參數(shù)資料
型號： CAT4237
英文描述： High Voltage CMOS Boost White LED Driver
中文描述： 高電壓的CMOS升壓白光LED驅(qū)動器
文件頁數(shù)： 9/13頁
文件大小： 533K
代理商： CAT4237
CAT4237
2005 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
9 of 13
Doc. No. 5013, Rev. A
OPEN LED PROTECTION
In the event of an “Open LED” fault condition,
the CAT4237 will continue to boost the output
voltage with maximum power until the output
voltage reaches approximately 35V. Once the
output exceeds this level, the internal circuitry
immediately places the device into a very low
power mode where the total input power is
limited to about 4mW (about 1mA input current
Open LED Protection without Zener
with a 3.6V supply). The SW pin clamps at a
voltage below its maximum rating of 60V. There
is no need to use an external zener diode
between Vout and the FB pin. A 50V rated C2
capacitor is required to prevent any overvoltage
damage in the open LED condition.
Open LED Switching waveforms
without Zener
Open LED Supply Current vs. VIN
without Zener
0.0
0.5
1.0
1.5
2.0
2.5
3.0
INPUT VOLTAGE [V]
3.5
4.0
4.5
5.0
S
Open LED Output Voltage vs. VIN
without Zener
30
35
40
45
50
2.5
3.0
INPUT VOLTAGE [V]
3.5
4.0
4.5
5.0
O
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CAT4237_07 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:High Voltage CMOS Boost White LED Driver
CAT4237_08 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:High Voltage CMOS Boost White LED Driver
CAT4237BEVB 功能描述:BOARD EVALUATION DPP CAT4237B RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - LED 驅(qū)動器 系列:* 標(biāo)準(zhǔn)包裝:1 系列:PowerWise® 電流 - 輸出 / 通道:20mA 輸出及類型:1，非隔離 輸出電壓:17V 特點:可調(diào)光 輸入電壓:2.7 ~ 5.5 V 已供物品:板 已用 IC / 零件:LM3508 相關(guān)產(chǎn)品:LM3508TLX-ND - IC LED DRVR WHT BCKLGT 9USMDLM3508TLDKR-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLCT-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLTR-ND - IC LED DRVR WHT BCKLGT 9MICROSMD
CAT4237BGEVB 功能描述:CAT4237 1, Non-Isolated Output LED Driver Evaluation Board 制造商:on semiconductor 系列:- 零件狀態(tài):有效 電流 - 輸出/通道:30mA 輸出和類型:1，非隔離 電壓 - 輸出:30V 特性:可調(diào)光 電壓 - 輸入:2.8 V ~ 5.5 V 所含物品:板 使用的 IC/零件:CAT4237 標(biāo)準(zhǔn)包裝:1
CAT4237TD 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:High Voltage CMOS Boost White LED Driver
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