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参数资料
| 型号： | LT3590EDC#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 11/16页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER WHITE BCKLGT 6-DFN |
| 标准包装： | 2,500 |
| 拓扑： | PWM，降压（降压） |
| 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： | 650kHz ~ 1.05MHz |
| 电源电压： | 4.5 V ~ 55 V |
| 输出电压： | 55V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-WFDFN 裸露焊盘 |
| 供应商设备封装： | 6-DFN-EP（2x2） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
LT3590
APPLICATIONS INFORMATION
The dimming range can be further extended by changing
the amplitude of the PWM signal. The height of the PWM
signal sets the commanded sense voltage across the sense
resistor through the CTRL pin. In this manner both analog
dimming and direct PWM dimming extend the dimming
range for a given application. The color of the LEDs no
longer remains constant because the forward current of
the LED changes with the height of the CTRL signal. For
the ten LED application described above, the LEDs can be
dimmed ?rst, modulating the duty cycle of the PWM signal.
Once the minimum duty cycle is reached, the height of the
PWM signal can be decreased below 1.5V down to 150mV.
The use of both techniques together allows the average
LED current for the ten LED application to be varied from
50mA down to less than 50μA.
Internal Voltage Regulator
The LT3590 has a 3.3V onboard voltage regulator capable
of sourcing up to 1mA of current for use by an external
device. This feature may be used to power-up a controller
from the LT3590. The 3.3V is available even during shut-
down. It is required to place a 0.1μF capacitor from V REG
to ground. The regulator current is limited to 1.5mA.
Board Layout Considerations
As with all switching regulators, careful attention must be
paid to the PCB board layout and component placement.
To prevent electromagnetic interference (EMI) problems,
proper layout of high frequency switching paths is essen-
tial. Minimize the length and area of all traces connected
to the switching node pin (SW). Keep the sense voltage
pins (V IN and LED) away from the switching node. Place
the output capacitor, C2, next to the V IN pin. Always use
a ground plane under the switching regulator to minimize
interplane coupling. Recommended component placement
is shown in Figure 8.
C3
GND
GND
V REG
CTRL
V REG
CTRL
GND
GND
C3
V REG
V REG
5
6
4
3
CTRL
CTRL
1
2
7
6
5
7
8
2
1
3
4
V IN
V IN
V IN
V IN
C1
C1
R1
LED
GND
SW
R1
C2
L1
C2
OUT
LED
SW
L1
OUT
3590 F08
(a) SC70 Package
(b) 2mm × 2mm DFN Package
Figure 8. Recommended Component Placement
3590f
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3590ESC8#PBF | 制造商:Linear Technology 功能描述:LED DRIVER BUCK PWM/ANALOGUE 制造商:Linear Technology 功能描述:LED DRIVER, BUCK, PWM/ANALOGUE, 850KHZ, SC-70-8; Topology:Buck (Step Down); No. of Outputs:1; Output Current:50mA; Output Voltage:55V; Driver Case Style:SC-70; Input Voltage Min:4.5V; Input Voltage Max:55V; Switching Frequency:850kHz;RoHS Compliant: Yes |
| LT3590ESC8#TRMPBF | 功能描述:IC LED DRVR WHITE BCKLGT SC-70-8 RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:60 系列:- 恒定电流:- 恒定电压:- 拓扑:线性（LDO），PWM，升压（升压） 输出数:8 内部驱动器:是 类型 - 主要:背光 类型 - 次要:RGB，白色 LED 频率:500kHz ~ 1.5MHz 电源电压:4.75 V ~ 26 V 输出电压:45V 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* 工作温度:-40°C ~ 85°C |
| LT3590ESC8#TRPBF | 功能描述:IC LED DRVR WHITE BCKLGT SC-70-8 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 |
| LT3590ESC8-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:48V Buck Mode LED Driver in SC70 and 2mm x 2mm DFN |
| LT3590ESC8-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:48V Buck Mode LED Driver in SC70 and 2mm x 2mm DFN |
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