Datasheet > UC3842A_05

UC3842A_05

更新时间： 2024-11-04 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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UC3842A_05 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

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与UC3842A_05相关器件

型号	品牌	获取价格	描述	数据表
UC3842A_07	ONSEMI	获取价格	High Performance Current Mode Controllers
UC3842A_11	UTC	获取价格	CURRENT MODE PWM CONTROL CIRCUITS
UC3842A_12	UTC	获取价格	CURRENT MODE PWM CONTROL CIRCUITS
UC3842A_17	UTC	获取价格	CURRENT MODE PWM CONTROL CIRCUITS
UC3842A-BW	FCI	获取价格	Current Mode PWM Controller Low Start-Up and Operating Current
UC3842ACD	ETC	获取价格	Analog IC
UC3842ACS	ETC	获取价格	Analog IC
UC3842AD	FAIRCHILD	获取价格	SMPS Controller
UC3842AD	MOTOROLA	获取价格	HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC3842AD	ONSEMI	获取价格	HIGH PERFORMANCE CURRENT MODE CONTROLLERS

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