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MAX8709BETI

更新时间: 2024-11-01 03:14:59
品牌 Logo 应用领域
美信 - MAXIM 稳压器开关式稳压器或控制器电源电路开关式控制器信息通信管理
页数 文件大小 规格书
24页 990K
描述
High-Efficiency CCFL Backlight Controller with SMBus Interface

MAX8709BETI 技术参数

生命周期:Active零件包装代码:QFN
包装说明:5 X 5 MM, 0.80 MM, MO-220WHHD-1, TQFN-28针数:28
Reach Compliance Code:unknownECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.73
Is Samacsys:N其他特性:RESONANT MODE ALSO AVAILABLE
模拟集成电路 - 其他类型:FLUORESCENT LIGHT CONTROLLER控制技术:PULSE WIDTH MODULATION
最大输入电压:28 V最小输入电压:4.6 V
标称输入电压:12 VJESD-30 代码:S-XQCC-N28
JESD-609代码:e0长度:5 mm
功能数量:1端子数量:28
最高工作温度:85 °C最低工作温度:-40 °C
最大输出电流:0.5 A封装主体材料:UNSPECIFIED
封装代码:HVQCCN封装形状:SQUARE
封装形式:CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE认证状态:Not Qualified
座面最大高度:0.8 mm表面贴装:YES
切换器配置:PUSH-PULL技术:BICMOS
温度等级:INDUSTRIAL端子面层:TIN LEAD
端子形式:NO LEAD端子节距:0.5 mm
端子位置:QUAD宽度:5 mm
Base Number Matches:1

MAX8709BETI 数据手册

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19-0768; Rev 0; 3/07  
High-Efficiency CCFL Backlight  
Controller with SMBus Interface  
General Description  
Features  
Synchronized to Resonant Frequency  
The MAX8709B integrated backlight controller is  
optimized to drive cold-cathode fluorescent lamps  
(CCFLs) using a resonant full-bridge inverter architecture.  
The resonant operation maximizes striking capability and  
provides near-sinusoidal waveforms over the entire input  
range to improve CCFL lifetime. The controller operates  
over a wide input voltage range of 4.6V to 28V with high  
power-to-light efficiency. The device also includes safety  
features that effectively protect against many single-point  
fault conditions including lamp-out and short-circuit faults.  
Longer Lamp Life  
Guaranteed Striking Capability  
High Power-to-Light Efficiency  
Wide Input Voltage Range (4.6V to 28V)  
Feed Forward for Excellent Line Rejection  
SMBus Dimming Control Interface  
10:1 Dimming Range  
The MAX8709B achieves 10:1 dimming range by “chop-  
ping” the lamp current on and off using a digital pulse-  
width-modulation (DPWM) method. The minimum DPWM  
duty cycle of the MAX8709B is 12.5%. The brightness is  
controlled with a 2-wire SMBus™-compatible interface.  
The device directly drives the four external N-channel  
power MOSFETs of the full-bridge inverter. An internal  
5.3V linear regulator powers the MOSFET drivers, the  
DPWM oscillator, and most of the internal circuitry. The  
MAX8709B is available in a space-saving 28-pin  
thin QFN package and operates over a -40°C to +85°C  
temperature range.  
Guaranteed 200Hz to 220Hz DPWM Frequency  
Secondary Voltage Limit Reduces Transformer  
Stress  
Adjustable Lamp-Out Protection with 1s Timer  
Secondary Current Limit Protects Against High-  
Voltage Short Circuits to Ground  
Small, 5mm x 5mm, Thin QFN Package  
Ordering Information  
PART  
TEMP RANGE PIN-PACKAGE  
Applications  
MAX8709BETI  
-40°C to +85°C 28 Thin QFN 5mm x 5mm  
Notebook Computer Displays  
LCD Monitors  
LCD TVs  
Automotive Displays  
Pin Configuration appears at end of data sheet.  
SMBus is a trademark of Intel Corp.  
Minimal Operating Circuit  
V
IN  
BATT  
GND  
V
V
CC  
DD  
BST2  
BST1  
GH1  
LOT  
REF  
MAX8709B  
LX1  
LX2  
GL1  
ILIM  
CCV  
CCI  
PGND  
GL2  
GH2  
VFB  
SUS  
SDA  
SCL  
ISEC  
IFB  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at  
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  

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