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UC3842AN2

更新时间： 2024-11-26 04:48:15

品牌	Logo	应用领域
安森美 - ONSEMI		控制器
页数	文件大小	规格书
18页	360K
描述
High Performance Current Mode Controllers

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中文翻译

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数据手册
替代型号

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UC3842AN2 数据手册

UC3842A, UC3843A,

UC2842A, UC2843A

High Performance

Current Mode Controllers

The UC3842A, UC3843A series of high performance fixed

frequency current mode controllers are specifically designed for

off−line and DC−to−DC converter applications offering the designer a

cost effective solution with minimal external components. These

integrated circuits feature a trimmed oscillator for precise duty cycle

control, a temperature compensated reference, high gain error

amplifier, current sensing comparator, and a high current totem pole

output ideally suited for driving a power MOSFET.

Also included are protective features consisting of input and

reference undervoltage lockouts each with hysteresis, cycle−by−cycle

current limiting, programmable output deadtime, and a latch for single

pulse metering.

http://onsemi.com

PDIP−8

N SUFFIX

CASE 626

SOIC−14

D SUFFIX

CASE 751A

These devices are available in an 8−pin dual−in−line plastic package

as well as the 14−pin plastic surface mount (SOIC−14). The SOIC−14

package has separate power and ground pins for the totem pole output

stage.

The UCX842A has UYLO thresholds of 16 V (on) and 10 V (off),

ideally suited for off−line converters. The UCX843A is tailored for

lower voltage applications having UVLO thresholds of 8.5 V (on) and

7.6 V (off).

SOIC−8

D1 SUFFIX

CASE 751

PIN CONNECTIONS

Features

• Trimmed Oscillator Discharge Current for Precise Duty Cycle

Control

• Current Mode Operation to 500 kHz

• Automatic Feed Forward Compensation

Compensation

Voltage Feedback

Current Sense

ref

Output

GND

R /C

• Latching PWM for Cycle−By−Cycle Current Limiting

• Internally Trimmed Reference with Undervoltage Lockout

• High Current Totem Pole Output

(Top View)

Compensation

ref

• Undervoltage Lockout with Hysteresis

• Low Startup and Operating Current

• Direct Interface with ON Semiconductor SENSEFET™ Products

• Pb−Free Packages are Available

Voltage Feedback

Current Sense

Output

GND

R /C

Power Ground

(Top View)

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 15 of this data sheet.

DEVICE MARKING INFORMATION

See general marking information in the device marking

section on page 16 of this data sheet.

Semiconductor Components Industries, LLC, 2005

Publication Order Number:

November, 2005 − Rev. 8

UC3842A/D

12 3 4 5 6 7...18

中文翻译

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UC3842AN2 替代型号

型号	品牌	替代类型	描述	数据表
UC3842ANG	ONSEMI	完全替代	High Performance Current Mode Controllers
UC3842BNG	ONSEMI	类似代替	High Performance Current Mode Controllers
UC3842J	TI	类似代替	Current Mode PWM Controller

与UC3842AN2相关器件

型号	品牌	获取价格	描述	数据表
UC3842AN2G	ONSEMI	获取价格	High Performance Current Mode Controllers
UC3842ANG	ONSEMI	获取价格	High Performance Current Mode Controllers
UC3842ANG4	TI	获取价格	Current Mode PWM Controller
UC3842AP-D08-T	UTC	获取价格	CURRENT MODE PWM CONTROL CIRCUITS
UC3842AP-S08-R	UTC	获取价格	CURRENT MODE PWM CONTROL CIRCUITS
UC3842AP-S08-T	UTC	获取价格	CURRENT MODE PWM CONTROL CIRCUITS
UC3842AQ	ETC	获取价格	Current-Mode SMPS Controller
UC3842AQTR	TI	获取价格	1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PQCC20, PLASTIC, LCC-20
UC3842A-S08-R	UTC	获取价格	CURRENT MODE PWM CONTROL CIRCUITS
UC3842A-S08-T	UTC	获取价格	CURRENT MODE PWM CONTROL CIRCUITS

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