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SC1214

更新时间： 2024-11-19 04:05:35

品牌	Logo	应用领域
商升特 - SEMTECH		驱动器
页数	文件大小	规格书
8页	170K
描述
High Speed, Combi-SenseTM Two-Phase, Synchronous MOSFET Driver

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SC1214 数据手册

SC1214

High Speed, Combi-Sense^TM

Two-Phase, Synchronous MOSFET Driver

POWER MANAGEMENT

Description

Features

ꢀ High efficiency

ꢀ +12V gate drive voltage

ꢀ High peak drive current

ꢀ Adaptive non-overlapping gate drives provide

shoot-through protection

ꢀ Support Combi-Sense^TMand VID-on-fly operations

ꢀ Fast rise and fall times (15ns typical with 3000pf

load)

ꢀ Ultra-low (<30ns) propagation delay (BG going low)

ꢀ Floating top gate drive

ꢀ Crowbar function for over voltage protection

ꢀ High frequency (to 1.5 MHz) operation allows use

of small inductors and low cost ceramic capacitors

ꢀ Under-voltage-lockout

The SC1214 is a high speed, Combi-Sense^TM, two-phase

driver designed to drive high-side and low-side MOSFETs

in two synchronous Buck converters. The driver com-

bined with Combi-Sense PWM controllers, such as

Semtech SC2643VX or SC2643, provides a cost effec-

tive two-phase voltage regulator for advanced micro-

processors

The Combi-Sense^TMis a technique to sense the inductor

current for peak current mode control of voltage regula-

tor without using sensing resistor. It provides the follow-

ing advantages:

- No costly precision sensing resistor

- Lossless current sensing

- High level noise free signal

- Fast response

ꢀ Low quiescent current

- Suitable for wide range of duty cycle

The detailed explanation of the technique can be found

in the Applications Information section.

A 30ns max propagation delay from input transition to

the gate of the power FET’s guarantees operation at high

switching frequencies. Internal overlap protection circuit

prevents shoot-through from Vin to PGND in the main

and synchronous MOSFETs. The adaptive overlap pro-

tection circuit ensures the bottom FET does not turn on

until the top FET source has reached 1V, to prevent cross-

conduction.

Applications

ꢀ Intel Pentium® processor power supplies

ꢀ AMD Athlon^TMand AMD-K8^TMprocessor power

supplies

ꢀ High current low voltage DC-DC converters

High current drive capability allows fast switching, thus

reducing switching losses at high (up to 1.5MHz) frequen-

cies without causing thermal stress on the driver.

Under-voltage-lockout and over-temperature shutdown

features are included for proper and safe operation.

Timed latches and improved robustness are built into

the housekeeping functions such as the Under Voltage

Lockout and adaptive Shoot-through protection circuitry

to prevent false triggering and to assure safe operation.

The SC1214 is offered in a TSSOP-20 package.

www.semtech.com

May 9, 2005

12 3 4 5 6 7 8

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与SC1214相关器件

型号	品牌	获取价格	描述	数据表
SC1214TSTR	SEMTECH	获取价格	High Speed, Combi-SenseTM Two-Phase, Synchronous MOSFET Driver
SC1214TSTRT	SEMTECH	获取价格	High Speed, Combi-SenseTM Two-Phase, Synchronous MOSFET Driver
SC-12-15J	NEC	获取价格	AC Line FIlters
SC-12-15JH	NEC	获取价格	AC Line FIlters
SC1218	SEMTECH	获取价格	High Speed Synchronous MOSFET Driver
SC1218MLTRT	SEMTECH	获取价格	High Speed Synchronous MOSFET Driver
SC1218STRT	SEMTECH	获取价格	High Speed Synchronous MOSFET Driver
SC121EVB	SEMTECH	获取价格	Low Voltage Synchronous Boost Regulator
SC121NAGTR	SILAN	获取价格	LI+ BATTERY PROTECTION CIRCUIT
SC121NATR	SILAN	获取价格	LI+ BATTERY PROTECTION CIRCUIT

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