CXLE8949 CXLE8950是一种用于驱动外部NMOSFET的控制器，通过去除LED-VC和GND之间的电容器消除AC/DC电源上100/120Hz的LED电流纹波，CXLE8949CXLE8950的自适应技术保证了电流纹波。
CXLE8949 CXLE8950将车辆识别码引脚上的输入电压钳制30V，当交直流电源输出电压大于31V时，只需要一个电阻。
CXLE8949 CXLE8950允许用户通过NMOSFET电源和接地之间的感应电阻设置最大LED电流，从而在LED短接或热插拔时保护NMOSFET不受损坏。通过在漏极和VLMT管脚之间的电阻感应NMOSFET的漏极电压，
CXLE8949 CXLE8950允许用户设置LED串的最大阴极电压，这有助于限制芯片上的功耗，当LED的阴极电压高于短路连接阈值时，认为LED短路，当LED短路时保持在60us以上，CXLE8949 CXLE8950关闭NMOSFET，13ms后恢复。
CXLE8949 CXLE8950提供过热保护。当CXLE8950温度超过135时，触发OTP。CXLE8949 CXLE8950关闭NMOSFET，直到温度降至110
用于输入电压钳位的内置齐纳二极管
VG输出电压高达10V
参数如有更改，恕不另行通知
LED电流纹波的可编程幅度
LED可编程最大阴极电压
可编程最大LED电流短路保护
过温保护
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CXLE8949 CXLE8950 is a controller for driving external NMOSFET to remove the 100/120Hz LED current
ripple on AC/DC power by a capacitor between removing LED VC and GND.The adaptive technology of CXLE8950 ensures current ripple.
CXLE8949 CXLE8950 clamps the input voltage on VIN pin by 30V. Only one resistor is needed when the output voltage of AC/DC power is higher than 31V.
CXLE8949 CXLE8950 allows user to setup maximum LED current by the sensing resistor between the
source of NMOSFET and ground, which protects NMOSFET from being damaged when LED short
connected or hot-plug.By sensing the drain voltage of NMOSFET via a resistor between the drain and VLMT pin,
CXLE8949 CXLE8950 allows user to setup the maximum cathode voltage of LED string, which could help
limit the power dissipation on chip.It is considered that LED is shorted when the cathode voltage of LED is
higher than short connecting threshold and remains over 60us CXLE8950 shuts down NMOSFET when
LED is shorted and recovers after 13ms.
CXLE8949 CXLE8950 provides over thermal protection. When the temperature of CXLE8950 exceed 135 , OTP is trigged. CXLE8950 shuts down NMOSFET until the temperature decrease to 110
Built-in zener diode for input voltage clamping
VG output voltage high to 10V
Parameters Subject to Change Without Notice
Programmable amplitude of LED current ripple
Programmable maximum cathode voltage of LED
Programmable maximum LED current Short protection
Over temperature protection
SOT23-6 Package
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工频纹波滤除产品 |
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产品型号 |
描述 |
LED 电压 |
最大输出电流(A) |
功率管 |
封装 |
OCP,OVP,和OTP |
|
自适应100/120Hz 电流纹波消除IC |
4.5 - 60 |
0.35 |
内置 |
ESOP8 TO220-5 |
Latch-off |
|
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自适应100/120Hz 电流纹波消除IC(适用于Triac 调光) |
5 - 60 |
0.6 |
内置 |
ESOP8 |
Hiccup |
|
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自适应100/120Hz 电流纹波消除IC |
10 - 60 |
1 |
内置 |
TO252-5 |
Hiccup |
|
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自适应100/120Hz 电流纹波消除IC |
10 - 60 |
0.5 |
内置 |
ESOP8 |
Hiccup |
|
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集成高压MOS的自适应100/120Hz电流纹波消除IC |
12-130 |
0.5 |
内置 |
ESOP8 |
Hiccup |
|
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自适应100/120Hz 电流纹波消除控制器 |
Up to 200V |
Up to 5A |
外置 |
SOT23-6 |
Hiccup |
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◀ 上一篇:CXLE8948驱动LED串自适应100/120Hz电流纹波消除器可编程LED电流纹波阴极电压LED管脚上的电压超过6V则电流纹波消除功能将被禁用电流内部限制在0.7A
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