UC3843AD

更新时间： 2024-01-10 11:43:27

品牌	Logo	应用领域
美高森美 - MICROSEMI		开关光电二极管控制器
页数	文件大小	规格书
8页	229K
描述
CURRENT MODE PWM CONTROLLER

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技术参数
数据手册

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UC3843AD 技术参数

生命周期：	Obsolete	包装说明：	DIE,
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.64
模拟集成电路 - 其他类型：	SWITCHING CONTROLLER	控制模式：	CURRENT-MODE
控制技术：	PULSE WIDTH MODULATION	最大输入电压：	30 V
JESD-30 代码：	X-XUUC-N8	功能数量：	1
端子数量：	8	最高工作温度：	70 °C
最低工作温度：		最大输出电流：	1 A
标称输出电压：	2.5 V	封装主体材料：	UNSPECIFIED
封装代码：	DIE	封装形状：	UNSPECIFIED
封装形式：	UNCASED CHIP	认证状态：	Not Qualified
最大供电电流 (Isup)：	25 mA	表面贴装：	YES
切换器配置：	SINGLE	最大切换频率：	500 kHz
技术：	BIPOLAR	温度等级：	COMMERCIAL
端子形式：	NO LEAD	端子位置：	UPPER
Base Number Matches：	1

UC3843AD 数据手册

LIN DOC #: 1840

UC184xA/284xA/384xA

C U R R E N T M O D E P W M C O N T R O L L E R

P R O D U C T I O N D A T A S H E E T

T H E I N F I N I T E P O W E R O F I N N O V A T I O N

DESCRIPTION

KEY FEATURES

■ LOW START-UP CURRENT. (0.5mA max.)

■ TRIMMED OSCILLATOR DISCHARGE

The UC184xA family of control ICs

provides all the necessary features to

implement off-line fixed-frequency,

current-mode switching power supplies

with a minimum of external compo-

nents. The current mode architecture

demonstrates improved load regulation,

pulse-by-pulse current limiting and

inherent protection of the power supply

output switch. The IC includes: A

bandgap reference trimmed to ±1%

accuracy, an error amplifier, a current

sense comparator with internal clamp to

1V, a high current totem pole output

stage for fast switching of power

MOSFET's, and an externally program-

mable oscillator to set frequency and

CURRENT. (See Product Highlight)

maximum duty cycle. The under-

voltage lock-out is designed to operate

with 250µA typ. start-up current,

allowing an efficient bootstrap supply

voltage design. Available options for

this family of products, such as start-up

voltage hysteresis and duty cycle, are

summarized below in the Available

Options section. The UC184xA family

of control ICs is also available in 14-pin

SOIC package which makes the Power

Output Stage Collector and Ground pins

available.

p OPTIMIZED FOR OFF-LINE AND DC-TO-DC

CONVERTERS.

p AUTOMATIC FEED FORWARD

COMPENSATION.

p PULSE-BY-PULSE CURRENT LIMITING.

p ENHANCED LOAD RESPONSE

CHARACTERISTICS.

p UNDER-VOLTAGE LOCKOUT WITH

HYSTERESIS.

p DOUBLE PULSE SUPPRESSION.

p HIGH-CURRENT TOTEM POLE OUTPUT.

p INTERNALLY TRIMMED BANDGAP

REFERENCE.

p 500KHz OPERATION.

PRODUCT HIGHLIGHT

p LOW R_OERROR AMPLIFIER.

COMPARISON OF UC384XA VS. SG384X DISCHARGE CURRENT

APPLICATIONS

UC384xA

■ ECONOMICAL OFF-LINE FLYBACK OR

SG384x

Min. Limit

Max. Limit

FORWARD CONVERTERS.

T_A=25°C

■ DC-DC BUCK OR BOOST CONVERTERS.

■ LOW COST DC MOTOR CONTROL.

A V A

O P

T I O N S

Part #

Start-Up Hysteresis Max. Duty

Voltage

16V

Cycle

<100%

<50%

UCx842A

0.8V

UCx843A 8.4V

UCx844A 16V

UCx845A 8.4V

7.5

7.8

−3σ

8.3

Mean

8.8

+3σ

9.3

0.8V

Discharge Current Distribution - mA

PACKAGE ORDER INFORMATION

Plastic DIP

8-pin

Plastic SOIC

8-pin

Plastic SOIC

14-pin

Ceramic DIP

8-pin

T_A(°C)

0 to 70

-40 to 85

-55 to 125

UC384xAM

UC284xAM

—

UC384xADM

UC284xADM

—

UC384xAD

UC284xAD

—

UC284xAY

UC184xAY

Note: All surface-mount packages are available in Tape & Reel. Append the letter "T" to part number. (i.e. UC3842ADMT)

F O R F U R T H E R I N F O R M AT I O N C A L L ( 7 1 4 ) 8 9 8 - 8 1 2 1

Rev. 1.2 12/95

11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841

12 3 4 5 6 7 8

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UC3843AD_NL	FAIRCHILD	Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO8, LEAD FREE, SOP-8	获取价格
UC3843A-D08-T	UTC	CURRENT MODE PWM CONTROL CIRCUITS	获取价格
UC3843AD1	ONSEMI	High Performance Current Mode Controllers	获取价格
UC3843AD1	STMICROELECTRONICS	HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER	获取价格
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UC3843AD1G	ONSEMI	High Performance Current Mode Controllers	获取价格

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