Datasheet > iW9870

iW9870

更新时间： 2024-11-15 15:19:15

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
7页	570K
描述
GaN Digital Quasi-Resonant AC/DC Flyback Controller for Zero Standby Power RapidCharge? Power Supplies up to 140W

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iW9870 数据手册

Speciﬁcations in this document are tentative and subject to change

Preliminary Product Summary

iW9870

Zero Standby Power AC/DC Digital Quasi-Resonant Flyback GaN Controller for RapidCharge^TM

The iW9870 is a high-performance AC/DC primary-side

digital ﬂyback controller for secondary-side regulation

Features

▪ Zero standby power consumption with low system

(SSR) that can enable zero standby power consumption

in 15W-63W rapid charge applications. The device

operates in the Renesas’ patented constant-frequency,

quasi-resonant (QR) switching mode and adaptive

multi-mode control (MMC). The iW9870 is optimized

to work with Renesas’ secondary-side controller, the

iW760, which integrates SSR, synchronous rectiﬁcation

(SR) control and USB Power Delivery (PD) 3.0 with

Programmable Power Supply (PPS) support. A

typical 25W USB PD travel adapter (TA) built with the

iW9870 and iW760 chipset can meet no-load power

consumption of less than 5mW when the output USB

cable is detached.

cost (< 5mW at 230V_ACwhen output USB cable is

detached in a typical 25W USB PD travel adapter)

▪ Supports single-layer PCB design to reduce total

system cost

▪ Supports Rapid Charge adapters applications of

15W-63W and other power proﬁles

▪ Uses Renesas’ patented switching modes [adaptive

quasi-resonant (QR) operation and adaptive multi-

mode control (MMC)] and continuous conduction

mode (CCM)

▪ Improves eﬃciency and eliminate audible noise

▪ Enables optimization for size, eﬃciency and EMI

The iW9870’s unique MMC mode of operation includes

PWM, PFM and burst mode, which optimizes ﬂyback

converter performance including eﬃciency and EMI.

And it also provides a number of key built-in protection

features. The iW9870 and iW760 chipset can achieve

tight multi-level constant voltage (CV) and multi-level

constant current (CC) regulation in high resolution

steps, with fast and smooth CV/CC transition upon

request by mobile devices (MD). With SSR digital

compensation, the chipset eliminates the need

performance

▪ Supports voltage sensing with dual polarity of V_VCC

auxiliary winding for improving EMI and simplifying

transformer design

▪ Optimized gate drive for GaN power devices

▪ Supports constant-voltage (CV) and constant-current

(CC) regulation in ﬁne steps using secondary-side

regulation (SSR) control

▪ Supports high switching frequency up to 270kHz for

driving GaN power device (by product option - see

section 7)

for external loop compensation components while

maintaining stability under all operation conditions.

▪ Built-in single-point fault protections against AC line

voltage brown-in, brown-out, output short-circuit,

output over-voltage, and optocoupler failure

Besides zero standby power, Renesas’ innovative

proprietary technology ensures that power supplies

designed with the iW9870 and iW760 chipset can

achieve high eﬃciency, high accuracy voltage/current

control and fast dynamic load response, all with the

▪ User adjustable internal OTP threshold for various

thermal requirements

lowest system cost.

▪ 6-lead SOT-23 package supports compact power

supply design

Applications

▪ Rapid-charging AC/DC adapters for smart phones,

tablets, power tools and other portable devices

Page 1

Doc Number Rev.0.01

May 18, 2023

12 3 4 5 6 7

中文翻译

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