大电流恒流源方案请教

wangjt · 发表于 2003-12-1 13:52:04

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要求输出电流8A可调
请各路高手不吝赐教，题几个方案大家讨论讨论

wangjt · 发表于 2003-12-2 08:13:16

输出电压大概9－10V，是从整流桥输出的，最后要产生一个8A的恒流源
小电流的恒流源到处都是，大电流的我找了很久好像都没找到
至于负载，我也不是很清楚，因为是化学物质

atuhappy · 发表于 2003-12-2 09:03:22

充电器吗

yangtch · 发表于 2003-12-2 10:50:07

TI上面有！TPS75系列

wangjt · 发表于 2003-12-2 14:02:27

不是充电器，充电器的电流哪有这么大，电流是用来电解的
TPS75系列？没听说过，找找看，先谢过了！

wangjt · 发表于 2003-12-3 08:55:43

大家说话啊
或者给几个方向，拜托了

beach · 发表于 2003-12-5 04:07:14

using switching regulator:
select a current mode PWM controller, let your regulator working in current mode. then you are down. such as UC3842

wangjt · 发表于 2003-12-5 10:46:44

Can the UC3842 output 8 amp current?
I read the datasheet briefly,but I think I'am disappointed.
Give some more details please!
Thanks!

beach · 发表于 2003-12-6 03:04:15

uC3842 is flyback converter controll IC. you need to design a flyback circuit to current source. there is no ready hot for you w/o doing anything.

wangjt · 发表于 2003-12-8 08:08:17

Sorry,I'am so poor to read the last sentence.What does it mean?
Does 'flyback' mean 'feedback'?that's '反馈',right?

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