UC2845替换

听说UC2845要停产了，我司大量产品在使用该芯片，TI有无其它芯片可直接替换？请推荐！谢谢！

你好：

UC3842/UC3843/UC3845均可以替代

http://www.ti.com.cn/product/cn/uc3845 

http://www.ti.com.cn/product/cn/uc3843

http://www.ti.com.cn/product/cn/uc3842

您好，

关于一款产品是否会停产，请咨询TI的相关Business Development或者Sales Manager这样的产品负责人，勿信流言蜚语。

关于直接替代的问题，建议使用UC2843，它与UC2845仅仅是Max duty 不同。

UC2843资料可在这里找到： http://www.ti.com.cn/product/cn/uc2843

另外，UC1842/3/4/5

UC2842/3/4/5

UC3842/3/4/5

这系列您都可以考虑。他们的区别在于UVLO、Max Duty、工作温度。具体如下，

1.The UC1842 and UC1844 have UVLO

thresholds of 16 VON and 10 VOFF, ideally suited to

off-line applications. The corresponding thresholds

for the UC1843 and UC1845 are 8.4 V and 7.6 V.

The UC1842 and UC1843 can operate to duty cycles

approaching 100%. A range of zero to 50% is

obtained by the UC1844 and UC1845 by the addition

of an internal toggle flip flop which blanks the output

off every other clock cycle.

2.Unless otherwise stated, these specifications apply for –55°C £ TA£ 125°C for the UC184X; –40°C £ TA£ 85°C for the

UC284X; 0°C £ TA£ 70°C for the 384X;

感谢！已经找到新的代理商能够继续供货。问题暂时解决！