Datasheet > iW3620

iW3620

更新时间： 2023-12-20 18:44:36

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
21页	1405K
描述
Digital Offline 40W PWM Controller with PrimAccurate? Primary-Side Control for LED Driving

阅读下载

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

iW3620 数据手册

iW3620

Digital PWM Current-Mode Controller for AC/DC LED Driver

8.0 Fꢂnctionꢁl Block Diꢁꢅꢃꢁm

Start-up

ENABLE

ADC

V_{IN_A}

5 kΩ

Vin

0.2 V ~ 2.0 V

Gate

Driver

OUTPUT

VMS

Digital

Logic

Control

Signal

Conditioning

60 kΩ

SENSE

I_SD

Detection Switch

–

SENSE

1.1 V

OCP

–

DAC

V_SD-TH

R_SD

PEAK

–

IPK

GND

0 V ~ 1 V

Figure 8.1 : iW3620 Functional Block Diagram

9.0 Thꢀoꢃꢆ of Opꢀꢃꢁtion

The iW3620 is a digital controller which uses a proprietary

primary-side control technology to eliminate the opto-isolated

feedback and secondary regulation circuits required in

traditional designs. This results in a low-cost solution for

AC/DC adapters. The iW3620 uses Critical Discontinuous

Conduction Mode (CDCM) or Pulse Width Modulation

(PWM) mode at high output power levels and switches to

Pulse Frequency Modulation (PFM) mode at light load to

minimize power dissipation to meet EPA 2.0 speciﬁcation.

Furthermore, iWatt’s digital control technology enables fast

dynamic response, tight output regulation, and full featured

circuit protection with primary-side control.

control algorithm to reduce system design time and improve

reliability.

Furthermore, accurate secondary constant-current operation

is achieved without the need for any secondary-side sense

and control circuits.

The built-in protection features include overvoltage protection

(OVP), output short circuit protection (SCP) and soft-start,

AC line brown out, overcurrent protection, and Isense fault

protection. Also the iW3620 automatically shuts down if it

detects any of its sense pins to be either open or short.

iWatt’s digital control scheme is speciﬁcally designed to

address the challenges and trade-oﬀs of power conversion

design. This innovative technology is ideal for balancing new

regulatory requirements for green mode operation with more

practical design considerations such as lowest possible cost,

smallest size and highest performance output control.

Referring to the block diagram in Figure 8.1, the digital logic

control block generates the switching on-time and oﬀ-time

information based on the line voltage and the output voltage

feedback signal and provides commands to dynamically

control the external MOSFET current. The system loop is

compensated internally by a digital error ampliﬁer. Adequate

system phase and gain margin are guaranteed by design

and no external analog components are required for loop

compensation. The iW3620 uses an advanced digital

Rev. 1.9

iW3620

February 4, 2022

Page 7

1...4 5 678 9 10...21

下载PDF

与iW3620相关器件

型号	品牌	描述	获取价格	数据表
IW3620-00	DIALOG	Digital PWM Current-Mode Controller for AC/DC LED Driver	获取价格
iW3622	RENESAS	Single-Stage, 45W, Non-Dimmable Offline Flyback LED Driver with High PF and Low Ripple	获取价格
iW3623	RENESAS	Flickerless?, Non-Dimmable 45W Solid-State Lighting LED Driver with High PF (>0.95), Low T	获取价格
iW3625	RENESAS	Single-Stage, 45W, Non-Dimmable Offline Buck SSL LED Driver with High Power Factor and Low	获取价格
iW3626	RENESAS	Single-Stage, 10W Offline SSL LED Driver with High Power Factor and Low Ripple	获取价格
iW3627	RENESAS	Digital Constant-Voltage Offline PWM Controller with Power Factor Correction for Applicati	获取价格

产品中心

服务支持

精选活动

关于我们

帮助中心

iW3620

iW3620 数据手册

与iW3620相关器件

与iW3620相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

iW3620

iW3620 数据手册

与iW3620相关器件

与iW3620相关文章

您还可以找

您在本页遇到什么问题？