iW1782
Rapid Charge™ AC/DC Digital
Quasi-Resonant PWM Controller
1 Description
The iW1782 is a high performance AC/DC power supply controller for rapid charge that uses digital control technology
to build peak-current mode PWM flyback power supplies. The device operates in quasi-resonant mode to provide high
efficiency and a number of key built-in protection features. The iW1782 can achieve tight multi-level constant voltage
and multi-level constant current regulation without a traditional secondary-feedback circuit. It also eliminates the need
for loop compensation components while maintaining stability over all operating conditions.
The iW1782 is optimized to work with Dialog’s iW636 secondary-side controller for Qualcomm® Quick Charge™ 3.0
(QC3.0) technology, to achieve fast and smooth voltage transition upon request by mobile devices (MD). When paired
with the iW636, the iW1782 eliminates the discrete decoders on the primary side, minimizes the external component
count and simplifies system designs. The iW636 can communicate with the iW1782 through one opto-coupler for
all the necessary rapid charge information including output voltage requests, output current limits, output voltage
undershoot and output over-voltage.
Dialog’s innovative proprietary technology ensures that power supplies designed with the iW636 and iW1782 can
provide 5V/9V/12V output voltage configuration for QC2.0 and other proprietary protocols and 3.6V to 12V in 200mV
increments for QC3.0, with user-selected various output current limit combinations. Furthermore, the chipset can
achieve <10mW no-load power consumption at 5V2A output setting and fast dynamic load response in typical AC/DC
rapid charge adapter designs.
2 Features
● Supports rapid charge technologies such as
Qualcomm® Quick Charge™ 3.0 (QC3.0) technology
to provide 3.6V to 12V in 200mV increments with user-
selected various output current limit combinations
● Proprietary optimized load adaptive maximum
constant frequency PWM switching with quasi-
resonant operation achieves best size, efficiency, and
common mode noise
● Proprietary secondary-to-primary digital
● Multi-mode PWM/PFM control improves efficiency at
various load conditions
communication and built-in decoder eliminate discrete
decoder and significantly simplify system design
● User-configurable 4-level cable drop compensation
independent of output voltage
● Single opto-coupler for all the rapid charge information:
output voltage request, output current limit, output
voltage undershoot, and over-voltage protection
● EZ-EMI® design enhances manufacturability
● Built-in single-point fault protections against output
short-circuit including soft short and half short, output
over-voltage, and output over-current
● Tight multi-level constant-voltage and multi-level
constant-current regulation with primary-side feedback
and control
● SmartDefender™ smart hiccup technology
helps address issues of soft shorts in cables and
connectors by effectively reducing the average output
power at fault conditions without latch
● Ultra-low no-load power consumption with lowest
system cost (<10mW at 230VAC with typical 5V2A
setting using Schottky diode rectifier; <20mW at
230VAC with typical 5V2A setting using synchronous
rectifier)
● User-configurable external shutdown control
● No audible noise over entire operating range
● Fast dynamic load response (DLR) with secondary-
side load transient detection
3 Applications
● Rapid-charging AC/DC adapters for smart phones,
tablets and other portable devices (3.6V-12V, 1A-3A).
Qualcomm® Quick ChargeTM 3.0 is a product of Qualcomm Technologies, Inc.
11-August-2017
Product Summary
Rev. 1.3
www.dialog-semiconductor.com
1 of 6
© 2017 Dialog Semiconductor
5秒后页面跳转
ADXL345传感器工作原理、参数分析、引脚说明
一文带你了解，DAC0832工作原理、输出电压范围、分辨率等参数
ACS712电流检测使用指南及资料手册参数分析
TLP521资料手册解读：参数分析、引脚说明、典型电路
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
