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UCC3973NG4 PDF预览

UCC3973NG4

更新时间： 2024-11-08 15:55:55
品牌 Logo 应用领域
德州仪器 - TI 信息通信管理开关光电二极管
页数 文件大小 规格书
24页 914K
描述
FLUORESCENT LIGHT CONTROLLER, 160kHz SWITCHING FREQ-MAX, PDIP8, GREEN, PLASTIC, DIP-8

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UCC3973NG4 技术参数

是否Rohs认证： 符合生命周期：Obsolete
零件包装代码：DIP包装说明：DIP, DIP8,.3
针数：8Reach Compliance Code：unknown
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.75模拟集成电路 - 其他类型：FLUORESCENT LIGHT CONTROLLER
控制模式：CURRENT-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：25 V最小输入电压：4.5 V
标称输入电压：12 VJESD-30 代码：R-PDIP-T8
长度：9.81 mm功能数量：1
端子数量：8最高工作温度：70 °C
最低工作温度：封装主体材料：PLASTIC/EPOXY
封装代码：DIP封装等效代码：DIP8,.3
封装形状：RECTANGULAR封装形式：IN-LINE
峰值回流温度（摄氏度）：NOT SPECIFIED电源：12 V
认证状态：Not Qualified座面最大高度：5.08 mm
子类别：Switching Regulator or Controllers标称供电电压 (Vsup)：12 V
表面贴装：NO切换器配置：CURRENT FED PUSH-PULL
最大切换频率：160 kHz技术：BICMOS
温度等级：COMMERCIAL端子形式：THROUGH-HOLE
端子节距：2.54 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：7.62 mm
Base Number Matches：1

UCC3973NG4 数据手册

 浏览型号UCC3973NG4的Datasheet PDF文件第2页浏览型号UCC3973NG4的Datasheet PDF文件第3页浏览型号UCC3973NG4的Datasheet PDF文件第4页浏览型号UCC3973NG4的Datasheet PDF文件第5页浏览型号UCC3973NG4的Datasheet PDF文件第6页浏览型号UCC3973NG4的Datasheet PDF文件第7页 
UCC1972/3  
UCC2972/3  
UCC3972/3  
BiCMOS Cold Cathode Fluorescent Lamp Driver Controller  
FEATURES  
DESCRIPTION  
• 1mA Typical Supply Current  
Design goals for a Cold Cathode Fluorescent Lamp (CCFL) converter used  
in a notebook computer or portable application include small size, high effi-  
ciency, and low cost. The UCC3972/3 CCFL controllers provide the neces-  
sary circuit blocks to implement a highly efficient CCFL backlight power  
supply in a small footprint 8 pin TSSOP package. The BiCMOS controllers  
typically consume less than 1mA of operating current, improving overall  
system efficiency when compared to bipolar controllers requiring 5mA to  
10mA of operating current.  
• Accurate Lamp Current Control  
• Analog or Low Frequency Dimming  
Capability  
• Open Lamp Protection  
• Programmable Startup Delay  
• 4.5V to 25V Operation  
External parts count is minimized and system cost is reduced by integrating  
such features as a feedback controlled PWM driver stage, open lamp pro-  
tection, startup delay and synchronization circuitry between the buck and  
push-pull stages. The UCC3972/3 include an internal shunt regulator, al-  
lowing the part to operate with input voltages from 4.5V up to 25V. The part  
supports both analog and externally generated low frequency dimming  
modes of operation.  
• PWM Frequency Synchronized to  
External Resonant Tank  
• 8 Pin TSSOP and SOIC Packages  
Available  
• Internal Voltage Clamp Protects  
Transformer from Over-voltage  
(UCC3973)  
The UCC3973 adds a programmable voltage clamp at the BUCK pin. This  
feature can be used to protect the transformer from overvoltage during  
startup or when an open lamp occurs. Transformer voltage is controlled by  
reducing duty cycle when an over-voltage is detected.  
TYPICAL APPLICATION CIRCUIT  
C6 27pF  
UCC3972 NO INTERNAL VOLTAGE CLAMP  
INTERNAL VOLTAGE CLAMP LIMITS TRANS FORMER  
VOLTAGE AT S TART-UP OR DURING FAULT  
T1  
UCC3973  
S YS TEM VOLTAGE  
(4.5V TO 25V)  
R2 1k  
C5 0.1µF  
R1  
1kΩ  
UCC3972/3  
VDD  
D1  
R10  
8
C1  
6.8µF  
Q2  
VBAT  
2
1
C2  
1µF  
LAMP  
HV  
C7  
0.1µF  
Q3  
R11  
6
5
3
GND  
MODE  
COMP  
L1  
68µH  
LAMP  
LV  
BUCK  
ANALOG  
DIMMING  
C3  
1µF  
R6 75Ω  
OUT  
FB  
7
4
R5 10k  
R3 68k  
LOW FREQUENCY DIMMING  
68k  
D2  
R4 750  
C4 33nF  
D
R
LFD  
LFD  
0V-5V LOW FREQUENCY CONTROL SIGNAL  
UDG-99154  
SLUS252C - OCTOBER 1998 - REVISED MARCH 2005  
1234567...24

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