中国电子技术网

设为首页 网站地图 加入收藏

 

[原创] Maxim MAX20733高效35A负载电流电源解决方案

关键词:电源管理 DC/DC转换器 MAX20733

时间:2017-04-13 10:37:19       作者:Maxim       来源:中电网

Maxim公司的MAX20733是全集成高效开关稳压器,工作电压从4.5V到16V,负载电流高达35A,峰值效率高达90.8%,具有极好的响应时间,支持负载高达300A/μs瞬态响应,主要用在通信设备,网络设备,服务器和存储器设备,点负载电压稳压器,微处理器芯片组,存储器VDDQ和I/O.本文介绍了MAX20733主要优势和特性,框图,应用电路,以及参考电路图,评估板MAX20733 EVK主要特性,电路图,材料清单和PCB设计图.

The MAX20733 is a fully integrated, highly efficient switching regulator for applications operating from 4.5V to 16V and requiring up to 35A maximum load. This single-chip regulator provides extremely compact, high-efficien­cy power-delivery solutions with high-precision output voltages and excellent transient response for networking, datacom, and telecom equipment.

The IC offers a broad range of programmable features through capacitors and resistors connected to dedicated programming pins. Using this feature, the operation can be optimized for a specific application, reducing the component count- and/or setting-appropriate trade-offs between the regulator’s performance and system cost. Ease of programming enables using the same design for multiple applications.

The MAX20733 includes protection capabilities. Positive and negative cycle-by-cycle overcurrent protection and overtemperature protection ensure a rugged design. Input undervoltage lockout shuts down the device to prevent operation when the input voltage is out of specification. A status pin provides an output signal to show that the out­put voltage is within range and the system is regulating.

MAX20733主要优势和特性:

High Power Density and Low Component Count Overall Solution Size: 509mm2 Including Inductor and Output Capacitors
90.8% Peak Efficiency: VDDH = 12V and VOUT = 1V
Fast Transient Response: Supports Up to 300A/μs Load Step Transients
Optimized Component Performance and Efficiency with Reduced Design-In Time
Increased Power-Supply Reliability with System and IC Self-Protection Features Differential Remote Sense with Open-Circuit Detection
Hiccup Overcurrent Protection
Programmable Thermal Shutdown

MAX20733应用:

Communications Equipment
Networking Equipment
Servers and Storage Equipment
Point-of-Load Voltage Regulators
μP Chipsets
Memory VDDQ
I/O

图1.MAX20733功能框图

图2. MAX20733典型应用电路图

图3. MAX20733参考电路图(VDDH=4.5V-16V,VOUT=1V)

评估板MAX20733 EVK

The MAX20733 Evaluation Kit (EV kit) serves as a reference platform for evaluating the MAX20733 voltage regulator IC. This single-chip, integrated switching regulator provides an extremely compact, low-cost, high­ly efficient, fast, accurate and reliable power delivery solution for emerging low-output voltage applications up to 35A. Refer to the MAX20733 IC data sheet for more information.

The EV kit consists of a fully assembled and tested PCB implementation of the MAX20733. Jumper pins, test points, and input/output connectors are included for flexibility and ease-of-use in a wide range of applications.

The evaluation board is configured with an “edge strip” to allow high di/dt loading when evaluating the system. The +VOUT connection is on the top side, while the return (or -VOUT) is on the bottom side, directly mirroring the top-side strip.

Either solder directly to the output “strip” or use the J8 terminal block to interface to a load.

评估板MAX20733 EVK主要特性:

High Efficiency and Power Density
Low Component Count
Small Solution Size 509mm2 Including Inductor and Output Capacitors
Optimized Performance
Reduced Design-In Time
Proven PCB Layout
Fully Assembled and Tested

图4.评估板MAX20733 EVK电路图(1)

图5.评估板MAX20733 EVK电路图(2)

图6.评估板MAX20733 EVK电路图(3)
评估板MAX20733 EVK材料清单:


图7.评估板MAX20733 EVK PCB设计图(1):顶层

图8.评估板MAX20733 EVK PCB设计图(2):底层

图9.评估板MAX20733 EVK PCB设计图(3):L1层

图10.评估板MAX20733 EVK PCB设计图(4):L2层

图11.评估板MAX20733 EVK PCB设计图(5):L3层

图12.评估板MAX20733 EVK PCB设计图(6):L4层
详情请见:
https://datasheets.maximintegrated.com/en/ds/MAX20733.pdf
https://datasheets.maximintegrated.com/en/ds/MAX20733EVKIT.pdf
MAX20733.pdf
MAX20733EVKIT.pdf

 

猜你喜欢