Datasheet > LTC7841

LTC7841

更新时间： 2024-11-29 14:57:19

品牌	Logo	应用领域
亚德诺 - ADI		控制器
页数	文件大小	规格书
50页	1726K
描述
具有PMBus接口的多相同步升压控制器

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中文翻译

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LTC7841 数据手册

LTC7841

PolyPhase Synchronous Boost

Controller with PMBus Interface

FEATURES

DESCRIPTION

The LTC^®7841 is a high performance PolyPhase^®single

output synchronous boost converter controller that drives

two N-channel power MOSFET stages out-of-phase.

Multiphase operation reduces input and output capaci-

tor requirements and allows the use of smaller inductors

than the single-phase equivalent. Synchronous rectifica-

Wide V Range: 4.5V to 60V

1% Total Output Voltage Accuracy Over

Temperature at V = 12V

PMBus Compliant Serial Interface:

Programmable V

OUT

Up to 60V with 0.2% Resolution

Read Back of Average and Peak Temperature,

Current, and Voltage (25Hz Refresh Rate)

Fault Status

tion increases efficiency, reduces power loss and eases

thermal requirements, enabling high power boost applica-

tions. The output voltage can be adjusted up to 60V with

0.2% resolution via a PMBus-compliant serial interface.

The serial interface can also be used to read back fault

status, input/output current, input/output voltage and

temperature. System configuration and monitoring is

supported by the LTpowerPlay^®development system.

Phase-Lockable Frequency: 75kHz to 850kHz

Less than 1ms Power-Up Time

Power Good Output Voltage Monitor

Internal LDO Powers Gate Driver from VBIAS or EXTV

Low Shutdown Current: I < 10µA

Clock Out for 4-Phase Operation (40A Output Current)

Available in a Thermally-Enhanced 5mm x 6mm QFN

AEC-Q100 Qualification In Progress

PolyPhase operation allows the LTC7841 to be configured

for 2-, 3-, 4-, 6-, and 12-phase operation.

All registered trademarks and trademarks are the property of their respective owners. Protected

by U. S. Patents, including 5408150, 5481178, 5705919, 5929620, 6144194, 6177787,

6580258.

APPLICATIONS

Automotive Systems, Medical, Industrial

TYPICAL APPLICATION

3.3µH

4mΩ

SENSE1

47µF

–

BG1

Efficiency and Power Loss vs Output Current

BOOST1

100

0.1µF

4.7µF

OUT

4.5V TO 60V

VBIAS

24V AT 10A

SW1

TG1

220µF

LTC7841

INTV

OUT

FOLLOWS V

3.3µH

4mΩ

FOR V > 24V

BURST EFFICIENCY

ALERT

SDA

SCL

PMBUS

470pF

BURST LOSS

0.1µF

SENSE2

= 12V

= 24V

–

OUT

BG2

84 Burst Mode OPERATION

FIGURE 21 CIRCUIT

CSLEW

BOOST2

0.1µF

FREQ

ASEL

PLLIN/MODE

0.01

0.1

SW2

TG2

LOAD CURRENT (A)

7841 F10b

OUT

VFB

ITH

SGND

7841 TA01a

232k

15nF

PGND

12.1k

8.66k

100pF

Rev. A

Document Feedback

For more information www.analog.com

12 3 4 5 6 7...50

中文翻译

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