Datasheet > UC3844 UC3845

UC3844 UC3845

更新时间： 2024-11-24 14:53:07

品牌	Logo	应用领域
友顺 - UTC		/
页数	文件大小	规格书
7页	405K
描述
PWM Controllers with Low Start-Up Current

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UC3844 UC3845 数据手册

UNISONIC TECHNOLOGIES CO., LTD

UC3844/45

LINEAR INTEGRATED CIRCUIT

HIGH PERFORMANCE

CURRENT MODE PWM

CONTROLLERS



DESCRIPTION

The UTC UC3844/3845 are high performance fixed frequency

current mode controllers that specifically designed for Off-Line and

DC to DC converter applications with minimal external parts count.

The differences between UC3844 and UC3845 are the

under-voltage lockout thresholds. The UC3844 ideally suited to

off-line applications with UVLO thresholds of 16V_(ON)and 10V_(OFF)

and UC3845 has UVLO thresholds of 8.4V_(ON)and 7.6V_(OFF)for

lower voltage applications.



FEATURES

* Operation output switching frequency up to 500 kHz

* Automatic feed forward compensation

* Latching PWM for cycle-by-cycle current limiting

* High current totem pole output

* Internally trimmed reference with under voltage lockout

* UVLO with hysteresis

* Low startup and operating current



ORDERING INFORMATION

Ordering Number

Package

Packing

Lead Free

Halogen Free

UC3844L-D08-T

UC3844L-S08-R

UC3845L-D08-T

UC3845L-S08-R

UC3844G-D08-T

UC3844G-S08-R

UC3845G-D08-T

UC3845G-S08-R

DIP-8

SOP-8

DIP-8

Tube

Tape Reel

Tube

SOP-8

Tape Reel

www.unisonic.com.tw

1 of 7

QW-R103-010.R

12 3 4 5 6 7

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与UC3844 UC3845相关器件

型号	品牌	获取价格	描述	数据表
UC3844/D	ETC	获取价格	High Performance Current Mode Controller
UC3844_06	ONSEMI	获取价格	High Performance Current Mode Controllers
UC3844_11	UTC	获取价格	HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS
UC3844_13	UTC	获取价格	HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS
UC3844A	STMICROELECTRONICS	获取价格	HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
UC3844A	MICROSEMI	获取价格	CURRENT MODE PWM CONTROLLER
UC3844A	TI	获取价格	Current Mode PWM Controller
UC3844A	FCI	获取价格	High Performance Current Mode Controller
UC3844A-BW	FCI	获取价格	Current Mode PWM Controller Low Start-Up and Operating Current
UC3844AD	MICROSEMI	获取价格	CURRENT MODE PWM CONTROLLER