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IW1691-03

更新时间： 2024-11-24 00:54:51
品牌 Logo 应用领域
DIALOG 开关光电二极管
页数 文件大小 规格书
24页 2026K
描述
Digital PWM Current-Mode Controller for Quasi-Resonant Operation

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中文翻译

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IW1691-03 技术参数

是否Rohs认证： 符合生命周期：Active
包装说明：SOIC-8Reach Compliance Code：unknown
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.67模拟集成电路 - 其他类型：SWITCHING CONTROLLER
控制模式：CURRENT-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：16 V标称输入电压：12 V
JESD-30 代码：R-PDSO-G8长度：4.9 mm
湿度敏感等级：1功能数量：1
端子数量：8最高工作温度：85 °C
最低工作温度：-40 °C封装主体材料：PLASTIC/EPOXY
封装代码：SOP封装形状：RECTANGULAR
封装形式：SMALL OUTLINE峰值回流温度（摄氏度）：NOT SPECIFIED
座面最大高度：1.75 mm表面贴装：YES
最大切换频率：140 kHz温度等级：INDUSTRIAL
端子形式：GULL WING端子节距：1.27 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：3.9 mmBase Number Matches：1

IW1691-03 数据手册

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iW1691  
Digital PWM Current-Mode Controller for Quasi-Resonant Operation  
1.0 Features  
2.0 Description  
● Primary-side feedback eliminates opto-isolators and The iW1691 is a high performance AC/DC power supply  
simplifies design  
controller which uses digital control technology to build  
peak current mode PWM flyback power supplies. The  
device operates in quasi-resonant mode at heavy load 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 iW1691 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 over all 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  
current limit function enables optimized transformer design  
● Quasi-resonant operation for highest overall efficiency  
● EZ-EMI ® design to easily meet global EMI standards  
● Up to 130 kHz switching frequency enables small  
adapter size  
● Built-in cable drop compensation  
● Very tight output voltage regulation  
● No external compensation components required  
● Complies with CEC/EPA no-load power consumption  
and average efficiency regulations  
● Built-in output constant-current control with primary-side in universal off-line applications over a wide input voltage  
feedback  
range.  
● Low start-up current (10 µA typical)  
● Built-in soft start  
The ultra-low operating current at light load ensures that  
the iW1691 is ideal for applications targeting the newest  
regulatory standards for average efficiency and standby  
● Built-in short circuit protection and output overvoltage  
power.  
protection  
● Optional AC line under/overvoltage protection  
● PFM operation at light load  
3.0 Applications  
● AC/DC adapter/chargers for cell phones, PDAs, digital  
still cameras  
● Current sense resistor short protection  
● AC/DC adapters for consumer electronics  
● Overtemperature Protection  
L
N
V
OUT  
+
+
RTN  
+
1
2
8
7
NC  
V
V
CC  
OUTPUT  
SENSE  
V
I
3
4
6
5
IN  
SENSE  
SD  
GND  
Optional  
NTC  
Thermistor  
U1  
iW1691  
Figure 3.1 : Typical Application Circuit  
Rev. 2.0  
iW1691  
FebRuaRy 3, 2012  
Page 1  
1234567...24

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