Datasheet > UC2843BG-S08-T

UC2843BG-S08-T

更新时间： 2024-10-04 01:04:15

品牌	Logo	应用领域
友顺 - UTC		/
页数	文件大小	规格书
8页	285K
描述
HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS

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UC2843BG-S08-T 数据手册

UNISONIC TECHNOLOGIES CO., LTD

UC2843B

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

* Automatic feed-forward compensation

* Low start-up current value<0.5mA

* Latching PWM for cycle-by-cycle current limiting

* Trimmed oscillator discharge current

* Internally trimmed reference with UVLO

* High-current totem-pole output UVLO with hysteresis

* Double-pulse suppression



ORDERING INFORMATION

Ordering Number

Lead Free

Package

Packing

Halogen Free

UC2843BL-S08-R

UC2843BL-S08-T

UC2843BL-D08-T

UC2843BG-S08-R

UC2843BG-S08-T

UC2843BG-D08-T

SOP-8

DIP-8

Tape Reel

Tube

www.unisonic.com.tw

1 of 8

QW-R103-048.D

12 3 4 5 6 7 8

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与UC2843BG-S08-T相关器件

型号	品牌	获取价格	描述	数据表
UC2843BL-D08-R	UTC	获取价格	Switching Controller, Current-mode, 1A, PDIP8, LEAD FREE, DIP-8
UC2843BL-D08-T	UTC	获取价格	Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDIP8, DIP-8
UC2843BL-S08-R	UTC	获取价格	Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO8, SOP-8
UC2843BL-S08-T	UTC	获取价格	HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS
UC2843BN	ONSEMI	获取价格	High Performance Current Mode Controllers
UC2843BN	MOTOROLA	获取价格	HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC2843BN	STMICROELECTRONICS	获取价格	HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
UC2843BNG	ONSEMI	获取价格	High Performance Current Mode Controllers
UC2843D	STMICROELECTRONICS	获取价格	CURRENTMODE PWM CONTROLLER
UC2843D	TI	获取价格	Current Mode PWM Controller