UC3871DW

更新时间： 2024-01-07 03:50:22

品牌	Logo	应用领域
德州仪器 - TI		驱动器稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管
页数	文件大小	规格书
14页	1014K
描述
Resonant Fluorescent Lamp Driver

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UC3871DW 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Obsolete	零件包装代码：	QLCC
包装说明：	GREEN, PLASTIC, LCC-20	针数：	20
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.65
Is Samacsys：	N	模拟集成电路 - 其他类型：	FLUORESCENT LIGHT CONTROLLER
控制模式：	CURRENT-MODE	控制技术：	RESONANT CONTROL
最大输入电压：	20 V	最小输入电压：	4.5 V
标称输入电压：	5 V	JESD-30 代码：	S-PQCC-J20
长度：	8.965 mm	功能数量：	1
端子数量：	20	最高工作温度：	70 °C
最低工作温度：		最大输出电流：	0.1 A
封装主体材料：	PLASTIC/EPOXY	封装代码：	QCCJ
封装等效代码：	LDCC20,.4SQ	封装形状：	SQUARE
封装形式：	CHIP CARRIER	峰值回流温度（摄氏度）：	NOT SPECIFIED
认证状态：	Not Qualified	座面最大高度：	4.57 mm
子类别：	Switching Regulator or Controllers	表面贴装：	YES
切换器配置：	PUSH-PULL	最大切换频率：	78 kHz
技术：	BIPOLAR	温度等级：	COMMERCIAL
端子形式：	J BEND	端子节距：	1.27 mm
端子位置：	QUAD	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	8.965 mm	Base Number Matches：	1

UC1871

UC2871

UC3871

APPLICATION INFORMATION (cont.)

UC3871 Oscillator Section

Figure 2

A unique protection feature incorporated in the UC3871

is the Open Lamp Detect circuit. An open lamp interrupts

the current feedback loop and causes very high secon-

dary voltage. Operation in this mode will usually break-

down the transformer’s insulation, causing permanent

damage to the converter. The open lamp detect circuit,

shown in Figure 3 senses the lamp current feedback sig-

nal at the error amplifiers input, and shuts down the out-

puts if insufficient signal is present. Soft-start circuitry

limits initial turn-on currents and blanks the open lamp

detect signal.

requirements. A logic level enable pin shuts down the IC,

allowing direct connection to the battery. During shut-

down, the IC typically draws less than 1µA. The UC3871,

operating from 4.5V to 20V, is compatible with almost all

battery voltages used in portable computers. Under-volt-

age lockout circuitry disables operation until sufficient

supply voltage is available, and a 1% voltage reference

insures accurate operation. Both inputs to the LCD sup-

ply error amplifier are uncommitted, allowing positive or

negative supply loop closure without additional circuitry.

The LCD supply modulator also incorporates cycle-by-

cycle current limiting for added protection.

Other features are included to minimize external circuitry

UC1871 Open Lamp Detect Circuitry

Figure 3

UNITRODE INTEGRATED CIRCUITS

7 CONTINENTAL BLVD. • MERRIMACK, NH 03054

TEL. (603) 424-2410 • FAX (603) 424-3460

1 2 3 456 7 8...14

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型号	品牌	描述	获取价格	数据表
UC3871DWG4	TI	Resonant Fluorescent Lamp Driver	获取价格
UC3871DWTR	TI	Resonant Fluorescent Lamp Driver	获取价格
UC3871DWTRG4	TI	Resonant Fluorescent Lamp Driver	获取价格
UC3871J	ETC	Industrial Control IC	获取价格
UC3871N	TI	Resonant Fluorescent Lamp Driver	获取价格
UC3871NG4	TI	Resonant Fluorescent Lamp Driver	获取价格