参数资料
型号: MAX16804ATP+T
厂商: Maxim Integrated
文件页数: 8/10页
文件大小: 0K
描述: IC LED DRIVR HIGH BRIGHT 20-TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
拓扑: PWM
输出数: 1
内部驱动器:
类型 - 主要: 车载
类型 - 次要: 高亮度 LED(HBLED)
电源电压: 5.5 V ~ 40 V
输出电压: 5.1V
安装类型: 表面贴装
封装/外壳: 20-WQFN 裸露焊盘
供应商设备封装: 20-TQFN-EP(5x5)
包装: 带卷 (TR)
工作温度: -40°C ~ 125°C
High-Voltage, 350mA LED Driver with
Analog and PWM Dimming Control
LED Current Thermal Foldback
With a minimum number of external components, the
MAX16804 provides LED current thermal foldback
using a negative temperature coefficient (NTC) thermis-
tor. Figure 3 shows a thermistor connected to V5 and
the CS+ of the MAX16804. As the temperature increas-
es, the voltage drop across R2 increases causing the
LED current to decrease.
I LED = [V SENSE - [R2/(R2 + RT)] x V5]/R1 (4)
Other Applications
Figure 4 shows an application circuit with the
MAX16804 using a single BJT to provide high output
current. For proper operation:
V IN(MIN) > V CESAT(MAX) + V FT(MAX) + V RSENSE (5)
where V CESAT(MAX) is the maximum saturation voltage
of the external BJT.
V IN
C1
IN
OUT
PWM DIMMING
EN
DIM
GND
MAX16804
V5
CS+
CS-
C2
RT
R2
LEDs
R1
Figure 3. LED Current Thermal Foldback Operation with an NTC Thermistor
LEDs
V IN
IN
OUT
Q1
C1
EN
V5
C2
MAX16804
PWM DIMMING
DIM
GND
Figure 4. Increased Output Current (Ampere Range) with a Single BJT
CS+
CS-
R SENSE
8
_______________________________________________________________________________________
相关PDF资料
PDF描述
MAX16812ATI/V+ IC LED DRIVR HIGH BRIGHT 28-TQFN
MAX16814AUP+T IC LED DVR HI-BRIGHT 4CH 20TSSOP
MAX16821CATI+T IC LED DRIVR HIGH BRIGHT 28-TQFN
MAX16822AASA/V+ IC LED DRIVER HIGH BRIGHT 8SOIC
MAX16826ATJ+C24 IC LED DVR HB PROGR 32-HQFN
相关代理商/技术参数
参数描述
MAX16805ATP+ 功能描述:LED照明驱动器 EEPROM-Prog 350mA w/Current Foldback 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
MAX16805ATP+T 功能描述:LED照明驱动器 EEPROM-Prog 350mA w/Current Foldback 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
MAX16806ATP+ 功能描述:LED照明驱动器 EEPROM-Prog 350mA w/Current Foldback 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
MAX16806ATP+T 功能描述:LED照明驱动器 EEPROM-Prog 350mA w/Current Foldback 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
MAX16806EVCMAXQU+ 功能描述:LED 照明开发工具 RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: