参数资料
型号: LT3498EDDB#TRPBF
厂商: Linear Technology
文件页数: 17/24页
文件大小: 0K
描述: IC LED DRVR WT/OLED BCKLGT 12DFN
标准包装: 2,500
拓扑: PWM,升压(升压)
输出数: 1
内部驱动器:
类型 - 主要: 背光
类型 - 次要: OLED,白色 LED
频率: 1.8MHz ~ 2.8MHz
电源电压: 2.5 V ~ 12 V
输出电压: 32V
安装类型: 表面贴装
封装/外壳: 12-WFDFN 裸露焊盘
供应商设备封装: 12-DFN-EP(3x2)
包装: 带卷 (TR)
工作温度: -40°C ~ 85°C
LT3498
APPLICATIONS INFORMATION — LED AND OLED DRIVER
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 essential.
Minimize the length and area of all traces connected to
the switching node pins (SW1 and SW2). Keep the sense
voltage pins (CAP1 and LED1) away from the switching
node. The FB2 connection for the feedback resistor R FB2
should be tied directly from the V OUT2 pin to the FB2
pin and be kept as short as possible, ensuring a clean,
noise-free connection. Place C OUT1 and C OUT2 next to the
CAP1 and CAP2 pins respectively. Always use a ground
plane ender the switching regulator to minimize interplane
coupling. Recommended component placement is shown
in Figure 13.
CTRL1
LED1
R SENSE1
1
C1
12
CAP1
SW1
2
11
L1
GND
GND
3
10
V IN
C IN
4
9
L2
CTRL2
R FB2
5
6
C3
8
7
SW2
V OUT2
FB2
GND
C2
V OUT2
CAP2
3498 F13
VIAS TO GROUND PLANE REQUIRED TO
IMPROVE THERMAL PERFORMANCE
VIAS TO VOUT2
Figure 13. Recommended Board Layout
3498fa
17
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