SC2646BTSTRT

更新时间： 2024-01-18 18:15:40

品牌	Logo	应用领域
商升特 - SEMTECH		控制器
页数	文件大小	规格书
9页	168K
描述
2, 3 or 4 Phase Combi-Sense PWM Controller

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数据手册

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SC2646BTSTRT 数据手册

SC2646B

2, 3 or 4 Phase

Combi-Sense^TMPWM Controller

POWER MANAGEMENT

Features

Description

VRD/VRM10.X compliant

The SC2646B controller provides a microprocessor core

voltage regulation solution for up to 4 paralleled PWM

channels. The solution can be configured in 2, 3, or 4-

phase form. This multi-phase buck regulator utilizes

phase-shift timing control to allow interleaved switching

of the power switches. The product’s architecture mini-

mizes the core voltage ripple and the input current ripple,

which leads to optimized voltage regulator design for

power density, transient responses, and thermal

performances.

Core Voltage Set Point Accuracy 0.5%

Combi-Sense^TMCurrent Mode Control

Intrinsic Phase Current Matching

Fast Transient Responses

Active Droop to Meet Load Line Slope

Enable Function for Power Sequencing

Cycle-by-Cycle Peak Current Limit

Intelligent Over Current Shut Down

Over Voltage Protection When Using Semtech

Combi-Sense^TMDriver SC1211

Under Voltage Protection Built in

Externally Programmable Soft-Start

Externally Programmable Switching Frequency

2, 3, or 4-Phase Configurations

24-Pin TSSOP Package

To satisfy the highly dynamic nature of the modern micro-

processors, the SC2646B adopts peak current mode

control topology which ensures wide control loop band-

width and fast transient responses. The current mode

control provides intrinsic phase current matching. The

maximum ripple frequency is greater than 2MHz.

One of the outstanding features of the SC2646B device

is its voltage regulation accuracy. Not only does it pro-

vide 0.5% set point accuracy, but also the accuracy to

be fully compliant with stringent load line slope specifi-

cations mandated by the modern microprocessors.

Combi-Sense^TMis a Trademark of Semtech Corporation

Applications

Lossless output current sensing ensures the regulator Voltage Regulator VRD/VRM10.X

output voltage is accurately positioned according to the Voltage Regulation Modules

load current condition.

High Current, Low Voltage Step Down DC/DC

Converters

Semtech’s patented Combi-Sense^TMtopology is employed

by SC2646B controller. The MOSFET R_ds(on)and the out-

put inductor winding resistance is used to generate the

phase current information. Semtech’s SC1211 Combi-

Sense^TMMOSFET driver works with the SC2646B to en-

able a complete solution.

The cycle-by-cycle current limit plus the intelligent over

current shut down provide the maximum versatility of

the system without false tripping under all possible

changes of VID and load conditions. The differential

voltage feedback sense eliminates the error caused by

high load current on the ground plane. External offset is

easy to achieve for the VID settings. The enable func-

tion is also provided to interface with the corresponding

system signal for correct start up timing and shut down

timing.

Revision: Apr. 11, 2005

www.semtech.com

12 3 4 5 6 7...9

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与SC2646BTSTRT相关器件

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SC2647	SEMTECH	获取价格	Multi-Platform Multi-Phase PWM Controller
SC2647EVB	SEMTECH	获取价格	Multi-Platform Multi-Phase PWM Controller
SC2647SWTR	SEMTECH	获取价格	Multi-Platform Multi-Phase PWM Controller
SC2647TSTR	SEMTECH	获取价格	Multi-Platform Multi-Phase PWM Controller
SC2647TSTRT	SEMTECH	获取价格	Multi-Platform Multi-Phase PWM Controller
SC2652C2I40	PHILIPS	获取价格	Serial IO/Communication Controller, MOS, CDIP40
SC2655	SEMTECH	获取价格	Programmable Synchronous DC/DC Hysteretic Controller with VRM 9.0 VID Range
SC2655EVB	SEMTECH	获取价格	Programmable Synchronous DC/DC Hysteretic Controller with VRM 9.0 VID Range
SC2655SWTR	SEMTECH	获取价格	Programmable Synchronous DC/DC Hysteretic Controller with VRM 9.0 VID Range
SC2659	SEMTECH	获取价格	Programmable Synchronous DC/DC Hysteretic Controller with VRM 8.5 VID Range

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