Datasheet > UC2843B

UC2843B

更新时间： 2024-11-04 08:26:27

品牌	Logo	应用领域
友顺 - UTC		控制器
页数	文件大小	规格书
9页	205K
描述
HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS

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UC2843B 数据手册

UNISONIC TECHNOLOGIES CO., LTD

UC2843B

Preliminary

LINEAR INTEGRATED CIRCUIT

HIGH-PERFORMANCE

CURRENT-MODE PWM

CONTROLLERS

DESCRIPTION

The UTC UC2843B provides off-line or DC-DC fixed-frequency

current-mode control design with minimum external components.

Internally-implemented circuits include an under-voltage lockout

(UVLO) and a precision reference with accuracy at the error amplifier

input. The UTC UC2843B also contain internal circuits which include

a pulse width modulation (PWM) comparator providing current-limit

control, logic ensuring latched operation, and a totem-pole output

stage designed to source or sink high-peak current. The output

stage is low when it is in off-state condition and suitable for

N-channel MOSFETs driving.

The UTC UC2843B also has following advantages: the start-up

current lower than 0.5mA while the oscillator discharge current is

specified to 8.3mA (Typ.). In UVLO conditions, the output has a

maximum saturation voltage of 1.2V when sinking 10mA@V_CC= 5V.

The typical UVLO threshold of the UTC UC2843B is 8.4V (on)

and 7.6V (off) and can operate to duty cycles approximately 100%.

FEATURES

Current mode operation:500 kHz

Low start-up current value<0.5mA

Latching PWM for cycle-by-cycle current limiting

Trimmed oscillator discharge current

Automatic feed-forward compensation

Internally trimmed reference with UVLO

High-current totem-pole output UVLO with hysteresis

Double-pulse suppression

Halogen free

ORDERING INFORMATION

Ordering Number

UC2843BG-S08-R

Package

SOP-8

Packing

Tape Reel

www.unisonic.com.tw

1 of 9

QW-R103-048.a

12 3 4 5 6 7...9

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UC2843B 替代型号

型号	品牌	替代类型	描述	数据表
UC3843AL-D08-T	UTC	功能相似	CURRENT MODE PWM CONTROL CIRCUITS

与UC2843B相关器件

型号	品牌	获取价格	描述	数据表
UC2843B_13	UTC	获取价格	HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS
UC2843B_15	UTC	获取价格	HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS
UC2843BD	ONSEMI	获取价格	High Performance Current Mode Controllers
UC2843BD	MOTOROLA	获取价格	HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC2843BD1	ONSEMI	获取价格	High Performance Current Mode Controllers
UC2843BD1	MOTOROLA	获取价格	HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC2843BD1	STMICROELECTRONICS	获取价格	HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
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