- 您现在的位置：买卖IC网 > Datasheet目录318 > CAT4238TD-GT3 (ON Semiconductor)IC LED DRVR WHITE BCKLGHT TSOT-5 Datasheet资料下载
参数资料
| 型号： | CAT4238TD-GT3 |
| 厂商： | ON Semiconductor |
| 文件页数： | 7/12页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGHT TSOT-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： | 38V |
| 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： | CAT4238TD-GT3DKR |
CAT4238
TYPICAL CHARACTERISTICS
(V IN = 3.6 V, C IN = 4.7 m F, C OUT = 0.22 m F, L = 47 m H with 10 LEDs at 20 mA, T AMB = 25 ° C, unless otherwise specified.)
60
1.0
50
40
30
20
10
VOUT = 35 V
0.8
0.6
0.4
? 40 ° C
? 25 ° C
85 ° C
125 ° C
0
3.0
3.5
4.0
4.5
5.0
5.5
0.2
3.0
3.5
4.0
4.5
5.0
R 1 +
current
INPUT VOLTAGE (V)
Figure 16. Maximum Output Current vs. Input
Voltage
Application Information
External Component Selection
Capacitors
The CAT4238 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 47 m H inductor is recommended for most of the
CAT4238 applications. In cases where the efficiency is
INPUT VOLTAGE (V)
Figure 17. Shutdown Voltage vs. Input Voltage
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
CDC5D23B ? 470 47 m H inductor has a rated current of
490 mA and a series resistance (D.C.R.) of 420 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
7
相关PDF资料 |
PDF描述 |
|---|---|
| CAT4240TD-GT3 | IC LED DRVR WHITE BCKLGHT TSOT-5 |
| CAT93C56XI | IC EEPROM 2KBIT 2MHZ 8SOIC |
| CAT93C66XI | IC EEPROM 4KBIT 2MHZ 8SOIC |
| CAT93C86LI-G | IC EEPROM 16KBIT 3MHZ 8DIP |
| CAT9532WI-T1 | IC LED DRIVER LINEAR 24-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 制造商全称:Catalyst Semiconductor 功能描述:6 Watt Boost LED Driver |
| CAT4240_0711 | 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:6 Watt Boost LED Driver |
| CAT4240AEVB | 功能描述:BOARD EVALUATION DPP CAT4240A RoHS:是 类别:编程器，开发系统 >> 评估板 - LED 驱动器 系列:* 标准包装:1 系列:PowerWise® 电流 - 输出 / 通道:20mA 输出及类型:1，非隔离 输出电压:17V 特点:可调光 输入电压:2.7 ~ 5.5 V 已供物品:板 已用 IC / 零件:LM3508 相关产品: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 |
发布紧急采购，3分钟左右您将得到回复。