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参数资料
| 型号： | MAX16812ATI/V+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 18/21页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVR HIGH BRIGHT 28-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 恒定电流： | 是 |
| 拓扑： | PWM，SEPIC，降压（降压），升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 车载 |
| 类型 - 次要： | 高亮度 LED（HBLED） |
| 频率： | 125kHz ~ 500kHz |
| 电源电压： | 5.5 V ~ 76 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 125°C |
Integrated High-Voltage LED Driver
with Analog and PWM Dimming Control
Layout Recommendations
Typically, there are two sources of noise emission in a
switching power supply: high di/dt loops and high dv/dt
surfaces. For example, traces that carry the drain cur-
rent often form high di/dt loops. Similarly, the drain of
the internal MOSFET connected to the LX pin presents
a dv/dt source. Keep all PCB traces carrying switching
currents as short as possible to minimize current loops.
Use ground planes for best results.
Careful PCB layout is critical to achieve low switching
losses and clean, stable operation. Use a multilayer
board whenever possible for better noise immunity and
power dissipation. Follow these guidelines for good
PCB layout:
? Use a large copper plane under the MAX16812
package. Ensure that all heat-dissipating compo-
nents have adequate cooling. Connect the exposed
pad of the device to the ground plane.
? Isolate the power components and high-current
paths from sensitive analog circuitry.
? Keep the high-current paths short, especially at the
ground terminals. This practice is essential for stable,
jitter-free operation. Keep switching loops short.
? Connect AGND and SGND to a ground plane.
Ensure a low-impedance connection between all
ground points.
? Keep the power traces and load connections short.
This practice is essential for high efficiency. Use
thick copper PCBs to enhance full-load efficiency.
? Ensure that the feedback connection to FB is short
and direct.
? Route high-speed switching nodes away from the
sensitive analog areas.
? To prevent discharge of the compensation capaci-
tors, C COMP1 and C COMP2 , during the off-time of
the dimming cycle, ensure that the PCB area close
to these components has extremely low leakage.
18
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16812EVKIT+ | 功能描述:LED 照明开发工具 Evaluation Kit for the MAX16812 RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: |
| MAX16813ATP/V+ | 制造商:Maxim Integrated Products 功能描述:IC LED DVR 4CH CTLR/DISC QFN |
| MAX16813ATP/V+T | 功能描述:LED照明驱动器 Integrated 4Ch HB LED Driver RoHS:否 制造商:Maxim Integrated 输入电压: 工作频率: 最大电源电流: 输出电流: 最大工作温度: 安装风格: 封装 / 箱体: |
| MAX16813ATP+ | 制造商:Maxim Integrated Products 功能描述:IC LED DVR 4CH CTLR/DISC QFN |
| MAX16813ATP+T | 功能描述:LED照明驱动器 Integrated 4Ch HB LED Driver RoHS:否 制造商:Maxim Integrated 输入电压: 工作频率: 最大电源电流: 输出电流: 最大工作温度: 安装风格: 封装 / 箱体: |
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