Datasheet > UCC2973N

UCC2973N

更新时间： 2024-11-24 20:55:39

品牌	Logo	应用领域
德州仪器 - TI		信息通信管理光电二极管
页数	文件大小	规格书
24页	890K
描述
FLUORESCENT LIGHT CONTROLLER, PDIP8, DIP-8

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中文翻译

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技术参数
数据手册

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UCC2973N 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
零件包装代码：	DIP	包装说明：	DIP, DIP8,.3
针数：	8	Reach Compliance Code：	not_compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.83	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 V	JESD-30 代码：	R-PDIP-T8
长度：	9.78 mm	功能数量：	1
端子数量：	8	最高工作温度：	85 °C
最低工作温度：	-40 °C	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：	5.33 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：	280 kHz	技术：	BICMOS
温度等级：	INDUSTRIAL	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

UCC2973N 数据手册

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

UCC3973

S YS TEM VOLTAGE

(4.5V TO 25V)

R2 1k

C5 0.1µF

1kΩ

UCC3972/3

VDD

R10

6.8µF

VBAT

1µF

LAMP

0.1µF

R11

GND

MODE

COMP

68µH

LAMP

BUCK

ANALOG

DIMMING

1µF

R6 75Ω

OUT

R5 10k

R3 68k

LOW FREQUENCY DIMMING

68k

R4 750

C4 33nF

LFD

0V-5V LOW FREQUENCY CONTROL SIGNAL

UDG-99154

SLUS252C - OCTOBER 1998 - REVISED MARCH 2005

12 3 4 5 6 7...24

中文翻译

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与UCC2973N相关器件

型号	品牌	获取价格	描述	数据表
UCC2973PW	TI	获取价格	BiCMOS Cold Cathode Fluorescent Lamp Driver Controller
UCC2973PWG4	TI	获取价格	BiCMOS Cold Cathode Fluorescent Lamp Driver Controller
UCC2973PWTR	TI	获取价格	BiCMOS Cold Cathode Fluorescent Lamp Driver Controller
UCC2973PWTRG4	TI	获取价格	BiCMOS Cold Cathode Fluorescent Lamp Driver Controller
UCC2974	TI	获取价格	DUAL COLD CATHODE FLUORESCENT LAMP CONTROLLER
UCC2974PW	TI	获取价格	FLUORESCENT LIGHT CONTROLLER, 60kHz SWITCHING FREQ-MAX, PDSO16, 5.10 X 6.60 MM, TSSOP-16
UCC2974PWR	TI	获取价格	FLUORESCENT LIGHT CONTROLLER, 60kHz SWITCHING FREQ-MAX, PDSO16, 5.10 X 6.60 MM, TSSOP-16
UCC2975	TI	获取价格	MULTI TOPOLOGY PIEZOELECTRIC TRANSFORMER CONTROLLER
UCC2975_15	TI	获取价格	MULTI-TOPOLOGY PIEZOELECTRIC TRANSFORMER CONTROLLER
UCC2975PW	TI	获取价格	MULTI TOPOLOGY PIEZOELECTRIC TRANSFORMER CONTROLLER

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