On Semi FAN65005A65V 8A PWM降压电源解决方案介绍-电子发烧友网

On Semi公司的FAN65005A是高性能65V/8A电压模式同步PWM降压稳压器，集成了高边和低边功率MOSFET，支持电压从4.5V到65V，处理连续电流高达8A.器件还包括高性能PowerTrenchR MOSFET，控制器和驱动器，0.67%精度基准电压0.6V，开关频率从100kHz到1MHz可编程，高性能6 mm x 6 mm PQFN封装，主要用在高压POL模块，通信基站电源，网络计算，电池管理系统和USB-PD以及工业自动化，电动工具和老虎机（赌具）。本文介绍了FAN65005A主要特性，应用电路以及65V/8A电压模式PWM降压稳压器评估板FAN65005A-GEVB主要特性和指标，电路图，材料清单和PCB设计图。

FAN65005A is a wide VIN highly efficient synchronous buckregulator， with integrated high side and low side power MOSFETs.

The device incorporates a fixed frequency voltage mode PWMcontroller supporting a wide voltage range from 4.5 V to 65 V and canhandle continuous currents up to 8 A.

FAN65005A includes a 0.67% accurate reference voltage to achievetight regulation. The switching frequency can be programmed from100 kHz to 1 MHz. To improve efficiency at light load condition， thedevice can be set to discontinuous conduction mode with pulseskipping operation.

FAN65005A has dual LDOs to minimize power loss and integratedcurrent sense circuit that provides cycle−by−cycle current limiting.

This single phase buck regulator offers complete protection featuresincluding Over current protection， Thermal shutdown， Under−voltagelockout， Over voltage protection， Under voltage protection andShort−circuit protection.

FAN65005A uses ON Semiconductor’s high performancePowerTrenchR MOSFETs that reduces ringing in switchingapplications. FAN65005A integrates the controller， driver， and powerMOSFETs into a thermally enhanced， compact 6 x 6 mm PQFNpackage. With an integrated approach， the complete DC/DC converteris optimized from the controller and driver to MOSFET switchingperformance， delivering a high power density solution.

• Wide Input Voltage Range： 4.5 V to 65 V

• Continuous Output Current： 8 A

• Fixed Frequency Voltage Mode PWM Control with Input VoltageFeed−forward

• 0.6 V Reference Voltage with 0.67% Accuracy

• Adjustable Switching Frequency： 100 kHz to 1 MHz

• Dual LDOs for Single Supply Operation and to ReducePower Loss

• Selectable CCM PWM Mode or PFM Mode for LightLoads

• External Compensation for Wide Operation Range

• Adjustable Soft−Start & Pre−Bias Startup

• Enable Function with Adjustable Input VoltageUnder−Voltage−Lock−Out （UVLO）

• Power Good Indicator

• Over Current Protection， Thermal Shutdown， OverVoltage Protection， Under Voltage Protection andShort−circuit Protection

• High Performance Low Profile 6 mm x 6 mm PQFNPackage

• This Device is Pb−Free and RoHS Compliant

FAN65005A应用：

• High Voltage POL Module

• Telecommunications： Base Station Power Supplies

• Networking： Computing， Battery ManagementSystems， USB−PD

• Industrial Equipment： Automation， Power Tools， SlotMachines

On Semi FAN65005A65V 8A PWM降压电源解决方案介绍

图1.FAN65005A框图

On Semi FAN65005A65V 8A PWM降压电源解决方案介绍

图2.FAN65005A应用电路图

High Performance 65_V， 8_A Voltage Mode Synchronous PWM Buck RegulatorEvaluation Board FAN65005A is a wide VIN highly efficient synchronous buckregulator， with integrated high side and low side power MOSFETs.

The device incorporates a fixed frequency voltage mode PWMcontroller supporting a wide voltage range from 4.5 V to 65 V and canhandle continuous currents up to 8 A.

FAN65005A has dual LDOs to minimize power loss and integratedcurrent sense circuit that provides cycle-by-cycle current limiting.

This single phase buck regulator offers complete protection featuresincluding Over current protection， Thermal shutdown， Under-voltagelockout， Over voltage protection， Under voltage protection andShort-circuit protection.

FAN65005A uses ON Semiconductor’s high performancePOWERTRENCHR MOSFETs that reduces ringing in switchingapplications. FAN65005A integrates the controller， driver， and powerMOSFETs into a thermally enhanced， compact 6 × 6 mm PQFNpackage. With an integrated approach， the complete DC/DC converteris optimized from the controller and driver to MOSFET switchingperformance， delivering a high power density solution.

图3.FAN65005A-GEVB评估板外形图

FAN65005A-GEVB评估板性能指标：

On Semi FAN65005A65V 8A PWM降压电源解决方案介绍