Datasheet > IW1696-03

IW1696-03

更新时间： 2024-01-16 09:11:28

品牌	Logo	应用领域
DIALOG		开关
页数	文件大小	规格书
11页	979K
描述
Low-Power Off-line Digital Green-Mode PWM Controller

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技术参数
数据手册

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IW1696-03 技术参数

生命周期：	Transferred	包装说明：	,
Reach Compliance Code：	unknown	风险等级：	5.68
Base Number Matches：	1

IW1696-03 数据手册

iW1696

Low-Power Off-line Digital Green-Mode PWM Controller

1.0 Features

● Primary-side feedback eliminates opto-isolators and

2.0 Description

The iW1696 is a high performance AC/DC power supply

controller which uses digital control technology to build peak

current mode PWM ﬂyback power supplies. The device

directly drives a power BJT and operates in quasi-resonant

mode to provide high efﬁciency along with a number of key

built-in protection features while minimizing the external

component count, simplifying EMI design and lowering the

total bill of material cost. The iW1696 removes the need

for secondary feedback circuitry while achieving excellent

line and load regulation. It also eliminates the need for loop

compensation components while maintaining stability overall

operating conditions. Pulse-by-pulse waveform analysis

allows for a loop response that is much faster than traditional

solutions, resulting in improved dynamic load response. The

built-in power limit function enables optimized transformer

design in universal off-line applications and allows for a wide

input voltage range.

simpliﬁes design

● Adaptive multi-mode PWM/PFM control improves

efﬁciency

● Quasi-resonant operation for highest overall efﬁciency

●

EZ-EMI ^®design to easily meet global EMI standards

● Direct drive of low-cost BJT switch

● Dynamic base current control

● Very tight constant voltage and constant current

regulation with primary-side-only feedback

● No external compensation components required

● Complies with EPA 2.0 energy-efﬁciency speciﬁcations

with ample margin

● Able to meet < 30 mW no load power consumption

● Low start-up current (10 μA typical)

● Built-in soft start

The ultra-low start-up power and operating current at light

load ensure that the iW1696 is ideal for applications targeting

the newest regulatory standards for average efﬁciency.

● Built-in short circuit protection and output overvoltage

3.0 Applications

protection

● Built-in current sense resistor short protection

● No audible noise over entire operation range

● Low power AC/DC adapter/chargers for cell phones,

PDAs, digital still cameras

● Linear AC/DC replacement

OUT

GND

iW1696

OUTPUT

GND

SENSE

Figure 3.1: iW1696 Typical Application Circuit

Rev. 2.0

iW1696

FebRuaRy 13, 2012

Page 1

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