Datasheet > UC3844AQ

UC3844AQ

更新时间： 2024-11-22 23:38:59

品牌	Logo	应用领域
其他 - ETC		开关控制器
页数	文件大小	规格书
7页	519K
描述
Current-Mode SMPS Controller

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

UC3844AQ 数据手册

UC1842A/3A/4A/5A

UC2842A/3A/4A/5A

UC3842A/3A/4A/5A

Current Mode PWM Controller

FEATURES

DESCRIPTION

•

Optimized for Off-line and DC to DC

The UC1842A/3A/4A/5A family of control ICs is a pin for pin compat-

ible improved version of the UC3842/3/4/5 family. Providing the nec-

essary features to control current mode switched mode power

supplies, this family has the following improved features. Start up cur-

rent is guaranteed to be less than 0.5mA. Oscillator discharge is

trimmed to 8.3mA. During under voltage lockout, the output stage can

sink at least 10mA at less than 1.2V for VCC over 5V.

Converters

•

Low Start Up Current (<0.5mA)

Trimmed Oscillator Discharge Current

Automatic Feed Forward Compensation

Pulse-by-Pulse Current Limiting

Enhanced Load Response Characteristics

Under-Voltage Lockout With Hysteresis

Double Pulse Suppression

The difference between members of this family are shown in the table

below.

Maximum Duty

Part #

UVLO On

UVLO Off

Cycle

<100%

<50%

High Current Totem Pole Output

Internally Trimmed Bandgap Reference

500kHz Operation

UC1842A

UC1843A

UC1844A

UC1845A

16.0V

8.5V

10.0V

7.9V

16.0V

8.5V

10.0V

7.9V

<50%

Low RO Error Amp

BLOCK DIAGRAM

A/B

Note 1:

A = DIL-8 Pin Number. B = SO-14 Pin Number.

Note 2: Toggle flip flop used only in 1844A and 1845A.

9/94

12 3 4 5 6 7

中文翻译

下载PDF

与UC3844AQ相关器件

型号	品牌	获取价格	描述	数据表
UC3844AQTR	TI	获取价格	1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PQCC20, PLASTIC, LCC-20
UC3844AY	ETC	获取价格	Analog IC
UC3844B	MOTOROLA	获取价格	HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC3844B	ONSEMI	获取价格	HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC3844B	STMICROELECTRONICS	获取价格	HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
UC3844B	HGSEMI	获取价格	电流型脉宽调制器
UC3844B/D	MOTOROLA	获取价格	High Performance Current Mode Controller
UC3844B_12	ONSEMI	获取价格	High Performance Current Mode Controllers
UC3844BAC	ONSEMI	获取价格	HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC3844BD	STMICROELECTRONICS	获取价格	HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER