CYT1000A Datasheet PDF - JXY
Part Number | CYT1000A | |
Description | Linear constant current IC | |
Manufacturers | JXY | |
Logo | ![]() |
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CYT1000A高功率因数线性恒流LED芯片
CYT1000A 规格书
特点
概述
输出电流可调 5mA-60mA,
CYT1000A 是一款线性恒流 IC,输出电流可调,
恒流精度可以达到±3%; 恒流精度高,应用方案简单,成本和阻容降压相当,
具有过温保护功能;
具有过温保护功能,更安全,更可靠。
无 EMC 问题;
管脚图
芯片与 PCB 可以共用铝基
板;
线路简单,成本低廉;
封装:ESOP-8;
应用领域
球泡灯
日光灯
筒灯
吸顶灯
管脚
GND1
REXT1
GND2
REXT2
OUT1
OUT2
NC
管脚序号
1
2
3
4
7
5
6、8
功能
芯片 1 地
芯片 1 电流调节端
芯片 2 地
芯片 2 电流调节端
芯片 1 电流输出端
芯片 2 电流输出端
悬空脚
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![]() ![]() CYT1000A高功率因数线性恒流LED芯
电阻 R 不同,流经 LED 的电流就不同,所呈现的 VF 就不一样,进而影响 LED
的整体电压 VF
3、 LED 功耗计算
LED 电流的有效值计算如下:
I LED I F * T / T
LED 电压的有效值如下:
(5)
VLED VF * T / T
LED 的功耗计算如下:
(6)
PLED VLED * I LED I F *VF * (T / T )
(7)
4、 IC 功耗计算
市电的电压和灯珠电压的差是 IC 的工作电压,其表达式如下:
uIC(t ) u(t ) V(t ) 2Usin(2ft ) V(t )
IC 的功耗是对上式进行积分计算,如下:
T2
PIC ( 2Usin(2ft) VF ) * I F dt / T
T1
5、 电源效率计算
(8)
(9)
PLED /(PLED PIC P固有损耗)%
(10)
线路的固有损耗是指 IC 的开关损耗,线路损耗,整流桥的损耗等相关损耗
这些值是无法计算的,但是通过对比实验我们可以得出,该损耗近似是个固定值。
至此,关于 CYT1000A IC 的所有理论计算已经完成,可以将上述公式做成图
形用户界面,以此可以模拟出光电模组在不同的灯珠数量,不同的反馈电阻,不
同的灯珠类型的情况下功率和电源效率的变化,参考<CYT1000A 应用设计表格>。
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for CYT1000A electronic component. |
Information | Total 9 Pages | |
Link URL | [ Copy URL to Clipboard ] | |
Product Image and Detail view | ![]() 1. Current LED Driver - CYT [ Learn More ] | |
Download | [ CYT1000A.PDF Datasheet ] |
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