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| 型号： | CAT4101TV-T75 |
| 厂商： | ON Semiconductor |
| 文件页数： | 8/9页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR HP CONST CURR D2PAK |
| 特色产品： | 1 Amp Constant-Current, Low Dropout Driver (LDD?) |
| 标准包装： | 1 |
| 恒定电流： | 是 |
| 拓扑： | PWM |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 车载，通用 |
| 类型 - 次要： | 高亮度 LED（HBLED），白色 LED |
| 电源电压： | 3 V ~ 5.5 V |
| 输出电压： | 25V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-263-6，D²Pak（5 引线+接片），TO-263BA |
| 供应商设备封装： | TO-263-5 |
| 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： | CAT4101TV-T75DKR |
CAT4101
Application Information
Single 12 V Supply
The circuit shown in Figure 16 shows how to power three
LEDs in series from a single 12 V supply using the
CAT4101. The CAT4101 can not be driven directly from
12 V, three components are needed to create a lower voltage
for the VIN pin (below 5.5 V). Resistor R2 and zener diode
D provide a regulated voltage while the quiescent current
runs through the N ? Channel transistor M. Suitable parts for
this circuit are the ON Semiconductor MM3Z6V2 zener
diode and the 2N7002L N ? channel transistor (SOT23
package).
For a given package style and board layout, the operating
junction temperature T J is a function of the power
dissipation P D , and the ambient temperature, resulting in the
following equation:
T J + T AMB ) P D ( q JC ) q CA ) + T AMB ) P D q JA
The CAT4101 TO ? 263 5 ? lead package provides a thermal
resistance when the ground tab is soldered down to the PCB.
When mounted on a double ? sided printed circuit board with
two square inches of copper allocated for “heat spreading”,
the resulting q JA is about 30 ° C/W.
For example, at 60 ° C ambient temperature, the maximum
power dissipation is calculated as follow:
+ 150 * 60 + 3 W
P Dmax +
12 V
C2
1 m F
R2
5 k W
D
6.2 V
C1
0.1 m F
M
VIN LED
CAT4101
T Jmax * T AMB
q JA 30
Recommended Layout
The board layout should provide good thermal dissipation
through the PCB. Multiple via can be used to connect the tab
of the CAT4101 to a large ground plane underneath the
EN/PWM
package.
Input capacitor C1 should be placed as close to the driver
R1
RSET
GND
IC as possible. The RSET resistor should have a Kelvin
connection to the GND pin of the CAT4101.
Figure 16. Single Supply Driving Three LEDs
Power Dissipation
The power dissipation (P D ) of the CAT4101 can be
calculated as follows:
P D + (V IN
I IN ) ) (V LED
I LED )
where V LED is the voltage at the LED pin. Combinations of
high V LED voltage or high ambient temperature can cause
the CAT4101 to enter thermal shutdown. In applications
where V LED is high, a resistor can be inserted in series with
the LED string to lower P D .
Thermal dissipation of the junction heat consists
primarily of two paths in series. The first path is the junction
to the case ( q JC ) thermal resistance which is defined by the
package style, and the second path is the case to ambient
( q CA ) thermal resistance, which is dependent on board
layout. The overall junction to ambient ( q JA ) thermal
resistance is equal to:
q JA + q JC ) q CA
Figure 17. CAT4101 Recommended Layout
http://onsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CAT4101TV-T75 | 制造商:ON Semiconductor 功能描述:IC LED DRIVER CONSTANT CURRENT TO263- 制造商:ON Semiconductor 功能描述:IC, LED DRIVER, CONSTANT CURRENT, TO263- |
| CAT4101TV-T75-CUT TAPE | 制造商:ON 功能描述:CAT4101 Series 1 A 5.5 V 5 kHz PWM Dimming Constant Current LED Driver TO-263-5 |
| CAT4103 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:3-Channel Constant-Current RGB LED Driver |
| CAT4103AEVB | 功能描述:BOARD EVALUATION DPP CAT4103A 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 |
| CAT4103AGEVB | 功能描述:CAT4103 3, Non-Isolated Output LED Driver Evaluation Board 制造商:on semiconductor 系列:- 零件状态:有效 电流 - 输出/通道:175mA 输出和类型:3，非隔离 电压 - 输出:- 特性:- 电压 - 输入:3 V ~ 5.5 V 所含物品:板 使用的 IC/零件:CAT4103 标准包装:1 |
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