基于34063自制车载手机充电板

基于34063自制车载手机充电板 由于自家车内有空气净化、电子狗等设备，一个点烟器插口显然不够用，恰巧买车险送了一个一分三的点烟器。这个点烟器自带一个USB接口，号称输出是5V/500mA，私心想着正好给手机充电，真是不错。可是实际使用后发现，我的手机怎么也充不上电,～ 利用周末闲暇时间把这个一分三点烟器拆开一看，难怪了，他的USB输出这部分电路板只用了一个TO-92封装的78L05的稳压器和一个输入端100uF的滤波电容～78L05标称输出才100mA～ 无语了。 cadre education and training system, extensive village (community) training cadres, party members of using distance education site to enhance the attractiveness and effectiveness of education and training. 5 years development members 32. New development of party members in senior high school or above 70 per cent respectively above, members overall quality improved significantly. Third, strengthening village-level party organization of cultivating reserve cadres, each village each year to determine the 1-2 focus on training the young reserve cadres at the village level. Four is in village level affairs management aspects, sound and perfect has village two Board Joint system and village works public democratic decision system; further specification has village level financial management, 16 a village, and community all implemented village fiscal town tube; established and 于是自己动手把稳压器换成了全塑封T0-220封装的KIA 7805A，号称有1.6A的输出电流，又增加了输入输出滤波电容。 使用检测发现，当手机充电电流达到300mA时，7805的片子已 经严重发热，非常烫手了～可是原有电路板又没有放散热片的地方～ 况且即使放上散热片，在密闭的空间里散热效果恐怕也不会好到哪里 cadre education and training system, extensive village (community) training cadres, party members of using distance education site to enhance the attractiveness and effectiveness of education and training. 5 years development members 32. New development of party members in senior high school or above 70 per cent respectively above, members overall quality improved significantly. Third, strengthening village-level party organization of cultivating reserve cadres, each village each year to determine the 1-2 focus on training the young reserve cadres at the village level. Four is in village level affairs management aspects, sound and perfect has village two Board Joint system and village works public democratic decision system; further specification has village level financial management, 16 a village, and community all implemented village fiscal town tube; established and 去。这个U口真成了鸡肋。 后来考虑这个充电USB口还真需要，开车时随时随地就可以给手机充电，非常方便。正好手里有DIP8封装的34063，最终决定使用它重新设计制作一个充电电路板。虽然34063这个片子有效率不高，占空比范围偏小等缺点，但是对于我来说应该够用了。(要求高的可以考虑使用MP1591/LM2576 / LSP5503/CX8505等) 首先参考data sheet，自己设计增加了指示灯和高频输出滤波电容，制作出电路原理图。 以下这是布好线的PCB cadre education and training system, extensive village (community) training cadres, party members of using distance education site to enhance the attractiveness and effectiveness of education and training. 5 years development members 32. New development of party members in senior high school or above 70 per cent respectively above, members overall quality improved significantly. Third, strengthening village-level party organization of cultivating reserve cadres, each village each year to determine the 1-2 focus on training the young reserve cadres at the village level. Four is in village level affairs management aspects, sound and perfect has village two Board Joint system and village works public democratic decision system; further specification has village level financial management, 16 a village, and community all implemented village fiscal town tube; established and 这是Overlay(还有Multilayer) 来张合影 以下是腐蚀出来的电路板(长约40mm，宽约26mm) cadre education and training system, extensive village (community) training cadres, party members of using distance education site to enhance the attractiveness and effectiveness of education and training. 5 years development members 32. New development of party members in senior high school or above 70 per cent respectively above, members overall quality improved significantly. Third, strengthening village-level party organization of cultivating reserve cadres, each village each year to determine the 1-2 focus on training the young reserve cadres at the village level. Four is in village level affairs management aspects, sound and perfect has village two Board Joint system and village works public democratic decision system; further specification has village level financial management, 16 a village, and community all implemented village fiscal town tube; established and 热转印的丝印层 阻焊层 cadre education and training system, extensive village (community) training cadres, party members of using distance education site to enhance the attractiveness and effectiveness of education and training. 5 years development members 32. New development of party members in senior high school or above 70 per cent respectively above, members overall quality improved significantly. Third, strengthening village-level party organization of cultivating reserve cadres, each village each year to determine the 1-2 focus on training the young reserve cadres at the village level. Four is in village level affairs management aspects, sound and perfect has village two Board Joint system and village works public democratic decision system; further specification has village level financial management, 16 a village, and community all implemented village fiscal town tube; established and 制作成品 实际使用检测，充电电流高的时候可以达到500多mA(见下图)， 一般情况下输入电流400mA左右，充电电流300mA左右。但是发现 芯片仍然有发热现象。不过不影响使用。可能是我使用的不是原装的 芯片，性能还是打了折扣。有机会试试原装芯片。 cadre education and training system, extensive village (community) training cadres, party members of using distance education site to enhance the attractiveness and effectiveness of education and training. 5 years development members 32. New development of party members in senior high school or above 70 per cent respectively above, members overall quality improved significantly. Third, strengthening village-level party organization of cultivating reserve cadres, each village each year to determine the 1-2 focus on training the young reserve cadres at the village level. Four is in village level affairs management aspects, sound and perfect has village two Board Joint system and village works public democratic decision system; further specification has village level financial management, 16 a village, and community all implemented village fiscal town tube; established and 总之，基于34063制作车充是一个廉价的，基本满足使用要 求，但是确实存在效率较低，芯片发热(不知道是不是芯片质量的原 因)的现象。个人认为可以考虑把限流电阻Rsc改为0.5欧的，芯片 使用原装芯片或者加个小散热片。 cadre education and training system, extensive village (community) training cadres, party members of using distance education site to enhance the attractiveness and effectiveness of education and training. 5 years development members 32. New development of party members in senior high school or above 70 per cent respectively above, members overall quality improved significantly. Third, strengthening village-level party organization of cultivating reserve cadres, each village each year to determine the 1-2 focus on training the young reserve cadres at the village level. Four is in village level affairs management aspects, sound and perfect has village two Board Joint system and village works public democratic decision system; further specification has village level financial management, 16 a village, and community all implemented village fiscal town tube; established and