拆解天猫精灵AI联盟之得邦照明

末蓝、 2022-03-12 02:58 544阅读 0赞

双十一期间，[天猫精灵][Link 1]方糖套装89（20定金+69尾款），69是用红包付款的，相当于花了20，还是很超值的。套装中包括天猫精灵方糖+得邦智能[LED][]\+智能插座。

LED灯罩是卡扣加胶粘合的，稍微加热一下比较好拆，也基本无损。

[![5c1af593e9e03-thumb.png][]][5c1af593e9e03-thumb.png 1]

[![5c1af599a1290-thumb.png][]][5c1af599a1290-thumb.png 1]

5W 的功率

[![5c1af59a2d93b-thumb.png][]][5c1af59a2d93b-thumb.png 1]

好了，取下了灯罩

[![5c1af59a4a78c-thumb.png][]][5c1af59a4a78c-thumb.png 1]

可以看到是15颗暖色LED，16颗冷色LED，色温无极调节就是分别控制暖色和冷色LED工作的。

[![5c1af59a858d9-thumb.png][]][5c1af59a858d9-thumb.png 1]

驱动IC为SM2123E，是一款通过[PWM][]控制调节亮度或者色温的LED恒流驱动芯片。

[![5c1af59b1791d-thumb.png][]][5c1af59b1791d-thumb.png 1]

典型电路如图

[![5c1af59c8ea03-thumb.jpg][]][5c1af59c8ea03-thumb.jpg 1]

计算公式如下图

[![5c1af5ef925d1-thumb.jpg][]][5c1af5ef925d1-thumb.jpg 1]

接着拆，把胶扣一扣后，取下LED灯板

[![5c1af5a9d5d5a-thumb.png][]][5c1af5a9d5d5a-thumb.png 1]

铝基板采用接插座连接，4pin 的接插座

[![5c1af5a727f0e-thumb.png][]][5c1af5a727f0e-thumb.png 1]

把主要电路也取下，这一步我动了烙铁所以也是无损的。灯壳内部有铝壳附着，用于散热。

[![5c1af5a807a31-thumb.png][]][5c1af5a807a31-thumb.png 1]

灯尾部位有一个保险丝串进电路。

[![5c1af5a7b3cd2-thumb.png][]][5c1af5a7b3cd2-thumb.png 1]

整个电路是这个样子的，两块板子是通过接插件连接的。

[![5c1af5ad2e722-thumb.png][]][5c1af5ad2e722-thumb.png 1]

泰凌微电子的TSLR8269无线IoT芯片板是竖着插在电路板上的

[![5c1af667d5126-thumb.png][]][5c1af667d5126-thumb.png 1]

背部有测试点，无线IoT芯片板是3.3V供电

[![5c1af5ad6639d-thumb.png][]][5c1af5ad6639d-thumb.png 1]

电源部分的电容和电感，具体参数见文末的原理图。

[![5c1af66b03ef5-thumb.png][]][5c1af66b03ef5-thumb.png 1]

电源板部分

[![5c1af66af103f-thumb.png][]][5c1af66af103f-thumb.png 1]

上海贝岭BL9153 40V/0.5A高压LDO，用于产生3.3V给无线部分供电。

[![5c1af5aa915ce-thumb.png][]][5c1af5aa915ce-thumb.png 1]

LDO前级的是晶丰明源的BP8519C，是一款700V的非隔离降压型恒压芯片。

[![5c1af5ab63b85-thumb.png][]][5c1af5ab63b85-thumb.png 1]

产生的电压大约为1.63\*（43K+16K）/16K-Vdiode=6V-Vdiode

[![5c1af5ac82baf-thumb.jpg][]][5c1af5ac82baf-thumb.jpg 1]

实测大约为4.88V

[![5c1af6b769f86-thumb.jpg][]][5c1af6b769f86-thumb.jpg 1]

二极管ES1J

[![5c1af5b298aaf-thumb.png][]][5c1af5b298aaf-thumb.png 1]

看一下TSLR8269无线IoT芯片板的连接，只有5个点，分别是两个地，一个3.3V电源，一个暖色光的PW3，冷色光的PW2。

[![5c1af5b1aa275-thumb.jpg][]][5c1af5b1aa275-thumb.jpg 1]

原理图如下图。

[![5c1af5b531d2b-thumb.jpg][]][5c1af5b531d2b-thumb.jpg 1]

这个LED还有点特殊，单颗的VF值相当高。

**实测：**

暖光LED工作电压238V左右，238/15串=15.86V

冷光LED工作电压246V左右，246/16串=15.37V

单颗LED的VF都在15V以上。。。

[Link 1]: https://engine.eefocus.com/article/tag/%E5%A4%A9%E7%8C%AB%E7%B2%BE%E7%81%B5
[LED]: https://engine.eefocus.com/article/tag/LED
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