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参数资料
| 型号： | MAX16807AUI+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 14/19页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WT/RGB BCKLT 28TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 恒定电流： | 是 |
| 拓扑： | 开路漏极，PWM，降压（降压），SEPIC，升压（升压） |
| 输出数： | 8 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | RGB，白色 LED |
| 频率： | 20kHz ~ 1MHz |
| 电源电压： | 8 V ~ 26.5 V |
| 输出电压： | 36V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.173"，4.40mm 宽）裸露焊盘 |
| 供应商设备封装： | 28-TSSOP 裸露焊盘 |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 125°C |
| 产品目录页面： | 1424 (CN2011-ZH PDF) |
Integrated 8-Channel LED Driver with
Switch-Mode Boost and SEPIC Controller
The oscillator frequency is then:
f OSC =
(
1
t C + t D )
R CS =
V CS
I P ? P
I P-P is the peak current that flows through the MOSFET.
Reference Output
REF is a 5V reference output that can source 20mA.
Bypass REF to AGND with a 0.1μF capacitor.
Current Limit
The MAX16807 includes a fast current-limit comparator
to terminate the on cycle during an overload or a fault
condition. The current-sense resistor, R CS , connected
between the source of the external MOSFET and
AGND, sets the current limit. The CS input has a volt-
age trip level (V CS ) of 0.3V. Use the following equation
to calculate R CS :
When the voltage produced by this current (through the
current-sense resistor) exceeds the current-limit com-
parator threshold, the MOSFET driver (OUT) turns the
switch off within 60ns. In most cases, a small RC filter is
required to filter out the leading-edge spike on the sense
waveform. Set the time constant of the RC filter at 50ns.
Buck-Boost (SEPIC) Operation
Figure 2 shows a buck-boost application circuit using
the MAX16807 in a stand-alone mode of operation.
SEPIC topology is necessary when the total forward
voltage of the LEDs in a string is such that V OUT can be
below or above V IN .
V IN
L1
C1
D
V OUT
C OUT
Q
L2
R1
LEDs
R CS
C C1
C C2
R C1
R2
3V TO 5.5V
C IN
OUT CS AGND
V CC
V+
COMP
FB
C BYP
PGND
MAX16807
OUT0
OUT1
DIN
LE
OUT2
OUT3
OUT4
EXTERNAL
CLOCK INPUT
EXTERNAL
DIM INPUT
CLK
DOUT
OE
OUT5
OUT6
OUT7
R SET
SET
C REF
REF
R T
C T
RTCT
Figure 2. Buck-Boost (SEPIC) Configuration
14
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| MAX16807EVKIT+ | 功能描述:LED 照明开发工具 MAX16807 Eval Kit 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: |
| MAX16808AUI+ | 制造商:Maxim Integrated Products 功能描述:LED DRVR 3V TO 5.5V 28TSSOP EP - Rail/Tube |
| MAX16808AUI+T | 制造商:Maxim Integrated Products 功能描述:LED DRVR 3V TO 5.5V 28TSSOP EP - Tape and Reel |
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