Datasheet > UC3844 UC3845

UC3844 UC3845

更新时间： 2023-12-06 20:02:23

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

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