参数资料
| 型号： | MAX8722CEEG+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 1/21页 |
| 文件大小： | 0K |
| 描述： | IC CCFL BACKLIGHT CTRL 24-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 类型： | CCFL 控制器 |
| 频率： | 30 ~ 80 kHz |
| 电流 - 电源： | 1mA |
| 电流 - 输出： | 300mA |
| 电源电压： | 4.6 V ~ 28 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 24-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 24-QSOP |
| 包装： | 管件 |
19-3321; Rev 3; 2/09
ATION
EVALU
AVAILA
KIT
BLE
Low-Cost CCFL Backlight Controller
General Description
The MAX8722C integrated backlight controller is opti-
mized to drive cold-cathode fluorescent lamps (CCFLs)
using a full-bridge resonant inverter architecture.
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 (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.
The MAX8722C achieves 10:1 dimming range by “chop-
ping” the lamp current on and off using a digital pulse-
width modulation (DPWM) method. The DPWM frequency
can be accurately adjusted with a resistor or synchro-
nized to an external signal. The brightness is controlled
by an analog voltage on the CNTL pin. The device direct-
ly drives the four external n-channel power MOSFETs of
the full-bridge inverter. An internal 5.4V linear regulator
powers the MOSFET drivers, the DPWM oscillator, and
most of the internal circuitry. The MAX8722C is available
in a low-cost, 24-pin QSOP package and operates over a
Features
o Synchronized to Resonant Frequency
Longer Lamp Life
Guaranteed Striking Capability
High Power to Light Efficiency
o Wide Input Voltage Range (4.6V to 28V)
o Input-Voltage Feed-Forward for Excellent Line
Rejection
o Accurate Dimming Control with Analog Interface
o 10:1 Dimming Range
o Adjustable Accurate DPWM Frequency with Sync
Function
o Adjustable Lamp Current Rise and Fall Time
o Secondary Voltage Limit Reduces Transformer
Stress
o Lamp-Out Protection with Adjustable Timeout
o Secondary Overcurrent Protection with
Adjustable Timeout
o Low-Cost, 24-Pin QSOP Package
-40°C to +85°C temperature range.
Applications
Ordering Information
Notebook Computer Displays
LCD Monitors
PART
MAX8722CEEG
TEMP RANGE
-40 ° C to +85 ° C
PIN-PACKAGE
24 QSOP
PKG
CODE
E24-1
LCD TVs
Pin Configuration
Minimal Operating Circuit
TOP VIEW
BATT 1
SHDN 2
24 GND
23 V CC
V IN
BATT
V DD
V CC
GND
ILIM 3
TFLT 4
22 V DD
21 PGND
V CC
V CC
BST2
BST1
CNTL 5
DPWM 6
MAX8722C
20 GL2
19 GL1
ILIM
GH1
MAX8722C LX1
SYNC 7
FREQ 8
COMP 9
IFB 10
VFB 11
ISEC 12
18 GH1
17 LX1
16 BST1
15 BST2
14 LX2
13 GH2
FREQ
SHDN
CNTL
SYNC
DPWM
COMP
TFLT
LX2
GL1
PGND
GL2
GH2
VFB
ISEC
IFB
QSOP
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1
相关PDF资料 |
PDF描述 |
|---|---|
| MAX8723ETE+T | IC REG FOR LCD DISPLAY 16-TQFN |
| MAX8725ETI+T | IC CHARGER BATTERY 28-TQFN |
| MAX8727ETB+TG104 | IC DC/DC CONV TFT-LCD 10-TDFN |
| MAX8730ETI+T | IC CHARGER BATTERY 28-TQFN |
| MAX8731AETI+ | IC SMBUS LVL2 BATT CHRGR 28TQFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8722CEEG+ | 功能描述:显示驱动器和控制器 CCFL Backlight Controller RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
| MAX8722CEEG+T | 功能描述:显示驱动器和控制器 CCFL Backlight Controller RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
| MAX8722EEG | 功能描述:显示驱动器和控制器 RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
| MAX8722EEG+ | 功能描述:显示驱动器和控制器 CCFL Backlight Controller RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
| MAX8722EEG+T | 功能描述:显示驱动器和控制器 CCFL Backlight Controller RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。