Datasheet > CS52843/D

CS52843/D

更新时间： 2024-09-27 23:43:47

品牌	Logo	应用领域
其他 - ETC		/
页数	文件大小	规格书
8页	58K
描述
Current Mode PWM Control Circuit

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中文翻译

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数据手册

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CS52843/D 数据手册

CS52843

Current Mode PWM

Control Circuit

Description

Features

Optimized for Off-line

ꢀ

The CS52843 provides all the nec-

before the output stage is enabled.

In the CS52843 turn on is at 8.4V

and turn off at 7.6V.

Control

essary features to implement off-

line fixed frequency current-mode

control with a minimum number

of external components.

Temperature

ꢀ Internally

Compensated Oscillator

Other features include low start-up

current, pulse-by-pulse current lim-

iting, and a high-current totem pole

output for driving capacitive loads,

such as gate of a power MOSFET.

The output is low in the off state,

consistent with N-channel devices.

ꢀ V

Stabilized before

REF

Output Stage is Enabled

The CS52843 incorporates a new

precision temperature-controlled

oscillator to minimize variations in

frequency. An undervoltage lock-

out ensures that V_REFis stabilized

ꢀ Very Low Start-up Current

300 µA (typ)

ꢀ Pulse-by-pulse Current

Limiting

ꢀ Improved Undervoltage

Absolute Maximum Ratings

Lockout

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

ꢀ Double Pulse Suppression

ꢀ 2% 5 Volt Reference

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

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

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

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

ꢀ High Current Totem Pole

Output

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

Lead Temperature Soldering

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

Block Diagram

Package Options

8L SO Narrow

V_CCUndervoltage Lock-out

V_CC

V_CCPwr

V_REF

COMP

V_FB

V_CC

34V

Set/

5.0 Volt

V_REF

Reset Reference

V_OUT

Gnd

Sense

OSC

Gnd

V_FB

8.4V/7.6V

Internal

Bias

Error

Amplifier

14L SO Narrow

OUTPUT

ENABLE

COMP

V_REF

2.50V

V_OUT

NOR

OSC

V_FB

V_CC

Oscillator

11 V_CCPwr

2 R

Pwr Gnd

Sense

V_OUT

Pwr Gnd

Gnd

PWM

Latch

Current

Sensing

Comparator

Sense

OSC

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

June, 1999 - Rev. 2

12 3 4 5 6 7 8

中文翻译

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与CS52843/D相关器件

型号	品牌	获取价格	描述	数据表
CS-52843D14	ETC	获取价格	Current-Mode SMPS Controller
CS-52843D8	ETC	获取价格	Current-Mode SMPS Controller
CS-52843DR14	CHERRY	获取价格	Switching Controller, Current-mode, 1A, PDSO14,
CS52843ED14	ONSEMI	获取价格	Current Mode PWM Control Circuit
CS52843ED14	CHERRY	获取价格	Current Mode PWM Control Circuit
CS52843ED8	CHERRY	获取价格	Current Mode PWM Control Circuit
CS52843ED8	ONSEMI	获取价格	Current Mode PWM Control Circuit
CS52843EDR14	ONSEMI	获取价格	Current Mode PWM Control Circuit
CS52843EDR14	CHERRY	获取价格	Current Mode PWM Control Circuit
CS52843EDR8	CHERRY	获取价格	Current Mode PWM Control Circuit

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