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参数资料
| 型号： | MAX16834EVKIT+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 21/23页 |
| 文件大小： | 0K |
| 描述： | EVAL KIT FOR MAX16834 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 电流 - 输出 / 通道： | 1A |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 28V |
| 特点： | 可调光 |
| 输入电压： | 7 ~ 28V |
| 已供物品： | 板 |
| 已用 IC / 零件： | MAX16834 |
MAX16834
High-Power LED Driver with Integrated High-Side LED
Current Sense and PWM Dimming MOSFET Driver
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 heatsink
of the MOSFET connected to the device drain presents
a dv/dt source; therefore, minimize the surface area of
the heatsink as much as is compatible with the MOS-
FET power dissipation or shield it. Keep all PCB traces
carrying switching currents as short as possible to mini-
mize 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:
1) Use a large contiguous copper plane under the
MAX16834 package. Ensure that all heat-dissipat-
ing components have adequate cooling.
2) Isolate the power components and high-current
path from the sensitive analog circuitry.
3) Keep the high-current paths short, especially at the
ground terminals. This practice is essential for sta-
ble, jitter-free operation. Keep switching loops short
such that:
a) The anode of D1 must be connected very close
to the drain of the MOSFET Q1.
Maxim Integrated
b) The cathode of D1 must be connected very
close to C OUT .
c) C OUT and the current-sense resistor R8 must be
connected directly to the ground plane.
4) Connect PGND and SGND to a star-point configura-
tion.
5) Keep the power traces and load connections short.
This practice is essential for high efficiency. Use
thick copper PCBs (2oz vs.1oz) to enhance full-load
efficiency.
6) Route high-speed switching nodes away from the
sensitive analog areas. Use an internal PCB layer
for the PGND and SGND plane as an EMI shield to
keep radiated noise away from the device, feed-
back dividers, and analog bypass capacitors.
7) To prevent discharge of the compensation capaci-
tors during the off-time of the dimming cycle,
ensure that the PCB area close to these compo-
nents has extremely low leakage. Discharge of
these capacitors due to leakage results in reduced
performance of the dimming circuitry.
21
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16834EVKIT+ | 功能描述:LED 照明开发工具 MAX16834 Eval Kit 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: |
| MAX16835ATE/V+ | 制造商:Maxim Integrated Products 功能描述:HIGH-VOLTAGE, 350MA, ADJUSTABLE LINEAR HIGH-BRIGHTNESS LED D - Rail/Tube |
| MAX16835ATE/V+T | 制造商:Maxim Integrated Products 功能描述:HIGH-VOLTAGE, 350MA, ADJUSTABLE LINEAR HIGH-BRIGHTNESS LED D - Tape and Reel |
| MAX16835ATE+ | 功能描述:LED照明驱动器 350mA Adj Linear HB 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 |
| MAX16835ATE+T | 功能描述:LED照明驱动器 350mA Adj Linear HB 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 |
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