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| 型号： | MAX16819ATT+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 1/10页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER HIGH BRIGHT 6-TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 恒定电流： | 是 |
| 拓扑： | PWM，降压（降压） |
| 输出数： | 1 |
| 内部驱动器： | 无 |
| 类型 - 主要： | 车载 |
| 类型 - 次要： | 高亮度 LED（HBLED） |
| 频率： | 2MHz |
| 电源电压： | 4.5 V ~ 28 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-WDFN 裸露焊盘 |
| 供应商设备封装： | 6-TDFN 裸露焊盘（3x3） |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 125°C |
| 产品目录页面： | 1425 (CN2011-ZH PDF) |
| 其它名称： | MAX16819ATT+TDKR |
ATION
EVALU
AVAILA
19-0706; Rev 1; 3/07
KIT
B LE
2MHz High-Brightness LED Drivers with
High-Side Current Sense and 5000:1 Dimming
General Description
Features
The MAX16819/MAX16820, step-down constant-current
high-brightness LED (HB LED) drivers provide a cost-
effective solution for automotive interior/exterior lighting,
architectural and ambient lighting, LED bulbs such as
MR16 and other LED illumination applications.
The MAX16819/MAX16820 operate from a 4.5V to 28V
input voltage range and feature a 5V/10mA on-board
regulator. A high-side current-sense resistor adjusts the
output current and a dedicated PWM input (DIM)
enables a wide range of pulsed dimming.
The MAX16819/MAX16820 are well suited for applica-
tions requiring a wide input voltage range. The high-side
current-sensing and an integrated current-setting circuit-
ry minimize the number of external components while
delivering an LED current with ±5% accuracy. A hys-
teretic control algorithm ensures excellent input-supply
rejection and fast response during load transients and
PWM dimming. The MAX16819 features a 30% inductor
o
o
o
o
o
o
o
o
o
o
o
High-Side Current Sense
Dedicated Dimming Control Input
20kHz Maximum Dimming Frequency
Hysteretic Control: No Compensation
Up to 2MHz Switching Frequency
±5% LED Current Accuracy
Adjustable Constant LED Current
4.5V to 28V Input Voltage Range
Over 25W Output Power
5V, 10mA On-Board Regulator
-40°C to +125°C Operating Temperature Range
Ordering Information
current ripple and the MAX16820 features a 10% current
ripple. These devices operate up to 2MHz switching fre-
quency, thus allowing for small component size.
The MAX16819/MAX16820 operate over the -40°C to
PART
MAX16819 ATT+T
MAX16820 ATT+T
PIN-PACKAGE
6 TDFN–EP*
6 TDFN-EP*
PKG CODE
T633-2
T633-2
TOP
MARK
+ATB
+ATC
+125°C automotive temperature range and are avail-
able in 3mm x 3mm x 0.8mm, 6-pin TDFN packages.
Applications
Architectural, Industrial, and Ambient Lighting
Automotive RCL, DRL, and Fog Lights
MR16 and Other LED Bulbs
Note: All devices are specified over the -40°C to +125°C oper-
ating temperature range.
+Denotes lead-free package.
*EP = Exposed paddle.
Typical Operating Circuit
Indicators and Emergency Lighting
V IN
TOP VIEW
Pin Configuration
C IN
R SENSE
L
6
5
4
C VCC
MAX16819
MAX16820
IN
V CC
+
1
2
3
CSN
DIM
MAX16819
MAX16820
DRV
GND
TDFN
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
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