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MAX16814
Integrated, 4-Channel, High-Brightness LED
Driver with High-Voltage DC-DC Controller
General Description
The MAX16814 high-efficiency, high-brightness LED (HB
LED) driver provides up to four integrated LED current-
sink channels. An integrated current-mode switching
DC-DC controller drives a DC-DC converter that pro-
vides the necessary voltage to multiple strings of HB
LEDs. The MAX16814 accepts a wide 4.75V to 40V input
voltage range and withstands direct automotive load-
dump events. The wide input range allows powering HB
LEDs for small to medium-sized LCD displays in automo-
tive and general lighting applications.
An internal current-mode switching DC-DC controller
supports the boost, coupled-inductor boost-buck, or
SEPIC topologies and operates in an adjustable fre-
quency range between 200kHz and 2MHz. It can also be
used for single-inductor boost-buck topology in conjunc-
tion with the MAX15054 and an additional MOSFET. The
current-mode control with programmable slope com-
pensation provides fast response and simplifies loop
compensation. The MAX16814 also features an adaptive
output-voltage control scheme that minimizes the power
dissipation in the LED current-sink paths.
The MAX16814 consists of four identical linear current
source channels to drive four strings of HB LEDs. The
channel current is adjustable from 20mA to 150mA with
an accuracy of ±3% using an external resistor. The
external resistor sets all 4-channel currents to the same
Features
S 4-Channel Linear LED Current Sinks with Internal
MOSFETs
Full-Scale LED Current Adjustable from 20mA
to 150mA
Drives One to Four LED Strings
S Boost, SEPIC, or Coupled-Inductor Boost-Buck
Current-Mode DC-DC Controller
200kHz to 2MHz Programmable Switching
Frequency
External Switching Frequency Synchronization
S Adaptive Output-Voltage Optimization to Minimize
Power Dissipation
S 4.75V to 40V Operating Input Voltage Range
S Less than 40μA Shutdown Current
S 5000:1 PWM Dimming at 200Hz (MAX16814A _ _
and MAX16814U_ _ Only)
S Open-Drain Fault Indicator Output
S Open-LED and LED Short Detection and
Protection
S Overtemperature Protection
S Thermally Enhanced, 20-Pin TQFN, QFND, and
value. The device allows connecting multiple channels
in parallel to achieve higher current per LED string. The
MAX16814 also features pulsed dimming control, on all
TSSOP Packages
Ordering Information
four channels through a logic input (DIM). In addition,the
MAX16814A_ _ and MAX16814U_ _ include a unique
feature that allows a very short minimum pulse width as
low as 1μs.
The MAX16814 includes an output overvoltage, open-
LED detection and protection, programmable shorted
LED detection and protection, and overtemperature pro-
tection. The device operates over the -40 N C to +125 N C
automotive temperature range. The MAX16814 is avail-
able in 6.5mm x 4.4mm, 20-pin TSSOP, 4mm x 4mm,
PART TEMP RANGE
MAX16814ATP+ -40 ° C to +125 ° C
MAX16814ATP/V+ -40 ° C to +125 ° C
MAX16814AGP/VY+ -40 ° C to +125 ° C
MAX16814AUP+ -40 ° C to +125 ° C
MAX16814AUP/V+ -40 ° C to +125 ° C
MAX16814BETP+ -40 ° C to +85 ° C
MAX16814BEUP+ -40 ° C to +85 ° C
MAX16814BUTP+ 0 ° C to +85 ° C
PIN-PACKAGE
20 TQFN-EP*
20 TQFN-EP*
20 QFND-EP* (SW)
20 TSSOP-EP*
20 TSSOP-EP*
20 TQFN-EP*
20 TSSOP-EP*
20 TQFN-EP*
20-pin TQFN and QFND packages.
Applications
MAX16814BUUP+
MAX16814UTP+
MAX16814UUP+
0 ° C to +85 ° C
0 ° C to +85 ° C
0 ° C to +85 ° C
20 TSSOP-EP*
20 TQFN-EP*
20 TSSOP-EP*
Automotive Displays LED Backlights
Automotive RCL, DRL, Front Position, and Fog
Lights
LCD TV and Desktop Display LED Backlights
Architectural, Industrial, and Ambient Lighting
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* EP = Exposed pad.
/V Denotes an automotive qualified part, (SW) = side wettable.
Typical Operating Circuit and 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.maximintegrated.com.
19-4722; Rev 9; 11/13
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相关代理商/技术参数
MAX16814BEUP+ 功能描述:LED照明驱动器 4Ch HB Drvr w/High-V DC/DC Controller 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
MAX16814BEUP+T 功能描述:LED照明驱动器 4Ch HB Drvr w/High-V DC/DC Controller 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
MAX16814BUTP+ 制造商:Maxim Integrated Products 功能描述:INTEGRATED, 4-CHANNEL, HIGH-BRIGHTNESS LED DRIVER WITH HIGH- - Rail/Tube
MAX16814BUTP+T 制造商:Maxim Integrated Products 功能描述:INTEGRATED, 4-CHANNEL, HIGH-BRIGHTNESS LED DRIVER WITH HIGH- - Tape and Reel
MAX16814BUUP+ 制造商:Maxim Integrated Products 功能描述:LED DRIVER - Rail/Tube
MAX16814BUUP+T 制造商:Maxim Integrated Products 功能描述:LED DRIVER - Tape and Reel
MAX16814CATP+ 制造商:Maxim Integrated Products 功能描述:INTEGRATED, 4-CHANNEL, HIGH-BRIGHTNESS LED DRIVER WITH HIGH- - Rail/Tube
MAX16814CAUP+ 制造商:Maxim Integrated Products 功能描述:INTEGRATED, 4-CHANNEL, HIGH-BRIGHTNESS LED DRIVER WITH HIGH- - Rail/Tube