Datasheet > CS2841B

CS2841B

更新时间： 2024-11-16 22:40:19

品牌	Logo	应用领域
樱桃 - CHERRY		/
页数	文件大小	规格书
6页	165K
描述
Automotive Current Mode PWM Control Circuit

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CS2841B 数据手册

CS2841B

Automotive Current Mode PWM

Control Circuit

Description

Features

The CS2841B provides all the nec-

quality and reliability in automo-

Off-line

ꢀ Optimized for

essary features to implement off-

line fixed frequency current-mode

control with a minimum number of

external components.

The CS2841B (a variation of the

CS-2843A) is designed specifically

for use in automotive operation.

The low start threshold voltage of

8.0V (typ), and the ability to sur-

vive 40V automotive load dump

transients are important for auto-

motive subsystem designs. The

CS-2841 series has a history of

tive applications.

Control

The CS2841B incorporates a preci-

sion temperature-controlled oscil-

lator with an internally trimmed

discharge current to minimize vari-

ations in frequency. Duty-cycles

greater than 50% are also possible.

On board logic ensures that V_REFis

stabilized before the output stage

is enabled. Ion implant resistors

provide tighter control of under-

voltage lockout.

ꢀ Internally Trimmed

Temperature

Compensated Oscillator

ꢀ Maximum Duty-cycle

Clamp

ꢀ V_REFStabilized before

Output Stage Enabled

ꢀ Low Start-up Current

ꢀ Pulse-by-pulse Current

Limiting

ꢀ Improved Undervoltage

Lockout

Absolute Maximum Ratings

ꢀ Double Pulse Suppression

Supply Voltage (Low Impedance Source)...................................................40V

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

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

Package Options

Block Diagram

8 Lead PDIP

COMP

V_FB

V_REF

V_CC

V_CCPwr

Undervoltage

Lock-out Circuit

Sense

OSC

V_OUT

Gnd

Set/

V_REF

Reset Reference

Gnd

8.0V/7.4V

Internal

Bias

14 Lead SO Narrow

2.50V

Output

Enable

COMP

V_REF

OSC

NOR

Oscillator

V_OUT

V_FB

V_CC

2 R

–

V_CCPwr

V_OUT

PWM

Latch

V_FB

V_C

Sense

Error

Amplifier

Pwr Gnd

Current

Sensing

1 V

Pwr Gnd

Gnd

COMP

Sense

Comparator

OSC

Cherry Semiconductor Corporation

2000 South County Trail, East Greenwich, RI 02818

Tel: (401)885-3600 Fax: (401)885-5786

Email: info@cherry-semi.com

Web Site: www.cherry-semi.com

Rev. 6/23/99

Company

12 3 4 5 6

中文翻译

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与CS2841B相关器件

型号	品牌	获取价格	描述	数据表
CS-2841B	ETC	获取价格
CS2841B/D	ETC	获取价格	Automotive Current Mode PWM Control Circuit
CS2841BEBN8	ONSEMI	获取价格	Automotive Current Mode PWM Control Circuit
CS2841BEBN8G	ONSEMI	获取价格	Automotive Current Mode PWM Control Circuit
CS2841BED14	CHERRY	获取价格	Automotive Current Mode PWM Control Circuit
CS2841BED14	ONSEMI	获取价格	Automotive Current Mode PWM Control Circuit
CS2841BED14G	ONSEMI	获取价格	Automotive Current Mode PWM Control Circuit
CS2841BEDR14	CHERRY	获取价格	Automotive Current Mode PWM Control Circuit
CS2841BEDR14	ONSEMI	获取价格	Automotive Current Mode PWM Control Circuit
CS2841BEDR14G	ONSEMI	获取价格	Automotive Current Mode PWM Control Circuit

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