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CII another blow for media ahead of national polls: B’desh Journalist Leaders_我的网站

A |     Dhaka, Oct 11 (UNI) Bangladesh Federal Union of Journalists (BFUJ) and Dhaka Union of Journalists (DUJ) have raised questions over the issuance of a gazette notification declaring 29 government agencies and institutions as 'critical information infrastructure'.
The organisations have termed the gazette notification as an ulterior motive of the government and a new weapon to muzzle the freedom of media.
They also said this is another attack on the news media ahead of the next parliamentary election and demanded immediate cancellation of the gazette notification.
BFUJ president M Abdullah and secretary general Nurul Amin Rokon and DUJ president Kader Gani Chowdhury and general secretary Shahidul Islam made these remarks in a joint statement.
Journalist leaders said this gazette notification announcing critical information infrastructure is deceptive showing excuse of section 15 of Digital Security Act. The journalist community has rejected it.
They also said the government move will prevent independent journalism. This gazette notification is conflicting with the Right to Information Act.
If the list is scrutinised, it would be clear that the government has dishonesty and ill-motive behind the step.
Sensational and important agencies such as the national parliament, the judiciary, the audit department, the defence and home ministries are not included in the list.
The national election is schedule to be held the next year.

Among 29 agencies and institutions, there are names of banks and financial institutions and different organisations related to the elections.
There are names of agencies and institutions which are directly and indirectly related to the elections.
The journalist leaders alleged this gazette notification has been issued so that the journalists cannot collect or publish news related to this.
In the statement journalist leaders demanded the cancellation of all black laws including the Digital Security Act. They also made a demand to halt the initiative to amend the Press Council Act keeping a provision of monetary penalty for journalists.
As per section 15 of Digital Security Act, the post, telecommunication and information technology division issued a gazette notification on 21 September announcing 29 agencies and institutions as critical information infrastructure. The ICT division uploaded the gazette notification on its website on 26 September.
Information infrastructure is a computer system or network of some institutions or agencies, where information is stored. If anyone enters the critical information infrastructure, he or she will be sentenced to seven years or will be fined maximum Tk 2.5 million or the both.
If anyone illegally enters and damage or try to damage, he or she will be sentenced to 14 years or maximum Tk 10 million fined or the both.
ICT division said this information infrastructure will not be an obstacle for the people in gathering information.
Following the issuance of the gazette notification, different political parties and organisations protested against it.
Transparency International Bangladesh (TIB) has termed the list questionable, confusing and inconsiderate. The organisation apprehends the misuse of the act.
UNI MAZ GNK。    充电器支持PD2.0快充，具备5V，12V，15V电压档位，同时自带有电源输入线和USB-C输出线，方便用户使用。产品已经通过了多个国家或地区的认证，全球各个地区都能使用，可见惠普笔记本电脑在全世界都是相当受欢迎的。下面我们就对这款充电器进行拆解，看看其做工用料如何。

B | 惠普45W电源适配器外观惠普这款45W电源适配器自带输入电源线以及USB-C输出线缆，不可分离设计，连接处做了抗弯折保护处理。
电源线采用三脚插头，来自Longwell良维，规格为10A 250V~，通过了CCC认证。

C |
适配器机身方块扁平造型，采用PC阻燃材质黑色外壳，表面磨砂抗指纹。
机身顶面中心设计有HP品牌logo，右侧贴有Windows标签。

D |
机身一侧印有适配器参数型号：TPN-CA02输入：100-240V~50/60Hz 1.4A输出：5V2A、12V3A、15V3A适配器已经通过了KC认证，由群光电能制造。
机身另一侧还有适配器其它认证信息，通过了GS、CE、EAC、CCC、PSE、UL、NOM、NYCE等多个认证，全球绝大多数国家和地区都能使用。
机身与线缆连接处做了抗弯折保护。
USB-C端子采用弯头设计，方便在狭窄角落使用，线头扁平外壳上设计有HP品牌。

E |
测得电源线长度约为49cm。
测得机身长度为66.26mm。
宽度为66.33mm。
厚度为28.9mm。
测得USB-C输出线缆长度约为1.8米，可见适配器整体相当长，满足绝大多场景使用需求。

F |
适配器机身放在手上的大小直观感受。
最后测得适配器总重量约为272g。
使用ChargerLAB POWER-Z KM002C测得适配器支持PD2.0、Samsung 5V2A充电协议。
并且具备5V3A、12V3A、15V3A三组固定电压档位。惠普45W电源适配器拆解对惠普这款45W电源适配器外观和输出进行了解后，下面就进行拆解，看看内部的用料和做工。
沿外壳接缝拆开充电器外壳，内部PCBA模块采用黑色麦拉片绝缘，采用铝制散热片散热。
在拆解中发现电源线采用梅花插头连接。
适配器交流输入采用导线焊接连接。

G |
输出端导线也采用焊接连接。导线冷压端子焊接，并外套热缩管绝缘。
PCBA模块正反面均包裹麦拉片绝缘。
使用游标卡尺测得PCBA模块长度约为60.38mm。
PCBA模块宽度约为60.69mm。
PCBA模块厚度约为23.97mm。

H |
散热片通过焊接固定在PCB背面。
取下PCBA外层的散热片，内部元件打胶固定及散热。
其中共模电感，安规X2电容，变压器，初级电解电容等元件均打胶固定。
PCB背面打胶填充，并粘贴黑色胶块支撑。
其中整流桥和初级开关管共用一块T型散热片，开关管通过螺丝固定在散热片上。
PCBA模块正面一览，右上角为保险丝和输入EMI滤波电路，左侧为高压滤波电容，中间位置为整流桥和开关管，右侧为变压器，在右下角为输出滤波电容。

I |
PCBA模块背面一览，左侧焊接输出协议芯片和VBUS开关管，同步整流控制器，左侧焊接反馈光耦。

J | 通过对PCBA模块的观察，惠普这款45W电源适配器采用反激开关电源架构，同步整流，宽电压输出。输出电压由协议芯片通过光耦进行控制，实现宽电压输出。

K | 下面我们就从输入端开始了解各个器件。
输入端延时保险丝规格为2.5A 250V。

L |
第一级共模电感采用漆包线和绝缘线绕制。
安规X2电容来自SCC实全电子，规格为0.33μF。
第二级共模电感采用漆包线绕制，打胶固定绝缘板。

M |
整流桥型号KBP206GL，规格为2A 600V。
高压滤波电容来自金山，规格为68μF 400V。

N |
初级主控芯片丝印PCL，采用SOT23-6封装。
初级开关管来自东芝，型号2SK3569，是一颗耐压600V的NMOS，导阻为540mΩ。
一颗4.7μF50V电解电容用于主控芯片供电。
变压器采用胶带严密缠绕绝缘，标签印有CHICONY群光字样。
蓝色Y电容特写。
EL1018光耦用于输出电压调节与反馈。
同步整流控制器来自MPS，型号MP6901，是一颗快速关断智能同步整流控制器，支持最高400KHz开关频率，支持CCM，DCM，和准谐振拓扑，支持高侧和低侧应用。
同步整流管来自AOS万代，型号AON6450，是一颗耐压100V的NMOS，导阻12.1mΩ，采用DFN5*6封装。
输出滤波电容规格为680μF 25V。

o |
协议芯片采用伟诠WT6630P，支持USB PD 2.0快充协议，内置5V、12V、15V、20V的VBUS，可设置为30W，45瓦，60W三种输出模式。该芯片支持节电模式、过压保护、低压侧输出电流分流监控器。
输出VBUS开关管采用万代AO4447A，PMOS，耐压30V，SOIC-8封装。
全部拆解完毕，来张全家福。充电头网拆解总结惠普这款45W电源适配器采用输入线和输出线一体设计，三插电源线长度为50CM，输出线长度为180CM，自带接地线的设计能够提供有效的接地，避免使用时的触电感觉。

p | 适配器支持PD2.0快充，具备5V，12V，15V三档输出电压。充电头网通过拆解了解到，惠普这款电源适配器内部PCBA模块包裹散热片，内部整流桥和MOS管固定散热片并打胶加强散热。内部高压开关管来自东芝，同步整流控制器来自MPS，同步整流管和VBUS开关管来自AOS，协议芯片来自伟诠，高压滤波电容来自金山，低压滤波电容来自辉城，大面积的散热设计，满足笔记本电脑长时间满载需求。

q |

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