【产品】可用于电池充电器和适配器的恒压恒流控制器芯片DK412T，电压工作范围为3.6-36V
东科半导体推出的恒压恒流控制器芯片DK412T是一款适用于需要双控制环路实现恒压和恒流的开关电源的高集成解决方案。芯片内部集成一个1.2V电压基准，一个100mV低电压基准，一个20mV超低电压基准和三个运放。1.2V电压基准结合一个运放使DK412T产生一个理想电压值用于电源适配器和电池充电器。100mV低电压基准结合另一个运放使DK412T产生一个理想的极限电流为输出限流恒流检测。一个20mV更低电压基准结合一个运放产生一个理想的转灯电路。当电流正常充电时红灯亮，绿灯灭。当充电电流降低到极限电流的20%时，绿灯亮，红灯灭。在检测电池充满电后，为了防止红绿灯回跳，转灯比较器做了25%的迟滞。为了防止电池过充，在转绿灯后，芯片内部开始计时，到达定时2.5小时后，降低恒压基准为1V，输出电压因此降低，延长电池寿命。
图 1 电路结构方框图
产品特点
●恒压恒流控制
●精确内部电压基准
●外围器件少，整机成本低
●易于补偿
●极宽的电压工作范围 3.6-36V
●充电状态指示功能
●电路简单，方便Layout
推荐工作条件
表 1
极限参数
表 2
电特性参数 (除非特别标注，测试环境温度 TA =25℃，VCC=10V)
表 3
注：在短时间内施加器件允许的最大值不会引起产品永久性的损坏，但长时间用在器件允许的最大值时，会对产品的可 靠性造成影响。
应用场合
●电源适配器
●电源充电器
SOP-8 封装外形及尺寸
图 2
订货信息
表 4
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本文由三年不鸣转载自东科半导体，原文标题为:电池充电器和适配器的恒压恒流控制器芯片DK412T，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。
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【选型】东科半导体（DK）AC-DC交直流隔离式副边反馈开关/隔离式原边反馈开关/非隔离开关/同步整流开关芯片和充电器芯片选型指南
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【应用】开关电源控制芯片DK1203用于家用电源适配器，采用高集成度CMOS电路设计，外围元件极少
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应用方案 发布时间 : 2023-03-16
【视频】东科半导体GaN+SR，合封氮化镓，工作频率达150KHz，可广泛应用于消费市场
型号- DK5V45R15ST1,DK212,DK5V60R30,DK5V45R05M,DK218,DK5V45R20M,DK5V100R25M,DK5V45R10ST1,DK5V100R20ST1,DK1203,DK125,DK3703,DK124,DK5V60R20,DK3701,DK3702,DK602,DK5V100R15,DK601,DK5V60R25,DK5V100R10,DK5V100R10M,DK075G,DK5V100R25ST1,DK112,DK5V45R15,DK5V45R10,DK236,DK5V60R10,DK5V85R25,DK910,DK5V100R25,DK912,DK5V60R15,DK5V45R10M,DK5V100R15M,DK036G,DK5V100R20,DK020G,DK5V45R20,DK5V100R05ST1,DK5V100R05M,DK5V45R25,DK224,DK501,DK5V85R15,DK106,DK502,DK5V45R15M,DK903,DK905,DK5V45R05ST1,DK5V100R15ST1,DK906,DK025G,DK045G,DK065G,DK5V100R20M
光耦凭借其独特的电气隔离与抗干扰特性，成为记本电脑电源适配器安全与稳定的基石
在当下这个高速运转的数字时代，笔记本电脑已成为我们日常工作、学习及娱乐不可或缺的重要伴侣。而支撑这些设备持续稳定运行的，正是其背后的电源适配器。对于电源适配器而言，安全性和稳定性至关重要，其中，光耦（光电耦合器）作为其核心组件，发挥着至关重要的作用。
技术探讨 发布时间 : 2024-10-26
【应用】高精度PWM控制电路集成芯片GC2263在电源适配器上的应用
在电源适配器电路中，需要选用一款性能优异的PWM控制芯片。上海国芯生产的GC2263是一款高精度 PWM 控制电路集成芯片，非常适合在电源适配器的电路中使用。
应用方案 发布时间 : 2019-07-25
关于电源适配器CE认证的详细概述
电源适配器CE认证是指电源适配器产品符合欧洲经济区（EEA）市场法规的认证过程，确保产品符合欧洲相关的安全、健康和环保要求，从而在EEA市场上自由流通。本文中全球通检测来与您分享关于电源适配器CE认证的详细概述。
技术探讨 发布时间 : 2024-09-12
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