UC1851J

更新时间： 2024-01-06 15:58:31

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信息通信管理
页数	文件大小	规格书
11页	772K
描述
Programmable, Off-Line, PWM Controller

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技术参数
数据手册

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UC1851J 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
零件包装代码：	QLCC	包装说明：	CERAMIC, LCC-20
针数：	20	Reach Compliance Code：	not_compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.71	Is Samacsys：	N
其他特性：	CURRENT MODE OPERATION IS ALSO POSSIBLE	模拟集成电路 - 其他类型：	SWITCHING CONTROLLER
控制模式：	CURRENT/VOLTAGE-MODE	控制技术：	PULSE WIDTH MODULATION
最大输入电压：	30 V	最小输入电压：	8 V
标称输入电压：	20 V	JESD-30 代码：	S-CQCC-N20
长度：	8.89 mm	功能数量：	1
端子数量：	20	最高工作温度：	125 °C
最低工作温度：	-55 °C	最大输出电流：	0.2 A
封装主体材料：	CERAMIC, METAL-SEALED COFIRED	封装代码：	QCCN
封装等效代码：	LCC20,.35SQ	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：	2.54 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：	500 kHz
技术：	BICMOS	温度等级：	MILITARY
端子形式：	NO LEAD	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：	8.89 mm	Base Number Matches：	1

UC1851J 数据手册

UC1851

UC2851

UC3851

Programmable, Off-Line, PWM Controller

FEATURES

DESCRIPTION

•

All Control, Driving, Monitoring, and Protection

Functions Included

The UC1851 family of PWM controllers are optimized for off-

line primary side control. These devices include a high current

totem pole output stage and a toggle flip-flop for absolute 50%

duty cycle limiting. In all other respects this line of controllers is

pin for pin compatible with the UC1841 series. Inclusion of all

major housekeeping functions in these high performance con-

trollers makes them ideal for use in cost sensitive applications.

•

Low-Current Off Line Start Circuit

Voltage Feed Forward or Current Mode Control

High Current Totem Pole Output

50% Absolute Max Duty Cycle

Important features of these controllers include low current

start-up, linear feed-forward for constant volt-second operation,

and compatibility with both voltage or current mode control. In

addition, these devices include a programmable start thresh-

old, as well as programmable over-voltage, under-voltage, and

over current fault thresholds. The fault latch on these devices

can be configured for automatic restart, or latched off response

to a fault.

PWM Latch for Single Pulse Per Period

Pulse-by-Pulse Current Limiting plus Shutdown

for Over-Current Fault

•

No Start-Up or Shutdown Transients

Slow Turn-On Both Initially and After Fault

Shutdown

These devices are packaged in 18-pin plastic or ceramic dual-

in-line packages, or for surface mount applications, a 20 Pin

PLCC. The UC1851 is characterized for -55°C to +125°C op-

eration while the UC2851 and UC3851 are designed for -40°C

to +85°C and 0°C to +70°C, respectively.

•

Shutdown Upon Over or Under Voltage Sensing

Latch Off or Continuous Retry After Fault

1% Reference Accuracy

500kHz Operation

18 Pin DIL or 20 Pin PLCC Package

BLOCK DIAGRAM

10/94

12 3 4 5 6 7...11

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与UC1851J相关器件

型号	品牌	描述	获取价格	数据表
UC1851J883B	TI	Programmable, Off-Line, PWM Controller	获取价格
UC1851L	ETC	Current/Voltage-Mode SMPS Controller	获取价格
UC1852	TI	High Power-Factor Preregulator	获取价格
UC1852_08	TI	High Power-Factor Preregulator	获取价格
UC1852D	ETC	Power Factor Controller	获取价格
UC1852DTR	ETC	Power Factor Controller	获取价格

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