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| 型号： | MAX17149ETE+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 1/21页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR 6CH STEP UP 16QFNEP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 系列： | Quick-PWM™ |
| 拓扑： | 开路漏极，PWM，升压（升压） |
| 输出数： | 6 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 车载，背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 可调节/可选择 |
| 电源电压： | 3 V ~ 26 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFQFN 裸露焊盘 |
| 供应商设备封装： | 16-TQFN（3x3） |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 85°C |
19-5676; Rev 1; 9/11
EVALUA
TION KIT
AVA ILABLE
Low-Cost, 6-String WLED Drivers with
Quick-PWM Step-Up Converter
General Description
The MAX17129/MAX17149 are high-efficiency drivers
for white LEDs. They are designed for small- to medium-
sized LCDs that employ an array of LEDs as the light
source. An internal switch step-up controller with Quick-
PWM K drives the LED array, which can be configured for
up to 6 strings in parallel and either 11 LEDs (MAX17129)
or 6 LEDs in series (MAX17149) per string. Each string
is terminated with a ballast that achieves Q 2% current-
regulation accuracy, ensuring even LED brightness and
provides an adjustable 10mA to 45mA full-scale LED
current. The devices have a wide input voltage range of
6V to 26V. The MAX17129 integrates an LDO to simplify
applications that have a single high-voltage supply. The
devices also feature a low-input-voltage mode for appli-
cations that have a 3V to 5.5V supply voltage.
The devices support both PWM and hybrid dimming
mode. In PWM dimming mode, the external PWM signal
directly controls the brightness of LEDs. The dimming
frequency ranges from 100Hz to 25kHz with 400ns mini-
mum on-time. In hybrid dimming mode, the LED current
amplitude can be adjusted to 25% of full-scale LED cur-
rent to improve system efficiency when brightness is low.
The devices have multiple features to protect the con-
troller from fault conditions. Separate voltage-feedback
loops limit the output voltage to safe operation. The open
and short-LED detection shuts down the faulty string
while keeping other strings operating normally.
The devices feature cycle-by-cycle current limit on the
internal switch to provide consistent operation and soft-
start capability. If the devices are in current-limit condi-
tion, the step-up converter is latched off after an internal
timer expires. A thermal-shutdown circuit provides anoth-
Features
S 3V to 26V Input Supply Voltage
S Up to Six Parallel Strings of Multiple Series-
Connected LEDs
S Step-Up Regulator with Quick-PWM Control Scheme
S Two-Level Selectable Switching Frequency
S 0.25 I Internal HV Power MOSFET (48V max)
S Low String Feedback Voltage: 275mV at 20mA
LED Current
S Full-Scale LED Current Adjustable from 10mA to
45mA
S ±2% Current Regulation Accuracy Between Strings
S Support PWM and Hybrid Dimming Mode
S 100:1 Dimming Ratio
S 100Hz to 25kHz Dimming Frequency for PWM
Dimming Mode
S Open and Short LED Protection
S Output Overvoltage Protection
S Small 16-Pin, 3mm x 3mm Thin QFN Package
Applications
Notebook, Subnotebook, and Tablet Computer
Displays
Automotive Systems
Handy Terminals
Ordering Information
er level of protection and prevents ICs from damage.
The ICs’ step-up controller features an internal 0.25 I (typ),
PART
MAX17129 ETE +
TEMP RANGE
-40 ° C to +85 ° C
PIN-PACKAGE
16 Thin QFN-EP*
48V (max) power MOSFET with lossless current sense and
accurate cycle-by-cycle current limit. The Quick-PWM con-
trol architecture provides fast load-transient response with-
out requiring an external loop compensation component,
simplifies the external circuitry, and saves board area. The
Quick-PWM control scheme has constant off-time and
adjustable pseudo-fixed frequency, which enables a wide
variety of applications that can trade off component size
for operating frequency. Low feedback voltage at each
LED string (275mV typ at 20mA LED current) helps reduce
power loss and improve efficiency.
The ICs are available in a 16-pin, thin QFN package with
0.5mm lead spacing. The package is 3mm x 3mm with a
maximum thickness of 0.8mm for ultra-thin LCD panel design.
MAX17149 ETE+ -40 ° C to +85 ° C 16 Thin QFN-EP*
+ Denotes lead(Pb)-free/RoHS-compatible package.
* EP = Exposed pad.
Simplified Operating Circuit appears at end of data sheet.
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
_______________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX17149ETE+ | 功能描述:LED照明驱动器 6-String White LED Driver 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 |
| MAX17149ETE+T | 功能描述:LED照明驱动器 6 WLED Driver with Quick-PWM 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 |
| MAX1714AEEP | 功能描述:电流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX1714AEEP+ | 功能描述:电流型 PWM 控制器 Step-Down Controller for Notebook RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX1714AEEP+T | 功能描述:电流型 PWM 控制器 Step-Down Controller for Notebook RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
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