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| 型号： | MAX16818ETI+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 1/25页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVR PWM CONTROL 28-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 拓扑： | 高端，低端，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） |
| 频率： | 125kHz ~ 1.5MHz |
| 电源电压： | 4.75 V ~ 5.5 V，7 V ~ 28 V |
| 输出电压： | 5.1V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
19-0666; Rev 2; 3/09
ATION
EVALU
AVAIL
KIT
ABLE
1.5MHz, 30A High-Efficiency, LED Driver
with Rapid LED Current Pulsing
General Description
The MAX16818 pulse-width modulation (PWM) LED dri-
ver controller provides high-output-current capability in
a compact package with a minimum number of external
components. The MAX16818 is suitable for use in syn-
chronous and nonsynchronous step-down (buck)
topologies, as well as in boost, buck-boost, SEPIC, and
Cuk LED drivers. The MAX16818 is the first LED driver
controller that enables Maxim’s technology for fast LED
current transients of up to 20A/μs and 30kHz dimming
frequency.
This device utilizes average-current-mode control that
enables optimal use of MOSFETs with optimal charge
and on-resistance characteristics. This results in the
minimized need for external heatsinking even when
delivering up to 30A of LED current. True differential
sensing enables accurate control of the LED current. A
wide dimming range is easily implemented to accom-
modate an external PWM signal. An internal regulator
enables operation over a wide input voltage range:
4.75V to 5.5V or 7V to 28V and above with a simple
external biasing device. The wide switching frequency
Features
? High-Current LED Driver Controller IC, Up to 30A
Output Current
? Average-Current-Mode Control
? True-Differential Remote-Sense Input
? 4.75V to 5.5V or 7V to 28V Input Voltage Range
? Programmable Switching Frequency or External
Synchronization from 125kHz to 1.5MHz
? Clock Output for 180° Out-of-Phase Operation
? Integrated 4A Gate Drivers
? Output Overvoltage and Hiccup Mode
Overcurrent Protection
? Thermal Shutdown
? Thermally Enhanced 28-Pin Thin QFN Package
? -40°C to +125°C Operating Temperature Range
Ordering Information
range, up to 1.5MHz, allows for the use of small induc-
tors and capacitors.
PART
MAX16818ATI+
TEMP RANGE
-40°C to +125°C
PIN-PACKAGE
28 TQFN-EP*
The MAX16818 features a clock output with 180° phase
delay to control a second out-of-phase LED driver to
reduce input and output filter capacitors size or to mini-
mize ripple currents. The MAX16818 offers programma-
ble hiccup, overvoltage, and overtemperature protection.
The MAX16818ETI+ is rated for the extended tempera-
ture range (-40°C to +85°C) and the MAX16818ATI+ is
rated for the automotive temperature range (-40°C to
+125°C). This LED driver controller is available in a
lead-free, 0.8mm high, 5mm x 5mm 28-pin TQFN pack-
age with exposed paddle.
MAX16818ETI+ -40°C to +85°C 28 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Simplified Diagram
7V TO 28V
C1
Applications
Front Projectors/Rear Projection TVs
EN
ILIM
IN
DH
Q1
L1
V LED
Portable and Pocket Projectors
Automotive, Bus/Truck Exterior Lighting
LCD TVs and Display Backlight
MAX16818
DL
Q2
C2
Automotive Emergency Lighting and Signage
Pin Configuration appears at end of data sheet.
OVI
CLP
CSP
PGND
R1
HIGH-FREQUENCY
PULSE TRAIN
NOTE: MAXIM TOPOLOGY
Q3
________________________________________________________________ Maxim Integrated Products
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.
1
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