UCC2889D

更新时间： 2024-09-20 12:02:03

品牌	Logo	应用领域
德州仪器 - TI		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信息通信管理 PC
页数	文件大小	规格书
14页	1119K
描述
Off-line Power Supply Controller

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中文翻译

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技术参数
数据手册
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UCC2889D 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	SOIC
包装说明：	SOIC-8	针数：	8
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	Factory Lead Time：	1 week
风险等级：	0.8	Samacsys Confidence：
Samacsys Status：	Released	Samacsys PartID：	608243
Samacsys Pin Count：	8	Samacsys Part Category：	Integrated Circuit
Samacsys Package Category：	Other	Samacsys Footprint Name：	SOIC127P600X175-8N
Samacsys Released Date：	2017-01-12 12:59:53	Is Samacsys：	N
模拟集成电路 - 其他类型：	SWITCHING CONTROLLER	控制模式：	VOLTAGE-MODE
最大输入电压：	9.3 V	最小输入电压：	6.6 V
标称输入电压：	9 V	JESD-30 代码：	R-PDSO-G8
JESD-609代码：	e4	长度：	4.9 mm
湿度敏感等级：	2	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	最大输出电流：	0.2 A
标称输出电压：	12 V	封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP	封装等效代码：	SOP8,.25
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE
峰值回流温度（摄氏度）：	260	认证状态：	Not Qualified
座面最大高度：	1.75 mm	子类别：	Switching Regulator or Controllers
表面贴装：	YES	切换器配置：	SINGLE
最大切换频率：	100 kHz	技术：	BICMOS
温度等级：	INDUSTRIAL	端子面层：	Nickel/Palladium/Gold (Ni/Pd/Au)
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	3.9 mm	Base Number Matches：	1

UCC2889D 数据手册

UCC1889

UCC2889

UCC3889

Off-line Power Supply Controller

DESCRIPTION

FEATURES

•

Transformerless Off-line

Applications

The UCC1889 controller is optimized for use as an off-line, low power, low voltage,

regulated bias supply. The unique circuit topology utilized in this device can be

visualized as two cascaded flyback converters, each operating in the discontinu-

ous mode, and both driven from a single external power switch. The significant

benefit of this approach is the ability to achieve voltage conversion ratios of 400V

to 12V with no transformer and low internal losses.

•

Ideal Primary-side Bias Supply

Efficient BiCMOS Design

Wide Input Range

The control algorithm utilized by the UCC1889 is to force the switch on time to be

inversely proportional to the input line voltage while the switch off time is made in-

versely proportional to the output voltage. This action is automatically controlled by

an internal feedback loop and reference. The cascaded configuration allows a volt-

age conversion from 400V to 12V to be achieved with a switch duty cycle greater

than 10%. This topology also offers inherent short circuit protection since as the

output voltage falls to zero, the switch off time approaches infinity.

Fixed or Adjustable

Low Voltage Output

•

Uses Low Cost SMD Inductors

Short Circuit Protected

Optional Isolation Capability

The output voltage can be easily set to 12V or 18V. Moreover, it can be pro-

grammed for other output voltages less than 18V with a few additional compo-

nents. An isolated version can be achieved with this topology as described further

in Unitrode Application Note U-149.

OPERATION

With reference to the application diagram below, when input voltage is first applied,

the RON current into TON is directed to VCC where it charges the external capacitor,

C3, connected to VCC. As voltage builds on VCC, an internal undervoltage lockout

holds the circuit off and the output at DRIVE low until VCC reaches 8.4V. At this

time, DRIVE goes high turning on the power switch, Q1, and redirecting the current

into TON to the timing capacitor, CT. CT charges to a fixed threshold with a current

ICHG=0.8 • (VIN - 4.5V)/RON. Since DRIVE will only be high for as long as CT

charges, the power switch on time will be inversely proportional to line voltage.

This provides a constant line voltage-switch on time product.

TYPICAL APPLICATION

UDG-93060-1

Note: This device incorporates patented technology used under license from Lambda Electronics, Inc.

SLUS158A - FEBRUARY 1995 - REVISED FEBRUARY 2003

12 3 4 5 6 7...14

中文翻译

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UCC2889D 替代型号

型号	品牌	替代类型	描述	数据表
UCC2889DTR	TI	完全替代	Off-line Power Supply Controller
UCC2889DTRG4	TI	类似代替	Off-line Power Supply Controller
UCC2889DG4	TI	类似代替	Off-line Power Supply Controller

与UCC2889D相关器件

型号	品牌	获取价格	描述	数据表
UCC2889DG4	TI	获取价格	Off-line Power Supply Controller
UCC2889DTR	TI	获取价格	Off-line Power Supply Controller
UCC2889DTR/81361G4	TI	获取价格	Off-line Power Supply Controller
UCC2889DTRG4	TI	获取价格	Off-line Power Supply Controller
UCC2889J	ETC	获取价格	Voltage-Mode SMPS Controller
UCC2889N	TI	获取价格	Off-line Power Supply Controller
UCC2889NG4	TI	获取价格	Off-line Power Supply Controller
UCC2890	TI	获取价格	Off-Line Battery Charger Circuit
UCC2891	TI	获取价格	CURRENT MODE ACTIVE CLAMP PWM CONTROLLER
UCC28910	TI	获取价格	High-Voltage Flyback Switcher with Primary-Side Regulation and Output Current Control

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