coupler LED driver with minimum driving current of 2mA
● 6-lead SOT-23 package