Datasheet > iW662

iW662

更新时间： 2024-11-15 14:57:55

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
7页	558K
描述
Integrated Secondary-Side Synchronous Rectifier Controller and RapidCharge? Interface IC for Qualcomm? Quick Charge? 3.0 and 2.0 Applications

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iW662 数据手册

iW662

AC/DC Secondary-Side Synchronous Rectiﬁcation and Rapid Charge^TM

Interface Controller for Qualcomm^®Quick Charge™ 3.0

1 Description

The iW662 is an AC/DC secondary-side combo controller for Qualcomm^®Quick Charge^TM3.0 (QC3.0) which includes

USB interface, secondary-to-primary communication and synchronous rectiﬁcation functions in a single IC.

The iW662 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 mobile

device (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 iW662 uses Dialog’s proprietary XM-Comm secondary-to-primary digital communication technology. When paired

with one of Dialog’s primary-side controllers, the iW1790 or iW1796, the optocoupler can be completely eliminated in the

system. The iW662 transmits all necessary information for rapid charge through the power transformer, including output

voltage requests, output current limits, output voltage undershoot, output over-voltage, and fault and reset signals.

The iW662 is also an advanced synchronous rectiﬁer (SR) controller with an integrated MOSFET driver, enabling

discontinuous mode ﬂyback converters with high eﬃciency operation. The device works with an external power

MOSFET to replace the main rectifying diode on the secondary of a ﬂyback converter, improving eﬃciency by reducing

secondaryside conduction losses. Dialog’s digital adaptive turn-oﬀ control technology minimizes turn-oﬀ deadtime,

eliminating the need for an additional Schottky diode that is typically needed in parallel with the synchronous MOSFET

in conventional synchronous rectiﬁers.

The iW662 and iW1790/iW1796 provide double-layer cable protection. On the secondary side, the iW662 incorporates

Dialog’s proprietary D+/D- over-voltage protection to address V_BUSD+/D- soft shorts. On the primary side, the iW1790/

iW1796 uses Dialog’s advanced fault control technology to reduce the average output power during soft shorts without

latch.

Qualcomm^®Quick Charge^TM3.0 is a product of Qualcomm Technologies, Inc.

2 Features

Primary side (iW1790/iW1796): advanced fault

control technology reduces average output power

at fault conditions without latch

● XM-Comm proprietary secondary-to-primary digital

communication transmits all information for rapid

charge without an optocoupler: output voltage

requests, output current limits, output voltage

undershoot, over-voltage protection, and other fault

and reset signals

● Adaptive OVP/UV detection for most V_BUSlevels

● Backward compatible with QC2.0 and USB Battery

Charging Speciﬁcation Revision 1.2 (USB BC1.2)

● Lossless MOSFET V_DSsensing for SR timing control

● Wide operating voltage range from 3V to 16V

with digital adaptive turn-oﬀ control

● Programmable active fast discharge from a high

voltage to 5V at MD unplug or from a high voltage

level to a lower level upon request with built-in switch

or external switch

● Optimized 5V MOSFET gate driver

● High-voltage drain sensing up to 100V with no

additional external clamping circuits required

● Supports Qualcomm^®Quick Charge^TM3.0 technology

High Voltage Dedicated Charging Port (HVDCP) to

provide V_BUSfrom 3.6V to 12V in 200mV increments

● Intelligent low power mode enables < 20mW no-load

power consumption

● 8-Lead SOIC package

● Double-layer cable protection:

Secondary side (iW662): Proprietary D+/D- over-

voltage protection (OVP) addresses V_BUSD+/D-soft

shorts

09-Feb-2022

Product Summary

Rev. 1.3

1 of 7

www.renesas.com

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