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SC1214

SC1214

  • 厂商:

    SEMTECH

  • 封装:

  • 描述:

    SC1214 - High Speed, Combi-SenseTM Two-Phase, Synchronous MOSFET Driver - Semtech Corporation

  • 详情介绍
  • 数据手册
  • 价格&库存
SC1214 数据手册
High Speed, Combi-SenseTM Two-Phase, Synchronous MOSFET Driver POWER MANAGEMENT Description The SC1214 is a high speed, Combi-SenseTM, two-phase driver designed to drive high-side and low-side MOSFETs in two synchronous Buck converters. The driver combined with Combi-Sense PWM controllers, such as Semtech SC2643VX or SC2643, provides a cost effective two-phase voltage regulator for advanced microprocessors The Combi-SenseTM is a technique to sense the inductor current for peak current mode control of voltage regulator without using sensing resistor. It provides the following advantages: - No costly precision sensing resistor - Lossless current sensing - High level noise free signal - Fast response - 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 protection circuit ensures the bottom FET does not turn on until the top FET source has reached 1V, to prevent crossconduction. High current drive capability allows fast switching, thus reducing switching losses at high (up to 1.5MHz) frequencies 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. SC1214 Features u u u u u u u u u u u u High efficiency +12V gate drive voltage High peak drive current Adaptive non-overlapping gate drives provide shoot-through protection Support Combi-SenseTM and VID-on-fly operations Fast rise and fall times (15ns typical with 3000pf load) Ultra-low (
SC1214
物料型号: - 型号为SC1214,由SEMTECH公司生产。

器件简介: - SC1214是一款高速、Combi-Sense™技术的两相同步MOSFET驱动器,设计用于在两个同步降压转换器中驱动高侧和低侧MOSFETs。该驱动器与Combi-Sense PWM控制器(如Semtech SC2643VX或SC2643)结合使用,为先进微处理器提供成本效益高的两相电压调节器。

引脚分配: - TG1, TG2(2,12脚):用于开关(顶部)MOSFET的输出门驱动。 - DRN1, DRN2(1,11脚):同步降压转换器的功率相节点(或开关节点)。 - BST1, BST2(3,13脚):自举引脚,BST和DRN引脚之间连接电容器以产生高侧MOSFET的浮动自举电压。 - VREG1, VREG2(18,8脚):LDO输出,与1F至4.7uF(陶瓷)去耦。 - CO1, CO2(4,14脚):由外部控制器提供的逻辑电平PWM输入信号至SC1214。 - VPN1, VPN2(16,6脚):虚拟相节点,连接RC以启用Combi-Sense™操作。 - PGND(10,20脚):接地,保持这些引脚靠近同步MOSFETs源极。 - BG1, BG2(19,9脚):用于同步(底部)MOSFET的输出门驱动。 - VIN1, VIN2(17,7脚):低门驱动、LDO和内部Combi-Sense™电路的供电电源。

参数特性: - 支持+12V门驱动电压、高峰值驱动电流、自适应非重叠门驱动提供直通保护、支持Combi-Sense™和VID-on-fly操作、快速上升和下降时间(15ns典型值)、超低传播延迟(<30ns)、浮顶门驱动、防反电压保护、高达1.5MHz的高频操作、欠压锁定和过温关闭功能。

功能详解: - Combi-Sense™技术用于无需使用感测电阻的情况下感测电感器电流,实现电压调节器的峰值电流模式控制,具有无需昂贵的精密感测电阻、无损电流感测、高级别无噪声信号、快速响应等优点。

应用信息: - 适用于Intel Pentium®处理器电源、AMD Athlon™和AMD-K8TM处理器电源、大电流低电压DC-DC转换器。
SC1214 价格&库存

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