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参数资料
型号： MAX16814AUP+T
厂商： Maxim Integrated
文件页数： 21/25页
文件大小： 0K
描述： IC LED DVR HI-BRIGHT 4CH 20TSSOP
标准包装： 2,500
恒定电流： 是
拓扑： 回扫，高端，PWM，SEPIC，降压（降压），升压（升压）
输出数： 4
内部驱动器： 无
类型 - 主要： 汽车，背光，通用型
类型 - 次要： 高亮度 LED（HBLED），白色 LED
频率： 200kHz ~ 2MHz
电源电压： 4.75 V ~ 40 V
输出电压： 40V
安装类型： 表面贴装
封装/外壳： 20-TSSOP（0.173"，4.40mm 宽）裸露焊盘
供应商设备封装： 20-TSSOP-EP
包装： 带卷 (TR)
工作温度： -40°C ~ 125°C
MAX16814
Integrated, 4-Channel, High-Brightness LED
Driver with High-Voltage DC-DC Controller
PCB Layout Considerations
LED driver circuits based on the MAX16814 device use
a high-frequency switching converter to generate the
voltage for LED strings. Take proper care while laying
out the circuit to ensure proper operation. The switching-
converter part of the circuit has nodes with very fast volt-
age changes that could lead to undesirable effects on
the sensitive parts of the circuit. Follow the guidelines
below to reduce noise as much as possible:
1) Connect the bypass capacitor on V CC and DRV as
close to the device as possible and connect the
capacitor ground to the analog ground plane using
vias close to the capacitor terminal. Connect SGND
of the device to the analog ground plane using a via
close to SGND. Lay the analog ground plane on the
inner layer, preferably next to the top layer. Use the
analog ground plane to cover the entire area under
critical signal components for the power converter.
2) Have a power ground plane for the switching-con-
verter power circuit under the power components
(input filter capacitor, output filter capacitor, inductor,
MOSFET, rectifier diode, and current-sense resistor).
Connect PGND to the power ground plane as close
to PGND as possible. Connect all other ground con-
nections to the power ground plane using vias close
to the terminals.
Maxim Integrated
3) There are two loops in the power circuit that carry
high-frequency switching currents. One loop is when
the MOSFET is on (from the input filter capacitor
positive terminal, through the inductor, the internal
MOSFET, and the current-sense resistor, to the input
capacitor negative terminal). The other loop is when
the MOSFET is off (from the input capacitor positive
terminal, through the inductor, the rectifier diode,
output filter capacitor, to the input capacitor nega-
tive terminal). Analyze these two loops and make the
loop areas as small as possible. Wherever possible,
have a return path on the power ground plane for the
switching currents on the top layer copper traces, or
through power components. This reduces the loop
area considerably and provides a low-inductance
path for the switching currents. Reducing the loop
area also reduces radiation during switching.
4) Connect the power ground plane for the constant-
current LED driver part of the circuit to LEDGND as
close to the device as possible. Connect SGND to
PGND at the same point.
21
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相关代理商/技术参数
参数描述
MAX16814BEUP+ 功能描述:LED照明驱动器 4Ch HB Drvr w/High-V DC/DC Controller 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
MAX16814BEUP+T 功能描述:LED照明驱动器 4Ch HB Drvr w/High-V DC/DC Controller 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
MAX16814BUTP+ 制造商:Maxim Integrated Products 功能描述:INTEGRATED, 4-CHANNEL, HIGH-BRIGHTNESS LED DRIVER WITH HIGH- - Rail/Tube
MAX16814BUTP+T 制造商:Maxim Integrated Products 功能描述:INTEGRATED, 4-CHANNEL, HIGH-BRIGHTNESS LED DRIVER WITH HIGH- - Tape and Reel
MAX16814BUUP+ 制造商:Maxim Integrated Products 功能描述:LED DRIVER - Rail/Tube
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