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参数资料
| 型号： | MAX16819ATT+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 6/10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 |
2MHz High-Brightness LED Drivers with
High-Side Current Sense and 5000:1 Dimming
Pin Description
PIN
1
2
3
4
5
6
EP
NAME
IN
CSN
DIM
GND
DRV
V CC
—
FUNCTION
Positive Supply Voltage Input. Bypass with a 1μF or higher value capacitor to GND.
Current-Sense Input
Logic-Level Dimming Input. Drive DIM low to turn off the current regulator. Drive DIM high to enable
the current regulator.
Ground
Gate Drive Output. Connect to the gate of an external n-channel MOSFET.
Voltage Regulator Output. Connect a 1μF capacitor from V CC to GND.
Exposed Paddle. Connect to a large-area ground plane for improved power dissipation. Do not use
as the only ground connection for the device.
Functional Diagram
IN
REGULATOR
-
+
CS
V CC
CSN
BANDGAP
REF
COMPARATOR
1.23V
+
-
GATE
DRIVER
DRV
UVLO
COMPARATOR
GND
DIM
DIM
BUFFER
MAX16819
MAX16820
Detailed Description
The MAX16819/MAX16820 are step-down, constant-
current, high-brightness LED (HB LED) drivers. These
devices operate from a 4.5V to 28V input voltage range
and provide up to 0.5A of source and 1A of sink drive
capability to the gate of an external MOSFET. A high-
side current-sense resistor sets the output current and
a dedicated PWM dimming input (DIM) allows for a
wide range of independent pulsed dimming.
The high-side current-sensing scheme and on-board
current-setting circuitry minimize the number of exter-
nal components while delivering LED current with a
±5% accuracy, using a 1% sense resistor. See the
Functional Diagram.
6
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