Fairchild FDMF6707大电流高效降压电源解决方案

Fairchild公司的FDMF6707是Generation II XS™ DrMOS器件,在6x6mm尺寸内可提供94%的效率,可处理高达50A的大电流,具有三态3.3V PWM输入驱动器,开关频率可高达1MHz,主要用在高性能游戏主板,刀形服务器,V-Core和无V-Core DC/DC转换器,台式计算机和工作站电源,大电流DC/DC POL转换器以及网络和通信微处理器电源.本文介绍了FDMF6707主要特性和优势,方框图, 典型应用框图, 电源损耗测量框图和PCB布局图.

Fairchild Semiconductor’s Generation II XS™ DrMOS Devices Offer 94% Efficiency in 6mm x 6mm Form Factor

The XS™ DrMOS family is Fairchild’s next-generation, fully optimized, ultra-compact, integrated MOSFET plus driver power stage solution for high-current, highfrequency, synchronous buck DC-DC applications. The FDMF6707B integrates a driver IC, two power MOSFETs, and a bootstrap Schottky diode into a thermally enhanced, ultra-compact 6x6mm PQFN package.

With an integrated approach, the complete switching power stage is optimized for driver and MOSFET dynamic performance, system inductance, and power MOSFET RDS(ON). XS™ DrMOS uses Fairchild’s highperformance PowerTrench® MOSFET technology, which dramatically reduces switch ringing, eliminating the snubber circuit in most buck converter applications.

A new driver IC with reduced dead times and propagation delays further enhances performance. A thermal warning function warns of potential overtemperature situations. FDMF6707B also incorporates features such as Skip Mode (SMOD) for improved lightload efficiency, along with a 3-state 3.3V PWM input for compatibility with a wide range of PWM controllers.

FDMF6707优势:

Ultra-Compact 6x6mm PQFN, 72% Space-Saving Compared to Conventional Discrete Solutions

Fully Optimized System Efficiency

Clean Switching Waveforms with Minimal Ringing

High-Current Handling

FDMF6707主要特性:

Over 93% Peak-Efficiency

High-Current Handling of 50A

High-Performance PQFN Copper-Clip Package

3-State 3.3V PWM Input Driver

Skip-Mode SMOD# (Low-Side Gate Turn Off) Input

Thermal Warning Flag for Over-Temperature Condition

Driver Output Disable Function (DISB# Pin)

Internal Pull-Up and Pull-Down for SMOD# and DISB# Inputs, Respectively

Fairchild PowerTrench® Technology MOSFETs for Clean Voltage Waveforms and Reduced Ringing

Fairchild SyncFET™ (Integrated Schottky Diode) Technology in the Low-Side MOSFET

Integrated Bootstrap Schottky Diode

Adaptive Gate Drive Timing for Shoot-through Protection

Under-Voltage Lockout (UVLO)

Optimized for Switching Frequencies up to 1MHz

Low-Profile SMD Package

Fairchild Green Packaging and RoHS Compliant

Based on the Intel® 4.0 DrMOS Standard

FDMF6707应用:

High-Performance Gaming Motherboards

Compact Blade Servers, V-Core and Non-V-Core DC-DC Converters

Desktop Computers, V-Core and Non-V-Core DC-DC Converters

Workstations

High-Current DC-DC Point-of-Load (POL) Converters

Networking and Telecom Microprocessor Voltage Regulators

Small Form-Factor Voltage Regulator Modules

图1.FDMF6707 DrMOS方框图

图2.FDMF6707 DrMOS典型应用框图

图3.FDMF6707 DrMOS电源损耗测量框图

图4.FDMF6707 DrMOS显示VCIN滤波器框图

图5.FDMF6707 DrMOS PCB布局图
详情请见:
http://www.fairchildsemi.com/ds/FD/FDMF6707B.pdf