资料下载
×
CAT3224 pdf datasheet (4 Amp S
消耗积分:3 |
格式:rar |
大小:256 |
2009-01-19
张敏
分享资料个
The CAT3224 is a very high-current integrated flash LED driver which also supports the charging function for a dual-cell supercapacitor applications. Ideal for Li-ion battery-powered systems, it delivers up to 4A LED flash pulses, far beyond the peak current capability of the battery.
Dual-mode 1x/2x charge pump charges the stacked supercapacitor to a nominal voltage of 5.4V, while an active balance control circuit ensures that both capacitor cell voltages remain matched. The nominal charging current to be drawn from the battery is set by an external resistor tied to the RC pin.
The driver also features two matched current sources. External resistors provide the adjustment for the maximum flash mode current (up to 4A) and the torch mode current (up to 400mA). A built-in safety timer automatically terminates the flash pulse beyond a maximum duration of 300ms.
In addition to thermal shutdown and overvoltage protection, the device is fully protected against external resistor programming faults and fully supports reverse output voltage for all conditions.
The device is packaged in the tiny 16-pad TQFN 3mm x 3mm package with a max height of 0.8mm.
Dual-mode 1x/2x charge pump charges the stacked supercapacitor to a nominal voltage of 5.4V, while an active balance control circuit ensures that both capacitor cell voltages remain matched. The nominal charging current to be drawn from the battery is set by an external resistor tied to the RC pin.
The driver also features two matched current sources. External resistors provide the adjustment for the maximum flash mode current (up to 4A) and the torch mode current (up to 400mA). A built-in safety timer automatically terminates the flash pulse beyond a maximum duration of 300ms.
In addition to thermal shutdown and overvoltage protection, the device is fully protected against external resistor programming faults and fully supports reverse output voltage for all conditions.
The device is packaged in the tiny 16-pad TQFN 3mm x 3mm package with a max height of 0.8mm.
声明：本文内容及配图由入驻作者撰写或者入驻合作网站授权转载。文章观点仅代表作者本人，不代表电子发烧友网立场。文章及其配图仅供工程师学习之用，如有内容侵权或者其他违规问题，请联系本站处理。 举报投诉
评论(0)
发评论
- 相关下载
- 相关文章
