IR IR3846 35A同步降压转换器解决方案

IR公司的IR3846是单输入(5V-21V) 35A同步全集成高效率容易使用的降压转换器,开关频率从300kHz到1.5MHz可编程,输出电压从0.6V到0.86xPVIN,基准电压精度0.5%,内部集成了数字软起动和智能LDO以提高效率,具有热关断功能,主要用在网络设备,嵌入通信系统,服务器,分布式点负载电源和存储设备.本文介绍了IR3846主要特性IR3846主要特性,框图,典型应用电路和所用材料清单,以及IRDC3846评估板主要特性,电路图和材料清单.
Single-Input Voltage, Synchronous Buck Regulator 35A Highly Integrated SupIR Buck® The IR3846 SupIRBuck® is an easy-to-use, fully integrated and highly efficient DC/DC regulator. The onboard PWM controller and MOSFETs make IR3846 a space-efficient solution, providing accurate power delivery for low output voltage and high current applications.
IR3846 is a versatile regulator which offers programmability of switching frequency and current limit while operating in wide input and output voltage range.
The switching frequency is programmable from 300 kHz to 1.5MHz for an optimum solution.It also features important protection functions, such as Over Voltage Protection (OVP), Pre-Bias startup, hiccup current limit and thermal shutdown to give required system level security in the event of fault conditions.
IR3846主要特性:
 Single 5V to 21V application
 Wide Input Voltage Range from 1.5V to 21V with external Vcc
 Output Voltage Range: 0.6V to 0.86*PVin
 0.5% accurate Reference Voltage
 Enhanced line/load regulation with Feed-Forward
 Programmable Switching Frequency up to 1.5MHz
 Internal Digital Soft-Start
 Enable input with Voltage Monitoring Capability
 Remote Sense Amplifier with True Differential Voltage Sensing
 Thermally compensated current limit and Hiccup Mode Over Current Protection
 Smart LDO to enhance efficiency
 Vp for tracking applications and sequencing
 Vref is available externally to enable margining
 Externa...