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參數(shù)資料
| 型號(hào)： | CAT4238TD-GT3 |
| 英文描述： | High Efficiency 10 LED Boost Converter |
| 中文描述： | 高效率的LED升壓轉(zhuǎn)換器10 |
| 文件頁數(shù)： | 9/14頁 |
| 文件大?。?/td> | 290K |
| 代理商： | CAT4238TD-GT3 |
CAT4238
2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
9
Doc. No. 5019 Rev. A
OPEN LED PROTECTION
In the event of an “Open LED” fault condition, the
CAT4238 will continue to boost the output voltage with
maximum power until the output voltage reaches
approximately 40V. 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 6mW (about 1.6mA
input current 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 Protection without Zener
L
Open LED Switching Waveforms
without Zener
Open LED Supply Current vs. VIN
without Zener
0.0
1.0
2.0
3.0
4.0
5.0
3.0
3.5
INPUT VOLTAGE [V]
4.0
4.5
5.0
5.5
S
Open LED Output Voltage vs. VIN
without Zener
35
40
45
50
55
3.0
3.5
INPUT VOLTAGE [V]
4.0
4.5
5.0
5.5
O
VIN
CAT4238
VIN
Schottky 100V
(Central CMSH1-100)
V
OUT
R1
15
V
FB
= 300mV
4.7μF
C1
0.22μF
C2
FB
SHDN
SW
GND
OFF ON
47μH
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CAT4238TD-GT3 | 制造商:ON Semiconductor 功能描述:IC LED DRIVER BOOST TSOT-23-5 制造商:ON Semiconductor 功能描述:IC, LED DRIVER, BOOST, TSOT-23-5 |
| CAT4238TDI-G | 制造商:ON Semiconductor 功能描述:IC 10-LED DRIVER LOW NOISE BOOST |
| CAT4240 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:6 Watt Boost LED Driver |
| CAT4240_0711 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:6 Watt Boost LED Driver |
| CAT4240AEVB | 功能描述:BOARD EVALUATION DPP CAT4240A RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估板 - LED 驅(qū)動(dòng)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(diǎn):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 |
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