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| 型号： | CAT4104V-GT3 |
| 厂商： | ON Semiconductor |
| 文件页数： | 10/13页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR 4CH 175MA 8SOIC |
| 标准包装： | 3,000 |
| 恒定电流： | 是 |
| 拓扑： | PWM |
| 输出数： | 4 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 汽车，背光，通用型 |
| 类型 - 次要： | 高亮度 LED（HBLED） |
| 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： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
| 其它名称： | CAT4104V-GT3-ND CAT4104V-GT3OSTR |
CAT4104
VCC
For a given package style and board layout, the operating
5V
C2
1 m F
RPTC
junction temperature T J is a function of the power
dissipation P D , and the ambient temperature, resulting in the
following equation:
C1
0.1 m F
VIN LED1
CAT4104
LED2
350 mA
T J + T AMB ) P D ( q JC ) q CA ) + T AMB ) P D q JA
When mounted on a double ? sided printed circuit board
with two square inches of copper allocated for “heat
+ 150 * 60 + 1 W
T Jmax * T AMB
P Dmax +
R2
5 k W
R1
1436 W
EN/PWM LED3
RSET LED4
GND
M1
spreading”, the resulting q JA is about 90 ° C/W for the
TDFN ? 8 package, and 160 ° C/W for the SOIC ? 8 package.
For example, at 60 ° C ambient temperature, the maximum
power dissipation for the TDFN ? 8 is calculated as follow:
q JA 90
Recommended Layout
Figure 23. LED Current Derating
Power Dissipation
The power dissipation (P D ) of the CAT4104 can be
calculated as follows:
P D + (V IN I IN ) ) S (V LEDN I LEDN )
where V LEDN is the voltage at the LED pin, and I LEDN is the
LED current. Combinations of high V LEDN voltage and high
ambient temperature can cause the CAT4104 to enter
thermal shutdown. In applications where V LEDN is high, a
resistor can be inserted in series with the LED string to lower
the power dissipation 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:
A small ceramic capacitor should be placed as close as
possible to the driver VIN pin. The RSET resistor should
have a Kelvin connection to the GND pin of the CAT4104.
The board layout should provide good thermal dissipation
through the PCB. In the case of the CAT4104VP2 in the
TDFN package, a via can be used to connect the center tab
to a large ground plane underneath as shown on Figure 24.
Figure 24. CAT4104 Recommended Layout
q JA + q JC ) q CA
http://onsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CAT4104VP2-GT3 | 功能描述:LED照明驱动器 LED Driver 32 LED Series/Parallel 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 |
| CAT4106 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:6 W Quad Channel DC/DC LED Driver with Diagnostics |
| CAT4106AEVB | 功能描述:BOARD EVALUATION DPP CAT4106A 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 |
| CAT4106AGEVB | 制造商:ON Semiconductor 功能描述:EVAL BOARD - Bulk |
| CAT4106HV4-G | 功能描述:LED照明驱动器 6W Quad-Ch DC/DC LED Driver w/Diag. 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 |
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