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参数资料
| 型号： | MAX16805ATP+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 11/19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 |
| 恒定电流： | 是 |
| 拓扑： | PWM |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 车载 |
| 类型 - 次要： | 高亮度 LED（HBLED） |
| 频率： | 400kHz |
| 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 |
EEPROM-Programmable, High-Voltage, 350mA
LED Drivers with LED Current Foldback
The dimming feature can be used for LED brightness
adjustment (see the Typical Operating Circuits) and
theater dimming. If the external PWM signal is used,
theater dimming can be achieved by varying the PWM
V IN
IN
OUT
duty cycle. Figure 2 shows a simple circuit that imple-
ments theater dimming with a DC input signal.
Thermal Sensor Inputs/I 2 C Interface
(TFP/SCL and TFN/SDA)
The MAX16806 features dual-function inputs, TFP/SCL
and TFN/SDA. In programming mode, TFP/SCL and
TFN/SDA serve as the I 2 C serial communication inter-
THEATER
DIMMING
SIGNAL
EN
MAX16805
MAX16806
V5
CS+
+5V REG
0.1 μ F
LEDs
face. TFP/SCL and TFN/SDA also serve as inputs for
analog signals generated by an external temperature
R SENSE
sensor such as the MAX6613. When the thermal sensor
is not used, connect TFP/SCL and TFN/SDA through
50k Ω resistors to V5 and GND, respectively.
The MAX16805 does not offer dual-function inputs. SCL
and SDA are used only to communicate with the
MAX16805 through the I 2 C interface.
DIM
GND
CS-
Momentary Switch Interface (SW)
The MAX16806 offers a momentary switch (SW) that
overrides the analog dimming signal by latching the
output current to 100% duty cycle. The MAX16806
does not override external PWM signal at DIM or dim-
ming caused by thermal or LED current foldback. To
latch the output current into a 100% duty cycle, press
SW once. To restore the initial duty cycle determined
by the DC level at DIM, press SW again. The
MAX16806 provides a minimum of 1mA of wetting cur-
Figure 2. Theater Dimming Light
SDA
SCL
rent to the momentary switch.
Overtemperature Protection
The MAX16805/MAX16806 enter a thermal shutdown in
the event of overheating. This typically occurs in over-
S
START
CONDITION
P
STOP
CONDITION
load or output short-circuit conditions. When the junc-
tion temperature exceeds T J = +155°C (typ), the
internal thermal protection circuitry turns off the pass
device. The MAX16805/MAX16806 recover from ther-
mal shutdown once the junction temperature drops by
+23°C (typ). This feature allows self-protection by ther-
mally cycling in the event of a short-circuit or overload
condition.
Digital Interface
The MAX16805/MAX16806 feature an I 2 C, 2-wire serial
interface consisting of a bidirectional serial data line
(SDA) and a serial clock line (SCL). SDA and SCL facili-
tate bidirectional communication between the
MAX16805/MAX16806 and the master device at rates
Figure 3. I 2 C Communication Start and Stop Conditions
up to 400kHz. The master (typically a microcontroller)
initiates data transfer on the bus and generates SCL.
Start and Stop Conditions
Both SCL and SDA remain high when the interface is
not busy. A master controller signals the beginning of a
transmission with a START condition by transitioning
SDA from high to low while SCL is high. The master
controller issues a STOP condition by transitioning the
SDA from low to high while SCL is high, when it finishes
communicating with the slave. The bus is then free for
another transmission ( Figure 3).
______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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: |
| MAX16806EVKIT+ | 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: |
| MAX16806EVMAXQUSB+ | 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: |
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