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参数资料
| 型号： | CAT4109V-GT2 |
| 厂商： | ON Semiconductor |
| 文件页数： | 8/10页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER RGB 16-SOIC |
| 标准包装： | 1 |
| 恒定电流： | 是 |
| 拓扑： | PWM |
| 输出数： | 3 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | RGB |
| 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： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 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： | CAT4109V-GT2DKR |
CAT4109, CAV4109
BLOCK Diagram
LED1 LED2 LED3
VDD
RSET3
1.2 V Ref
Current Setting
RSET2
RSET1
OE
PWM1
PWM2
PWM3
Current Setting
Current Setting
CURRENT
SINKS
GND
PGND
Figure 14. CAT4109/CAV4109 Functional Block Diagram
Basic Operation
The CAT4109/CAV4109 uses 3 independent current sinks
to accurately regulate the current in each LED channel to
400 times the current sink from the corresponding RSET
pin. Each of the resistors tied to the RSET1, RSET2, RSET3
pins set the current respectively in the LED1, LED2, and
LED3 channels. Table 6 shows standard resistor values for
RSET and the corresponding LED current.
Table 6. RSET RESISTOR SETTINGS
LED Current [mA] RSET [k W ]
20 24.9
Tight current regulation for all channels is possible over
a wide range of input and LED voltages due to independent
current sensing circuitry on each channel. The LED
channels have a low dropout of 0.4 V or less for all current
ranges and supply voltages. This helps improve heat
dissipation and efficiency.
Upon power ? up, an under ? voltage lockout circuit sets all
outputs to off. Once the VDD supply voltage is greater than
the under ? voltage lockout threshold, the device channel can
be turned on. The on/off state of each channel LED1, LED2
and LED3 is independently controlled respectively by
PWM1, PWM2, PWM3. When a PWMx is high, the
associated LEDx channel is turned on.
60
100
175
8.45
5.23
3.01
http://onsemi.com
8
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相关代理商/技术参数 |
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| CAT4-11E | 制造商:ABB Control 功能描述:CONTACT BLKAUXFRNT1NO+1NC |
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