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| 型号： | MAX16821CATI+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVR HIGH BRIGHT 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 ~ 125°C |
19-0881; Rev 2; 1/10
ATION
EVALU
AVAILA
KIT
BLE
High-Power Synchronous HBLED
Drivers with Rapid Current Pulsing
General Description
Features
The MAX16821A/MAX16821B/MAX16821C pulse-
width-modulation (PWM) LED driver controllers provide
high output-current capability in a compact package
with a minimum number of external components. The
MAX16821A/MAX16821B/MAX16821C are suitable for
use in synchronous and nonsynchronous step-down
(buck), boost, buck-boost, SEPIC, and Cuk LED drivers. A
logic input (MODE) allows the devices to switch between
synchronous buck and boost modes of operation. These
devices are the first high-power drivers designed specifi-
cally to accommodate common-anode HBLEDs.
The ICs offer average current-mode control that enable
the use of MOSFETs with optimal charge and on-resis-
tance figure of merit, thus minimizing the need for
external heatsinking even when delivering up to 30A of
LED current.
The differential sensing scheme provides accurate con-
trol of the LED current. The ICs operate from a 4.75V to
5.5V supply range with the internal regulator disabled
(V CC connected to IN). These devices operate from a
7V to 28V input supply voltage with the internal regula-
tor enabled.
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Up to 30A Output Current
True-Differential Remote Output Sensing
Average Current-Mode Control
4.75V to 5.5V or 7V to 28V Input-Voltage Range
0.1V/0.03V LED Current-Sense Options Maximize
Efficiency (MAX16821B/MAX16821C)
Thermal Shutdown
Nonlatching Output Overvoltage Protection
Low-Side Buck Mode with or without
Synchronous Rectification
High-Side Buck and Low-Side Boost Mode with or
without Synchronous Rectification
125kHz to 1.5MHz Programmable/Synchronizable
Switching Frequency
Integrated 4A Gate Drivers
Clock Output for 180° Out-of-Phase Operation for
Second Driver
-40°C to +125°C Operating Temperature Range
Ordering Information
The MAX16821A/MAX16821B/MAX16821C feature a
clock output with 180° phase delay to control a second
PART
TEMP RANGE
PIN-
PACKAGE
out-of-phase LED driver to reduce input and output fil-
ter capacitor size and to minimize ripple currents. The
wide switching frequency range (125kHz to 1.5MHz)
allows the use of small inductors and capacitors.
MAX16821A ATI+
MAX16821B ATI+
MAX16821C ATI+
-40°C to +125°C 28 TQFN-EP*
-40°C to +125°C 28 TQFN-EP*
-40°C to +125°C 28 TQFN-EP*
Additional features include programmable overvoltage
protection and an output enable function.
Applications
Front Projectors/Rear Projection TVs
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Simplified Diagram
7V TO 28V
C1
Portable and Pocket Projectors
Automotive Exterior Lighting
LCD TVs and Display Backlight
EN
I.C.
IN
DH
Q1
L1
V LED
Automotive Emergency Lighting and Signage
MAX16821
DL
Q2
C2
Q3
HIGH-FREQUENCY
OVI
CLP
CSP
PGND
R1
.
Typical Operating Circuit and Selector Guide appear at end
of data sheet.
PULSE TRAIN
________________________________________________________________ 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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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16821EVKIT+ | 制造商:Maxim Integrated Products 功能描述:HIGH-POWER SYNCHRONOUS HBLED DRIVER - Boxed Product (Development Kits) |
| MAX16822AASA/V+ | 功能描述:LED照明驱动器 2MHz HB w/MOSFET & HSide Crnt Sense 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 |
| MAX16822AASA/V+T | 功能描述:LED照明驱动器 2MHz HB w/MOSFET & HSide Crnt Sense 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 |
| MAX16822AASA+ | 功能描述:LED照明驱动器 2MHz HB w/MOSFET & HSide Crnt Sense 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 |
| MAX16822AASA+T | 功能描述:LED照明驱动器 2MHz HB w/MOSFET & HSide Crnt Sense 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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