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2812 问:关于2812电源电压转换的芯片

院士
2006-09-17 18:14:16     打赏
2812 问:关于2812电源电压转换的芯片



关键词: 关于     电源     电压     转换     芯片    


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院士
2006-12-22 22:43:00     打赏
2楼
问 见过3个图
EzDSP,用的TPS767D301,由5V生成3.3V;
        另又用了一片TPS3307,由3.3V生成1.8V;
seedDSP的一块板子里,用TPS767D301,由5V生成3.3V和1.8V;
                       并且直接应用3.3V配套的RESET信号;
wintech的一块板子里,用TP7333Q,由5V生成3.3V;
                      用TP7301Q,由5V生成1.8V;
                      另用个SW产生RESET信号;
不知哪个配置,信号最稳定?
    哪个配置,最省钱? 1: 或者说说其它的配置 2: 楼主有没有EzDSP的原理图啊?能否提供啊?楼主有没有EzDSP的原理图啊?能否提供啊?
kingpooo@yahoo.com.cn 3: 偶用318一片搞定,呵呵 4: 邮件已发请签收 5: 楼主有seed板子的原理图么能提供一下么? 万分感谢

kikimonkey@hit.edu.cn 6: last one已发
签收

7: 就怕芯片太热用318会不会很烫?
318的1.8V和3.3V各有最大为1A的电流输出,
对1.8V,估计输出电流凑合;
但3.3V,既要作模拟电源,岔开后,又要作数字电源,输出电流估计很大了
两个加起来,由一个片子承担,会不会热过头了啊?

用两个芯片的话,
若用301产生1.8V,输出最大500mA,应该凑合
若用333产生3.3V,输出最大却只有500mA,就怕不顶事啊

以上只是揣测,不知诸位咋办的呀
8: 对,芯片有时候会热在我的应用里,318就很热,不过好歹我是做毕设,否则工业设备课不允许没散热片还那么热 9: 多谢楼主! 10: 楼主有能否提供一下你说的三个原理图?  zjz_nyzp1978@sina.com
  不胜感谢!!谢谢了!
  

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