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參數(shù)資料
| 型號(hào)： | CAT4240 |
| 元件分類(lèi)： | LED驅(qū)動(dòng)器 |
| 英文描述： | 6 Watt Boost LED Driver |
| 中文描述： | 6瓦升壓LED驅(qū)動(dòng)器 |
| 文件頁(yè)數(shù)： | 8/14頁(yè) |
| 文件大?。?/td> | 319K |
| 代理商： | CAT4240 |
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CAT4240
Doc. No. MD-5026 Rev. B
8
Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
APPLICATION INFORMATION
External Component Selection
Capacitors
The CAT4240 only requires small ceramic capacitors
of 4.7
μ
F on the inductor input, 1μF on the VIN pin and
1μF on the output. Under normal condition, a 4.7μF
input capacitor is sufficient. For applications with
higher output power, a larger input capacitor of 10μF
may be appropriate. X5R and X7R capacitor types are
ideal due to their stability across temperature range.
Inductor
A 47μH inductor is recommended for most of the
CAT4240 applications. In cases where the efficiency
is critical, inductances with lower series resistance are
preferred. Inductors with current rating of 800mA or
higher are recommended for most applications.
Sumida CDRH6D28-470 47μH inductor has a rated
current of 800mA and a series resistance (D.C.R.) of
176m
typical.
Schottky Diode
The current rating of the Schottky diode must exceed
the peak current flowing through it. The Schottky
diode performance is rated in terms of its forward
voltage at a given current. In order to achieve the best
efficiency, this forward voltage should be as low as
possible. The response time is also critical since the
driver is operating at 1MHz. Central Semiconductor
Schottky
rectifier
CMSH1-40
recommended for most applications.
(1A
rated)
is
LED Current Setting
The LED current is set by the external resistor R1
connected between the feedback pin (FB) and
ground. The formula below gives the relationship
between the resistor and the current:
R1 = 0.3V/LED current
LED current (mA)
20
25
30
100
300
R1 (
)
15
12
10
3
1
Table 1. Resistor R1 and LED current
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CAT4240_0711 | 制造商:CATALYST 制造商全稱(chēng):Catalyst Semiconductor 功能描述:6 Watt Boost LED Driver |
| CAT4240AEVB | 功能描述:BOARD EVALUATION DPP CAT4240A RoHS:是 類(lèi)別:編程器，開(kāi)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(lèi)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 |
| CAT4240AGEVB | 制造商:ON Semiconductor 功能描述:EVAL BD FOR LED DRIVER - Bulk 制造商:ON Semiconductor 功能描述:BOARD EVAL FOR CAT4240 |
| CAT4240TD-GT3 | 功能描述:LED照明驅(qū)動(dòng)器 High Voltage Boost 2 Watt RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| CAT4240TD-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 |
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