参数资料
| 型号： | DS3992Z-09N+T&R |
| 厂商： | Maxim Integrated |
| 文件页数： | 7/13页 |
| 文件大小： | 0K |
| 描述： | IC CCFL CNTRLR 2CH 16-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | CCFL 控制器 |
| 频率： | 40 ~ 80 kHz |
| 电流 - 电源： | 8mA |
| 电源电压： | 4.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 包装： | 带卷 (TR) |
Two-Channel, Push-Pull CCFL Controller
Functional Diagrams (continued)
LAMP OUT
CHANNEL ENABLE
400mV
CHANNEL FAULT
LAMP OVERCURRENT
2.0V
LCMn
LAMP CURRENT MONITOR
64 LAMP CYCLE
DIMMING PWM SIGNAL
DIGITAL
CCFL
CONTROLLER
LAMP STRIKE AND REGULATION
OVERVOLTAGE
1.0V
512 x LAMP FREQUENCY
[20.48MHz TO 40.96MHz]
LAMP FREQUENCY
[40kHz TO 80kHz]
INTEGRATOR
LAMP MAXIMUM VOLTAGE REGULATION
1.0V
GATE
DRIVERS
OVDn
OVERVOLTAGE DETECTOR
GAn MOSFET
GATE
GBn DRIVERS
Figure 2. DS3992 Per Channel Logic Diagram
Detailed Description
Each DS3992 channel drives two logic-level n-channel
MOSFETs that are connected between the ends of
a step-up transformer and ground (See the Typical
Operating Circuits). The transformer has a center tap
on the primary side that is connected to the DC inverter
voltage supply. The DS3992 alternately turns on the two
MOSFETs to create the high-voltage AC waveform on
the secondary side. By varying the duration of the
MOSFET turn-on times, the DS3992 is able to accurate-
ly control the CCFL current.
A resistor in series with the CCFL’s ground connection
enables current monitoring. The voltage across this
resistor is fed to the lamp current monitor (LCM) input
and compared to an internal reference voltage to deter-
mine the duty cycle for the MOSFET gates.
The DS3992 supports a 1 lamp per channel configura-
tion with fully independent lamp control and minimal
external components. The DS3992 is also capable of
controlling more than 1 lamp per channel using a
wired-OR feedback circuit. See the Typical Operating
Circuits section for more information.
Block diagrams of the DS3992 are shown in Figures 1
and 2. More operating details of the DS3992 are dis-
cussed on the following pages of this data sheet.
Dimming Control
The DS3992 uses “burst” dimming to control the lamp
brightness. An analog voltage applied at the BRIGHT
input pin determines the duty cycle of a digital pulse-
width-modulated (DPWM) signal (90Hz to 220Hz for
DS3992Z-09P/DS3992Z-09N and 180Hz to 440Hz for
DS3992Z-18P/DS3992Z-18N). During the high period of
the DPWM cycle, the lamp is driven at the selected
lamp frequency (40kHz to 80kHz) as shown in Figure 3.
This part of the cycle is also called the “burst” period
because of the lamp frequency burst that occurs
DPWM SIGNAL
90Hz TO 220Hz
OR
180Hz TO 440Hz
LAMP CURRENT
Figure 3. Digital-PWM Dimming and Soft-Start
_____________________________________________________________________
7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS3992Z-09P | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Two-Channel, Push-Pull CCFL Controller |
| DS3992Z-09P+ | 功能描述:显示驱动器和控制器 2Ch Push-Pull CCFL 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 |
| DS3992Z-09P+R | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Two-Channel, Push-Pull CCFL Controller |
| DS3992Z-09P+T | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Two-Channel, Push-Pull CCFL Controller |
| DS3992Z-09P+T&R | 制造商:Maxim Integrated Products 功能描述: 制造商:Maxim Integrated Products 功能描述:CCFL DRVR 5.5V 16SOIC - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC CCFL CNTRLR 2CH 16-SOIC |
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