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| 型号： | MAX16834AUP+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 1/23页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR HIGH BRIGHT 20-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 拓扑： | PWM，SEPIC，降压（降压），升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 无 |
| 类型 - 主要： | 车载，背光 |
| 类型 - 次要： | 高亮度 LED（HBLED），RGB |
| 频率： | 100kHz ~ 1MHz |
| 电源电压： | 4.75 V ~ 28 V |
| 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 |
EVALUATION KIT AVAILABLE
AVAILAB
LE
MAX16834
High-Power LED Driver with Integrated High-Side LED
Current Sense and PWM Dimming MOSFET Driver
General Description
The MAX16834 is a current-mode high-brightness LED
(HB LED) driver for boost, boost-buck, SEPIC, and high-
side buck topologies. In addition to driving an n-channel
power MOSFET switch controlled by the switching con-
troller, it also drives an n-channel PWM dimming switch to
achieve LED PWM dimming. The MAX16834 integrates
all the building blocks necessary to implement a fixed-fre-
quency HB LED driver with wide-range dimming control.
The MAX16834 features constant-frequency peak cur-
rent-mode control with programmable slope compensa-
tion to control the duty cycle of the PWM controller.
A dimming driver designed to drive an external n-chan-
nel MOSFET in series with the LED string provides
wide-range dimming control up to 20kHz. In addition to
PWM dimming, the MAX16834 provides analog dim-
ming using a DC input at REFI. The programmable
switching frequency (100kHz to 1MHz) allows design
optimization for efficiency and board space reduction.
A single resistor from RT/SYNC to ground sets the
Features
o Wide Input Operating Voltage Range (4.75V to 28V)
o Works for Input Voltage > 28V with External
Voltage Clamp on V IN for Boost Converter
o 3000:1 PWM Dimming/Analog Dimming
o Integrated PWM Dimming MOSFET Driver
o Integrated High-Side Current-Sense Amplifier for
LED Current Sense in Boost-Buck Converter
o 100kHz to 1MHz Programmable High-Frequency
Operation
o External Clock Synchronization Input
o Programmable UVLO
o Internal 7V Low-Dropout Regulator
o Fault Output ( FLT) for Overvoltage, Overcurrent,
and Thermal Warning Faults
o Programmable True Differential Overvoltage
Protection
o 20-Pin TQFN-EP and TSSOP-EP Packages
Ordering Information
switching frequency from 100kHz to 1MHz while an
external clock signal at RT/SYNC disables the internal
oscillator and allows the MAX16834 to synchronize to
an external clock. The MAX16834’s integrated high-
side current-sense amplifier eliminates the need for a
PART
MAX16834ATP+
MAX16834ATP/V+
MAX16834AUP+
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
PIN-PACKAGE
20 TQFN-EP*
20 TQFN-EP*
20 TSSOP-EP*
Functional Diagrams
separate high-side LED current-sense amplifier in
boost-buck applications.
The MAX16834 operates over a wide supply range of
4.75V to 28V and includes a 3A sink/source gate driver
for driving a power MOSFET in high-power LED driver
applications. It can also operate at input voltages
greater than 28V in boost configuration with an external
voltage clamp. The MAX16834 is also suitable for DC-
DC converter applications such as boost or boost-
MAX16834AUP/V+ -40°C to +125°C 20 TSSOP-EP*
MAX16834AGP/VY+ -40°C to +125°C 20 QFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
/V denotes an automotive qualified part.
/VY denotes an automotive qualified part in a “side wettable
flank” package.
Simplified Application Circuit
buck. Additional features include external enable/
disable input, an on-chip oscillator, fault indicator out-
put ( FLT ) for LED open/short or overtemperature condi-
tions, and an overvoltage protection sense input
(OVP+) for true overvoltage protection.
V IN
BOOST LED DRIVER
LED+
The MAX16834 is available in a thermally enhanced
4mm x 4mm, 20-pin TQFN-EP package and in a thermal-
ly enhanced 20-pin TSSOP-EP package and is specified
ON
IN
MAX16834
NDRV
LEDs
over the automotive -40°C to +125°C temperature range.
Applications
OFF
ANALOG
DIM
PWMDIM
REFI
CS
DIMOUT
LED-
Single-String LED LCD Backlighting
Architectural and Decorative Lighting (MR16, M111)
Spot and Ambient Lights
Automotive Rear and Front Lighting
Projection System RGB LED Light Sources
Pin Configurations appear at end of data sheet.
Functional Diagrams continued at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
PGND
SENSE+
DC-DC Boost/Boost-Buck Converters
Pin Configurations appear at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maxim integrated .com.
19-4235; Rev 4; 8/11
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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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