UC3845N

更新时间： 2024-02-20 15:54:39

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		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
12页	129K
描述
SMPS Controller

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UC3845N 技术参数

生命周期：	Obsolete	包装说明：	DFP, FL14,.25
Reach Compliance Code：	unknown	风险等级：	5.84
Is Samacsys：	N	控制模式：	CURRENT-MODE
JESD-30 代码：	R-XDFP-F14	端子数量：	14
最高工作温度：	70 °C	最低工作温度：
最大输出电流：	0.2 A	封装主体材料：	CERAMIC
封装代码：	DFP	封装等效代码：	FL14,.25
封装形状：	RECTANGULAR	封装形式：	FLATPACK
认证状态：	Not Qualified	子类别：	Switching Regulator or Controllers
表面贴装：	YES	最大切换频率：	500 kHz
技术：	BIPOLAR	温度等级：	COMMERCIAL
端子形式：	FLAT	端子节距：	1.27 mm
端子位置：	DUAL	Base Number Matches：	1

www.fairchildsemi.com

UC3842/UC3843/UC3844/UC3845

SMPS Controller

Features

Description

• Low Start up Current

• Maximum Duty Clamp

• UVLO With Hysteresis

• Operating Frequency up to 500KHz

The UC3842/UC3843/UC3844/UC3845 are fixed

frequencycurrent-mode PWM controller. They are specially

designed for Off-Line and DC to DC converter applications

with minimum external components. These integrated

circuits feature a trimmed oscillator for precise duty cycle

control, a temperature compensated reference, high gain

error amplifier, current sensing comparator and a high

current totempole output for driving a Power MOSFET. The

UC3842 and UC3844 have UVLO thresholds of 16V (on)

and 10V (off). The UC3843 and UC3845 are 8.5V(on) and

7.9V (off). The UC3842 and UC3843 can operate within

100% duty cycle. The UC3844 and UC3845 can operate

with 50% duty cycle.

8-SOP

8-DIP

14-SOP

Internal Block Diagram

* NORMALLY 8DIP/8SOP PIN NO.

* ( ) IS 14SOP PINNO.

* TOGGLE FLIP FLOP USED ONLY IN UC3844, UC3845

Rev. 1.0.1

12 3 4 5 6 7...12

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型号	品牌	描述	获取价格	数据表
UC3845NG	ONSEMI	High Performance Current Mode Controllers	获取价格
UC3845NG4	TI	CURRENT MODE PWM CONTROLLER	获取价格
UC3845P	TI	Current Mode PWM Controller	获取价格
UC3845P	ROCHESTER	1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDIP8, PLASTIC, DIP-8	获取价格
UC3845Q	ETC	Current-Mode SMPS Controller	获取价格
UC3845QTR	TI	1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PQCC20, PLASTIC, LCC-20	获取价格