Datasheet > CS2842AGDR14

CS2842AGDR14

更新时间： 2024-10-13 23:43:39

品牌	Logo	应用领域
其他 - ETC		模拟IC
页数	文件大小	规格书
8页	153K
描述
Analog IC

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CS2842AGDR14 数据手册

CS2842A/CS3842A

CS2843A/CS3843A

Off-Line Current Mode PWM

Control

Features

Circuit with Undervoltage Lockout

Description

The CS284XA, CS384XA provides all

the output stage is enabled. Ion

implant resistors provide tighter con-

trol of undervoltage lockout.

Optimized for Off-line

ꢀ

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 varia-

tions 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 possible. On board logic

ensures that V_REFis stabilized before

Control

Internally Trimmed

Temperature

Other features include low start-up

current, pulse-by-pulse current limit-

ing, and a high-current totem pole out-

put for driving capacitive loads, such

as the gate of power MOSFET. The out-

put 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.

Compensated Oscillator

Maximum Duty-cycle

ꢀ

Clamp

ꢀ V

stabilized before

REF

Output Stage is Enabled

ꢀ Low Start-up Current

ꢀ Pulse-by-pulse Current

Limiting

ꢀ Improved Undervoltage

Lockout

Absolute Maximum Ratings

ꢀ Double Pulse Suppression

Supply Voltage (I_CC<30mA).........................................................................Self Limiting

Supply Voltage (Low Impedance Source) .................................................................30V

Output Current..............................................................................................................±1A

Output Energy (Capacitive Load)................................................................................5µJ

Analog Inputs (V_FB, Sense)...........................................................................-0.3V to 5.5V

Error Amp Output Sink Current.............................................................................10mA

Lead Temperature Soldering

ꢀ 1% Trimmed Bandgap

Reference

ꢀ High Current Totem Pole

Output

Package Options

Wave Solder (through hole styles only)..........10 sec. max, 260°C peak

Reflow (SMD styles only)...........60 sec. max above 183°C, 230°C peak

8 Lead PDIP & SO Narrow

Block Diagram

COMP

V_FB

V_REF

V_CC

V_CCPwr

Undervoltage

Lock-out Circuit

Sense

OSC

V_OUT

Gnd

34V

Set/

V_REF

Reset Reference

Gnd

16V/10V

(8.4V/7.6V)

Internal

Bias

14 Lead SO Narrow

2.50V

Output

Enable

COMP

V_REF

OSC

NOR

Oscillator

V_FB

V_OUT

V_CC

2 R

V_CCPwr

V_OUT

PWM

Latch

V_FB

–

V_C

Error

Amplifier

Pwr Gnd

Sense

Current

Sensing

1 V

COMP

Sense

Comparator

Pwr Gnd

Gnd

OSC

( ) Indicates CS-2843A/3843A

ON Semiconductor

2000 South County Trail, East Greenwich, RI 02818

Tel: (401)885–3600 Fax: (401)885–5786

N. American Technical Support: 800-282-9855

Web Site: www.cherry–semi.com

Rev. 7/9/99

12 3 4 5 6 7 8

中文翻译

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与CS2842AGDR14相关器件

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CS-2842AJ	CHERRY	获取价格	Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, CD
CS2842ALD14	ONSEMI	获取价格	Off-Line Current Mode PWM Control Circuit with Undervoltage Lockout
CS2842ALDR14	ONSEMI	获取价格	Off-Line Current Mode PWM Control Circuit with Undervoltage Lockout
CS2842ALN8	ONSEMI	获取价格	Off-Line Current Mode PWM Control Circuit with Undervoltage Lockout
CS2842ALN8	CHERRY	获取价格	Off-Line Current Mode PWM Control Circuit with Undervoltage Lockout
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CS2843	ETC	获取价格

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