- 您现在的位置：买卖IC网 > PDF目录21968 > CAT4237TD-GT3 (ON Semiconductor)IC LED DRVR WHT BCKLGHT TSOT23-5 PDF资料下载
参数资料
| 型号： | CAT4237TD-GT3 |
| 厂商： | ON Semiconductor |
| 文件页数： | 8/12页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHT BCKLGHT TSOT23-5 |
| 标准包装： | 1 |
| 恒定电流： | 是 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 800kHz ~ 1.3MHz |
| 电源电压： | 2.8 V ~ 5.5 V |
| 输出电压： | 30V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-5 细型，TSOT-23-5 |
| 供应商设备封装： | TSOT-23-5 |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 产品目录页面： | 805 (CN2011-ZH PDF) |
| 其它名称： | CAT4237TD-GT3DKR |
CAT4237
R 1 +
current
Application Information
External Component Selection
Capacitors
The CAT4237 only requires small ceramic capacitors of
4.7 m F on the input and 0.22 m F on the output. Under normal
condition, a 4.7 m F input capacitor is sufficient. For
applications with higher output power, a larger input
capacitor of 10 m F may be appropriate. X5R and X7R
capacitor types are ideal due to their stability across
temperature range.
Inductor
A 33 m H inductor is recommended for most of the
CAT4237 applications. In cases where the efficiency is
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 1 MHz.
Central Semiconductor Schottky diode CMDSH05 ? 4
(500 mA rated) is recommended for most applications.
LED Current Setting
The LED current is set by the external resistor R 1
connected between the feedback pin (FB) and ground. The
formula below gives the relationship between the resistor
and the current:
0.3 V
LED
Table 5. RESISTOR R 1 AN D LED CURRENT
critical, inductances with lower series resistance are
preferred. Inductors with current rating of 300 mA or higher
are recommended for most applications. Sumida
CDRH3D16 ? 330 33 m H inductor has a rated current of
320 mA and a series resistance (D.C.R.) of 520 m W typical.
Schottky Diode
The current rating of the Schottky diode must exceed the
peak current flowing through it. The Schottky diode
LED Current (mA)
5
10
15
20
25
30
R 1 ( W )
60
30
20
15
12
10
performance is rated in terms of its forward voltage at a
http://onsemi.com
8
相关PDF资料 |
PDF描述 |
|---|---|
| VE-B5R-CV-F3 | CONVERTER MOD DC/DC 7.5V 150W |
| REC3-2405DRW/H2/C | CONV DC/DC 3W 18-36VIN +/-05VOUT |
| VE-B5R-CV-F2 | CONVERTER MOD DC/DC 7.5V 150W |
| PSA60-301 | POWER SUPPLY OPEN FRAME SWITCH |
| MIC4832YML TR | IC EL DRIVER 220VPP LN 8-MLF |
相关代理商/技术参数 |
参数描述 |
|---|---|
| CAT4237TD-GT3 | 制造商:ON Semiconductor 功能描述:IC, WHITE LED DRIVER, BOOST, TSOT-23-5 |
| CAT4237TD-T3 | 功能描述:LED照明驱动器 High Voltage Boost White LED RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| CAT4237TS | 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:High Voltage CMOS Boost White LED Driver |
| CAT4237TS-TE7 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Catalyst Semiconductor 功能描述: |
| CAT4238 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:High Efficiency 10 LED Boost Converter |
发布紧急采购，3分钟左右您将得到回复。