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参数资料
| 型号： | MAX16806EVCMAXQU+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/19页 |
| 文件大小： | 0K |
| 描述： | EVAL KIT FOR MAX16806 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 电流 - 输出 / 通道： | 350mA |
| 输出及类型： | 1，非隔离 |
| 特点： | 可调光，5V 额外输出 |
| 输入电压： | 5.5 ~ 40 V |
| 已供物品： | 2 个板，线缆，CD |
| 已用 IC / 零件： | MAX16806 |
EEPROM-Programmable, High-Voltage, 350mA
LED Drivers with LED Current Foldback
SDA
t BUF
t HD:STA
t SP
SCL
t LOW
t R
t F
t HD:STA
t HIGH
t SU:STA
t SU:STO
P
STOP
START
t HD:DAT
t SU:DAT
REPEATED
START
Figure 1. I 2 C Serial Interface Timing Diagram
Detailed Description
The MAX16805/MAX16806 are constant-current regu-
lators that provide up to 350mA of current to one or
more strings of high-brightness LEDs. A wide operat-
ing input voltage range of 5.5V to 40V makes the
devices ideal for automotive applications. The
MAX16805/MAX16806 feature the I 2 C interface that
allows communication with the internal dynamic regis-
ters and EEPROM.
Dynamic registers control the MAX16805/MAX16806
functions and can be updated in real time through the
I 2 C interface. See Table 2 for register addresses. Turning
off the input voltage clears the dynamic register contents.
To save settings, store them into the EEPROM. The
MAX16805/MAX16806 load the stored settings into the
dynamic registers at power-up. In addition, during nor-
mal operation a write command to the EEPROM Content
Transfer register loads the stored settings into the
dynamic register. Information stored can be transferred
into dynamic registers after issuing a “write” command to
the EEPROM Content Transfer register.
The MAX16805/MAX16806’s 5V regulator (V5) provides
up to 2mA of current to external circuitry. However, the
MAX16806’s 5V regulator can deliver 2mA of output cur-
rent only when the momentary switch is not used. When
the momentary switch is active, the MAX16806 achieves
up to 0.5mA of current. In addition, the
MAX16805/MAX16806 feature thermal and output short-
circuit protection. The wide operating voltage range
helps protect the device against large transients up to
45V such as those found in load dump situations.
The MAX16805/MAX16806 use a feedback loop to
control the output current. The differential voltage
across the sense resistor is compared to a fixed refer-
ence voltage and the error is amplified to serve as the
drive to the internal pass device, see the Functional
Diagram. The MAX16805/MAX16806 offer a program-
mable LED current reference using the Binning
Adjustment register.
These devices are current controllers internally opti-
mized for driving the impedance range expected from
1 to 10 (or more) high-brightness LEDs.
Dimming Input (DIM)
The MAX16805/MAX16806’s dimming input operates
with either an analog or PWM control signal. If the
pulse detector detects three edges of a PWM signal
with a frequency range between 80Hz to 2kHz, the
MAX16805/MAX16806 synchronize to external PWM
input signal and pulse-width-modulate the LED current.
If an analog control signal is applied to DIM, the
MAX16805/MAX16806 compare the DC input to an
internally generated 200Hz ramp to pulse-width-modu-
late the LED current. The maximum peak value of the
200Hz ramp can be programmed using the Ramp
Peak register. This allows the LED current to be adjust-
ed through the I 2 C interface from 50% (typ) to 100% in
real time when V DIM is 1.54V.
The output current duty cycle is adjustable from 0% to
100% (0.21V < V DIM < 3.1V).
Use the following formula to calculate the output cur-
rent duty cycle:
Duty cycle = (V DIM - 0.21V) / V RAMP
10
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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: |
| MAX16807AUI+ | 功能描述:LED照明驱动器 8Ch w/Switch-Mode Boost & SEPIC Ctlr 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 |
| MAX16807AUI+T | 功能描述:LED照明驱动器 8Ch w/Switch-Mode Boost & SEPIC Ctlr 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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