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UC2843BD1

更新时间： 2024-01-16 11:31:56

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		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
15页	239K
描述
HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER

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中文翻译

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技术参数
数据手册
替代型号

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UC2843BD1 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：	SOP, SOP8,.25	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：	0.82	Samacsys Description：	High Performance Current Mode Controllers
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：	25 V
最小输入电压：	12 V	标称输入电压：	15 V
JESD-30 代码：	R-PDSO-G8	JESD-609代码：	e3
长度：	4.9 mm	湿度敏感等级：	1
功能数量：	1	端子数量：	8
最高工作温度：	85 °C	最低工作温度：	-25 °C
最大输出电流：	1 A	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：	500 kHz	技术：	BIPOLAR
温度等级：	OTHER	端子面层：	Tin (Sn)
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：	40
宽度：	3.9 mm

UC2843BD1 数据手册

UC2842B/3B/4B/5B

UC3842B/3B/4B/5B

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER

TRIMMED OSCILLATOR FOR PRECISE FRE-

QUENCY CONTROL

OSCILLATOR FREQUENCY GUARANTEED

AT 250kHz

CURRENT MODE OPERATION TO 500kHz

AUTOMATIC FEED FORWARD COMPENSA-

TION

Minidip

SO8

LATCHING PWM FOR CYCLE-BY-CYCLE

CURRENT LIMITING

INTERNALLY TRIMMED REFERENCE WITH

UNDERVOLTAGE LOCKOUT

HIGH CURRENT TOTEM POLE OUTPUT

UNDERVOLTAGE LOCKOUT WITH HYSTER-

ESIS

comparatorwhich also providescurrentlimitcontrol,

and a totem pole output stage designed to source

or sink high peak current. The output stage, suitable

for driving N-Channel MOSFETs, is low in the off-

state.

LOW START-UP AND OPERATING CURRENT

Differences between members of this family are the

under-voltage lockout thresholds and maximum duty

cycle ranges. The UC3842B and UC3844B have

UVLO thresholds of 16V (on) and 10V (off), ideally

suited off-line applications The corresponding thresh-

olds for the UC3843Band UC3845B are 8.5 Vand7.9

V. The UC3842B and UC3843B can operate to duty

cycles approaching 100%. A range of the zero to <

50 % is obtained by the UC3844B and UC3845B by

the addition of an internal toggle flip flop which blanks

the output off every other clock cycle.

DESCRIPTION

The UC384xBfamilyofcontrol ICsprovidesthenec-

essary features to implement off-line or DC to DC

fixed frequency current mode control schemes with

a minimal external parts count. Internally imple-

mented circuits include a trimmed oscillator for pre-

cise DUTY CYCLE CONTROL under voltage lock-

outfeaturing start-up current less than 0.5mA, a pre-

cision reference trimmed for accuracy at the error

amp input, logic to insure latched operation, a PWM

BLOCK DIAGRAM (toggle flip flop used only in UC3844B and UC3845B)

UVLO

34V

REF

VREF

5V 50mA

S/R

GROUND

INTERNAL

BIAS

2.50V

VREF GOOD

LOGIC

OUTPUT

RT/CT

OSC

ERROR AMP.

VFB

PWM

LATCH

COMP

CURRENT

SENSE

UC3842B

CURRENT

SENSE

COMPARATOR

D95IN331

March 1999

1/15

12 3 4 5 6 7...15

中文翻译

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UC2843BD1 替代型号

型号	品牌	替代类型	描述	数据表
UC2845BD1013TR	STMICROELECTRONICS	完全替代	HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
UC3843BD1013TR	STMICROELECTRONICS	类似代替	HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
UC3845BD1013TR	STMICROELECTRONICS	类似代替	HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER

与UC2843BD1相关器件

型号	品牌	获取价格	描述	数据表
UC2843BD1013TR	STMICROELECTRONICS	获取价格	HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
UC2843BD1G	ONSEMI	获取价格	High Performance Current Mode Controllers
UC2843BD1R2	ONSEMI	获取价格	High Performance Current Mode Controllers
UC2843BD1R2	MOTOROLA	获取价格	1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO8, PLASTIC, SO-8
UC2843BD1R2G	ONSEMI	获取价格	High Performance Current Mode Controllers
UC2843BDG	ONSEMI	获取价格	High Performance Current Mode Controllers
UC2843BDR2	ONSEMI	获取价格	HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC2843BDR2	MOTOROLA	获取价格	1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO14, PLASTIC, SO-14
UC2843BDR2G	ONSEMI	获取价格	High Performance Current Mode Controllers
UC2843BG-D08-R	UTC	获取价格	Switching Controller, Current-mode, 1A, PDIP8, HALOGEN FREE, DIP-8

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