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参数资料
| 型号： | LTC3205EUF |
| 厂商： | Linear Technology |
| 文件页数： | 5/16页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WT/RGB BCKLGT 24-QFN |
| 标准包装： | 91 |
| 拓扑： | PWM，降压（降压），升压（升压），切换式电容器（充电泵） |
| 输出数： | 9 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | RGB，白色 LED |
| 频率： | 600kHz ~ 1.1MHz |
| 电源电压： | 2.8 V ~ 4.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 供应商设备封装： | 24-QFN 裸露焊盘（4x4） |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 85°C |
LTC3205
TYPICAL PERFOR A CE CHARACTERISTICS
Input Supply Voltage Required for
Higher LED Currents
Compliance Voltage for Higher
LED Currents
RGB LED Turn On and Off
Characteristics
3.9
3.7
T A = 25 ° C
120
100
V IN = 3.6V
T A = 25 ° C
I RGB = 250 μ A
3.5
3.3
3.1
2.9
I MS
I RGB
80
60
40
I RGB = 200 μ A
I RGB = 150 μ A
I RGB = 100 μ A
I LED
3mA/DIV
0mA
2.7
20
I RGB = 50 μ A
5 μ s/DIV
3205 G011
2.5
25
50
75
100 125 175 200 225 250
0
0
0.2
0.4 0.6 0.8
1.0
I MS OR I RGB CURRENT ( μ A)
PI FU CTIO S
3205 G14
LED PIN VOLTAGE (V)
3205 G15
MAIN1-MAIN4 (Pins 2, 1, 24, 23): Current Source
Outputs for the Main Display White LEDs. The current for
the main display is controlled by the resistor on the I MS
pin. The LEDs on the main display can be set to 100%,
50%, 25% or 0% of full-scale programmed current under
software control. See Tables 1 and 2.
C1 + , C1 – , C2 + , C2 – (Pins 5, 4, 6, 3): Charge Pump Flying
Capacitor Pins. A 1 μ F X7R or X5R ceramic capacitor should be
connected from C1 + to C1 – and another from C2 + to C2 – .
D IN (Pin 7): Input Data for the 16-Bit Serial Port. Serial data
is shifted in one bit per clock to control the LTC3205 (see
Table 1). The logic level for D IN is referenced to DV CC .
SCLK (Pin 8): Clock Input for the 16-Bit Serial Port (see
Figure 3). The logic level for SCLK is referenced to DV CC .
LD (Pin 9): Load Input for the 16-Bit Serial Port. Command
data is loaded into the command latch on the falling edge
of LD (see Figure 3). The logic level for LD is referenced to
DV CC .
ENRGB (Pin 10): This pin is used to enable and disable the
red, green and blue current sources. Once ENRGB is brought
high, the LTC3205 illuminates the RGB display with the color
combination that was previously programmed via the serial
port. When the main and sub displays are off and ENRGB is
low, the LTC3205 will be in shutdown. The logic level for
STEPUP (Pin 11): A logic high on this pin forces the
LTC3205’s charge pump to operate in 2:3 step-up mode,
thereby eliminating any possibility of the device switching
from 1:1 mode to 2:3 mode during critical communication
periods. The logic level for STEPUP is referenced to DV CC .
DV CC (Pin 12): This pin sets the logic reference level of the
LTC3205.
I RGB (Pin 13): This pin controls the amount of LED current
at the RED, GREEN and BLUE LED pins. The I RGB pin
servos to 1.223V when there is a resistor to ground. The
current in the RED, GREEN and BLUE LEDs will be 400
times the current at the I RGB pin when programmed to full
scale (see Tables 1 and 3).
I MS (Pin 14): This pin controls the maximum amount of
LED current in both the main and sub LED displays. The
I MS pin servos to 1.223V when there is a resistor to
ground. The currents in the main and sub display LEDs will
be 100, 200 or 400 times the current at the I MS pin
depending on which setting is chosen from the serial port.
CPO (Pin 15): Output of the Charge Pump. This output
should be used to power white, blue and “true” green
LEDs. Red LEDs can be powered from V IN or CPO. An X5R
or X7R low impedance (ceramic) 1 μ F charge storage
capacitor is required on CPO.
ENRGB is referenced to DV CC .
3205f
5
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3205EUF#PBF | 功能描述:IC LED DRVR WT/RGB BCKLGT 24-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:6,000 系列:- 恒定电流:- 恒定电压:- 拓扑:开路漏极，PWM 输出数:4 内部驱动器:是 类型 - 主要:LED 闪烁器 类型 - 次要:- 频率:400kHz 电源电压:2.3 V ~ 5.5 V 输出电压:- 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘 供应商设备封装:8-HVSON 包装:带卷 (TR) 工作温度:-40°C ~ 85°C 其它名称:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND |
| LTC3205EUF#TR | 功能描述:IC LED DRVR WT/RGB BCKLGT 24-QFN RoHS:否 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:6,000 系列:- 恒定电流:- 恒定电压:- 拓扑:开路漏极，PWM 输出数:4 内部驱动器:是 类型 - 主要:LED 闪烁器 类型 - 次要:- 频率:400kHz 电源电压:2.3 V ~ 5.5 V 输出电压:- 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘 供应商设备封装:8-HVSON 包装:带卷 (TR) 工作温度:-40°C ~ 85°C 其它名称:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND |
| LTC3205EUF#TRPBF | 功能描述:IC LED DRVR WT/RGB BCKLGT 24-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:6,000 系列:- 恒定电流:- 恒定电压:- 拓扑:开路漏极，PWM 输出数:4 内部驱动器:是 类型 - 主要:LED 闪烁器 类型 - 次要:- 频率:400kHz 电源电压:2.3 V ~ 5.5 V 输出电压:- 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘 供应商设备封装:8-HVSON 包装:带卷 (TR) 工作温度:-40°C ~ 85°C 其它名称:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND |
| LTC3205EUFPBF | 制造商:Linear Technology 功能描述:Multidisplay LED Controller,LTC3205 |
| LTC3205XEUF#PBF | 功能描述:IC LED DRVR WT/RGB BCKLGT 24-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:6,000 系列:- 恒定电流:- 恒定电压:- 拓扑:开路漏极，PWM 输出数:4 内部驱动器:是 类型 - 主要:LED 闪烁器 类型 - 次要:- 频率:400kHz 电源电压:2.3 V ~ 5.5 V 输出电压:- 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘 供应商设备封装:8-HVSON 包装:带卷 (TR) 工作温度:-40°C ~ 85°C 其它名称:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND |
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