- 您现在的位置：买卖IC网 > PDF目录20779 > MAX16831ATJ+ (Maxim Integrated)IC LED DRIVR HIGH BRIGHT 32-TQFN PDF资料下载
参数资料
| 型号： | MAX16831ATJ+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 15/19页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVR HIGH BRIGHT 32-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 拓扑： | PWM，降压（降压），升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 无 |
| 类型 - 主要： | 车载 |
| 类型 - 次要： | 高亮度 LED（HBLED），RGB |
| 频率： | 125kHz ~ 600kHz |
| 电源电压： | 5.5 V ~ 76 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 供应商设备封装： | 32-TQFN-EP（5x5） |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 125°C |
| 产品目录页面： | 1425 (CN2011-ZH PDF) |
MAX16831
High-Voltage, High-Power LED Driver with
Analog and PWM Dimming Control
When using the MAX16831 in a boost or buck-boost
configuration, the input RMS current is low and the
input capacitance can be small.
Operating the MAX16831 Without the
Dimming Switch
The MAX16831 can also be used in the absence of the
dimming MOSFET. In this case, the PWM dimming per-
formance is compromised but in applications that do
not require dimming, the MAX16831 can still be used.
A short circuit across the load will cause the MAX16831
to disable the gate drivers and they will remain off until
the input power is recycled.
Switching Power MOSFET Losses
When selecting MOSFETs for switching, consider the
total gate charge, power dissipation, the maximum
drain-to-source voltage, and package thermal imped-
ance. The product of the MOSFET gate charge and
R DS(ON) is a figure of merit, with a lower number signi-
fying better performance. Select MOSFETs optimized
for high-frequency switching applications.
MOSFET losses may be broken into three categories:
conduction loss, gate drive loss, and switching loss.
The following simplified power loss equation is true for
all the different configurations.
P LOSS = P CONDUCTION + P GATEDRIVE + P SWITCH
Layout Recommendations
Typically, there are two sources of noise emission in a
? 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 sta-
ble, jitter-free operation. Keep switching loops short.
? Connect AGND, SGND, and QGND 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 (2oz vs. 1oz) 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, C1 and C2, during the off-time of the dimming
cycle, ensure that the PCB area close to these com-
ponents has extremely low leakage. Discharge of
these capacitors due to leakage may result in
degraded dimming performance.
Pin Configuration
TOP VIEW
switching power supply: high di/dt loops and high dv/dt
surfaces. For example, traces that carry the drain cur-
32
31
30
29
28
27
26
25
rent often form high di/dt loops. Similarly, the heatsink
of the MOSFET connected to the device drain presents
a high dv/dt source; therefore, minimize the surface
area of the heatsink as much as possible. 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 performance
and power dissipation. Follow these guidelines for
N.C.
UVEN
REG1
AGND
REF
DIM
RTSYNC
CLKOUT
1
2
3
4
5
6
7
8
+
*EP
MAX16831
24
23
22
21
20
19
18
17
N.C.
DGT
QGND
SNS-
SNS+
DRI
DRV
SGND
good PCB layout:
? Use a large copper plane under the MAX16831
9
10
11
12
13
14
15
16
package. Ensure that all heat-dissipating compo-
nents have adequate cooling. Connect the exposed
pad of the device to the ground plane.
Maxim Integrated
*EP = EXPOSED PAD
TQFN
(5mm x 5mm)
15
相关PDF资料 |
PDF描述 |
|---|---|
| GEC05DREI-S93 | CONN EDGECARD 10POS .100 EYELET |
| TAJE108M004RNJ | CAP TANT 1000UF 4V 20% 2917 |
| MSL3162BT-R | IC LED DRVR 16 CHAN PWM 40TQFN |
| EEC08DRYS-S93 | CONN EDGECARD 16POS DIP .100 SLD |
| TAJE108M002RNJ | CAP TANT 1000UF 2.5V 20% 2917 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16831ATJ/V+ | 功能描述:LED照明驱动器 w/Analog & PWM Dimming Control 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 |
| MAX16831ATJ/V+T | 功能描述:LED照明驱动器 w/Analog & PWM Dimming Control 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 |
| MAX16831ATJ+ | 功能描述:LED照明驱动器 w/Analog & PWM Dimming Control 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 |
| MAX16831ATJ+T | 功能描述:LED照明驱动器 w/Analog & PWM Dimming Control 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 |
| MAX16831EVKIT+ | 功能描述:LED 照明开发工具 MAX16831 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: |
发布紧急采购，3分钟左右您将得到回复。