Datasheet > CS2842A

CS2842A

更新时间： 2024-11-20 04:12:39

品牌	Logo	应用领域
安森美 - ONSEMI		/
页数	文件大小	规格书
10页	274K
描述
Off-Line Current Mode PWM Control Circuit with Undervoltage Lockout

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CS2842A 数据手册

CS2842A, CS3842A,

CS2843A, CS3843A

Off−Line Current Mode

PWM Control Circuit with

Undervoltage Lockout

http://onsemi.com

MARKING

The CS284XA, CS384XA provides all the necessary features to

implement off−line fixed frequency current−mode control with a

minimum number of external components.

The CS384XA family incorporates a new precision

temperature−controlled oscillator with an internally trimmed

discharge current to minimize variations in frequency. A precision

duty−cycle clamp eliminates the need for an external oscillator when a

50% duty−cycle is used. Duty−cycles greater than 50% are also

DIAGRAM

x84yA

AWL

YYWW

DIP−8

N SUFFIX

CASE 626

possible. On board logic ensures that V

is stabilized before the

REF

output stage is enabled. Ion implant resistors provide tighter control of

undervoltage lockout.

Other features include low startup current, pulse−by−pulse current

limiting, and a high−current totem pole output for driving capacitive

loads, such as the gate of power MOSFET. The output is LOW in the

off state, consistent with N−channel devices.

The CS384XA series of current−mode control ICs are available in

8 and14 lead packages for surface mount (SO) applications as well as

8 lead PDIP packages.

SO−8

D SUFFIX

CASE 751

x84yA

ALYWX

SO−14

D SUFFIX

CASE 751A

CSx84yA

AWLYWW

Features

• Optimized for Off−line Control

= 2 or 3

• Internally Trimmed Temperature Compensated Oscillator

• Maximum Duty−Cycle Clamp

= Assembly Location

WL, L = Wafer Lot

YY, Y = Year

WW, W = Work Week

• V

Stabilized Before Output Stage is Enabled

REF

• Low Startup Current

• Pulse−By−Pulse Current Limiting

• Improved Undervoltage Lockout

• Double Pulse Suppression

• 1.0% Trimmed Bandgap Reference

• High Current Totem Pole Output

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 8 of this data sheet.

Publication Order Number:

July, 2006 − Rev. 4

CS2842A/D

12 3 4 5 6 7...10

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