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| BD9A600MUV 6A同步降压转换器解决方案 |
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| 文章来源： 更新时间：2015/6/2 9:12:00 |
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ROHM公司的BD9A600MUV是2.7V-5.5V输入输出6A的集成低导通电阻MOSFET同步降压DC/DC转换器,采用简单轻负载模式(SLIMTM)控制,输出电压从0.8V 到VPVIN x 0.7V,开关频率1MHz,主要用在DSP,FPGA,微处理器等电源,平板电脑/服务器电源,LCDTV,打印机,OA设备和娱乐设备等.本文介绍了BD9A600MUV主要特性,框图,应用电路及其推荐元件数值,降压DC/DC转换器BD9A600MUV评估板电路图,材料清单和PCB设计文件图.
BD9A600MUV is a synchronous buck switchingregulator with built-in low on-resistance power MOSFETs.It is capable of providing current up to 6A.The SLLMTMcontrol provides excellent efficiency characteristics inlight-load conditions which make the product ideal forequipment and devices that demand minimal standbypower consumption. The oscillating frequency is high at1MHz using a small value of inductance. It is a currentmode control DC/DC converter and features high-speedtransient response. Phase compensation can also be seteasily.
BD9A600MUV主要特性:
Synchronous Single DC/DC Converter.
SLLMTM (Simple Light Load Mode)Control.
Over Current Protection.
Short Circuit Protection.
Thermal Shutdown Protection.
Under Voltage Lockout Protection.
Adjustable Soft start Function.
Power Good Output.
VQFN016V3030 Package(Backside HeatDissipation)
BD9A600MUV主要指标:
Input Voltage Range：2.7V to 5.5V
Output Voltage Range：0.8V to VPVIN x 0.7V
Average Output Current：6A(Max)
Switching Frequency：1MHz(Typ)
High-Side MOSFET On-Resistance：25mΩ(Typ)
Low-Side MOSFET On-Resistance：25mΩ(Typ)
Standby Current：0μA(Typ)
BD9A600MUV应用:
Step-down Power Supply for DSPs,FPGAs, Microprocessors, etc.
Laptop PCs/ Tablet PCs/ Servers.
LCD TVs.
Storage Devices (HDDs/SSDs).
Printers, OA Equipment.
Entertainment Devices.
Distributed Power Supply, Secondary PowerSupply.
图1.BD9A600MUV框图
图2.BD9A600MUV典型应用电路图
推荐元件数值(VIN = 5V):
推荐元件数值(VIN = 3.3V):
降压DC/DC转换器BD9A600MUV评估板
This evaluation board has been developed for ROHM’s synchronous buck DC/DC converter customers evaluatingBD9A600MUV. While accepting a power supply of 2.7-5.5V, an output of 1.8V can be produced. The IC has internal 25mΩhigh-side N-channel MOSFET and 25mΩ low-side N-channel MOSFET and a synchronization frequency is of 1MHz. ASoft Start circuit prevents in-rush current during startup. An EN pin allows for simple ON/OFF control of the IC to reducestandby current consumption. A MODE pin allows the user to select fixed frequency PWM mode or enables the Deep-SLLMcontrol and the mode is automatically switched between the Deep-SLLM control and fixed frequency PWM mode. IncludeOCP (Over Current Protection) and SCP (Short Circuit Protection).
图3.BD9A600MUV-EVK-001评估板外形图
图4.BD9A600MUV-EVK-001评估板电路图
BD9A600MUV-EVK-001评估板材料清单:
图5.BD9A600MUV-EVK-001评估板PCB元件布局图(顶层)
图6.BD9A600MUV-EVK-001评估板PCB元件布局和丝印图(顶层)
图7.BD9A600MUV-EVK-001评估板PCB设计图(L1层)
图8.BD9A600MUV-EVK-001评估板PCB设计图(L2层)
图9.BD9A600MUV-EVK-001评估板PCB设计图(L3层)
图10.BD9A600MUV-EVK-001评估板PCB设计图(底层)
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