Datasheet > A80605KESJSR-1

A80605KESJSR-1

更新时间： 2023-12-18 00:00:00

品牌	Logo	应用领域
急速微 - ALLEGRO		/
页数	文件大小	规格书
42页	4624K
描述
High Power LED Driver with Pre-Emptive Boost for Ultra-High Dimming Ratio and Low Output Ripple

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数据手册

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A80605KESJSR-1 数据手册

A80605 and

A80605-1

High Power LED Driver with Pre-Emptive Boost

for Ultra-High Dimming Ratio and Low Output Ripple

ꢍꢄUꢊ

ꢍ_SꢉNSꢉ

ꢍꢅRꢍ

Sꢖ

ꢉꢛternal

SꢙNꢇ

ꢇ_ꢅꢎꢊH

R_ꢀSꢉꢊ

R_ꢅꢎꢊH

ꢈ1

ꢏAꢊꢉ

ꢇ_ꢅRꢍ

ꢅꢎꢊH

ꢀSꢉꢊꢌSꢙNꢇ

ꢍꢎN

ꢄscillator

ꢏate ꢅriꢆer

ꢈꢅꢄ ꢑꢕ.5 ꢍꢓ

ꢀreꢟꢁency

dithering

ꢏꢅRꢍ

NMꢄS

ꢏate

ꢅriꢆe

ꢉnaꢚle

ꢔ_Sꢖ

ꢂoost

ꢉnaꢚle

ꢇS

ꢇꢄMP

ꢇomꢋarator

R_ꢇS

PꢏNꢅ

ꢇꢄMP

PꢏNꢅ

ꢇꢁrrent

sense

Soꢔt Start

Ramꢋ

ꢑ1ꢕmsꢓ

ꢇ_ꢇꢄMP

ꢍ_ꢈꢉꢅ

reꢔ

1 MHꢜ

ꢠꢒ

ꢈꢉꢅ1

ꢒ MHꢜ

Mꢁlti-inꢋꢁt

ꢄꢇPꢐ

ꢊSꢅ

ꢉrror Amꢋ

System

oscillator

ꢈꢉꢅꢒ

ꢍꢄUꢊ

ꢀSꢉꢊ or ꢎSꢉꢊ

ꢋin ꢄꢋenꢌShort

ꢍꢅꢅ

ꢎnternal ꢍꢅꢅ

ꢑꢒ.ꢐ5 ꢍꢓ

ꢇ_ꢍꢅꢅ

R_ꢄꢍP

ꢍꢎN

ꢄꢍP

sense

Regꢁlator

Uꢍꢈꢄ ꢂlocꢃ

1.ꢐ35 ꢍ

Rꢉꢀ

ꢄꢍP

ꢍreꢔ

ꢀaꢁlt ꢂlocꢃ

AꢏNꢅ

R_SꢉNSꢉ

ꢉnaꢚle

ꢄꢋenꢌShort

ꢈꢉꢅ ꢅetect

ꢗ

ꢎnꢋꢁt cꢁrrent

sense amꢋ

ꢍ

SꢉNSꢉ

ꢇhoꢋꢋing

ꢔreꢟ ꢡ ꢒ MHꢜ

i_Aꢅꢘ

ꢈꢉꢅ1

ꢈꢉꢅꢐ

ꢈꢉꢅ

ꢅriꢆer

ꢂlocꢃ

ꢍꢎN

ꢄnꢌꢄꢔꢔ

ꢏAꢊꢉ

ꢄꢀꢀ

ꢂoost

ꢉnaꢚle

ꢏAꢊꢉ

ꢇꢁrrent

leꢆel

ꢈꢉꢅꢕ

AꢅꢎMꢌ

PMꢄS

ꢅriꢆer

AꢏNꢅ

ꢇlocꢃ

detector

ꢉnaꢚle

APꢖM

100 kΩ

ꢍreꢔ

ꢎnt ꢍꢅꢅ

ꢉNꢌPꢖM

ꢎSꢉꢊ

ꢞeeꢋ-Aliꢆe

ꢊimer

ꢎSꢉꢊ

ꢂlocꢃ

50 kΩ

1 MHꢜ

ꢉꢛternal PꢖM

100 Hꢜ ꢝ ꢐ0 ꢞHꢜ

R_ꢎSꢉꢊ

ꢍꢅꢅ

ꢉꢛternal

ꢈꢉꢅ ꢉnaꢚle

ꢀAUꢈꢊ

R_PU

start

Pre-ꢉmꢋtiꢆe

ꢂoost

Pꢉꢂ

ꢀAUꢈꢊ

ꢎnternal ꢀAUꢈꢊ

delay

R_Pꢉꢂ

A80605

AꢏNꢅ

Figure 3: Functional Block Diagram

Allegro MicroSystems

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

1 2 345 6 7...42

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