On Semi's FAN65005A is a high-performance 65V/8A voltage-mode synchronous PWM buck regulator. It integrates high-side and low-side power MOSFETs. It supports voltages from 4.5V to 65V and can handle continuous currents up to 8A. The device also includes high-performance PowerTrenchR MOSFET, controller and driver, 0.67% accuracy reference voltage 0.6V, programmable switching frequency from 100kHz to 1MHz, high-performance 6 mm x 6 mm PQFN package, mainly used in high-voltage POL modules, communication base station power supplies, network computing, and batteries Management system and USB-PD and industrial automation, power tools and slot machines (gambling equipment). This article introduces the main features and application circuits of FAN65005A, as well as the main features and specifications of the 65V/8A voltage mode PWM step-down regulator evaluation board FAN65005A-GEVB, circuit diagrams, bill of materials and PCB design drawings.
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 from 100 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 integrated current sense circuit that provides cycle−by−cycle current limiting.
This single phase buck regulator offers complete protection features including Over current protection, Thermal shutdown, Under−voltagelockout, Over voltage protection, Under voltage protection and Short−circuit protection.
• 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 and Short−circuit Protection
• High Performance Low Profile 6 mm x 6 mm PQFNPackage
• This Device is Pb−Free and RoHS Compliant
FAN65005A application:
• High Voltage POL Module
• Telecommunications: Base Station Power Supplies
• Networking: Computing, Battery ManagementSystems, USB−PD
• Industrial Equipment: Automation, Power Tools, SlotMachines
Figure 1. Block diagram of FAN65005A
Figure 2. FAN65005A application circuit diagram
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 includes a 0.67% accurate reference voltage to achievetight regulation. The switching frequency can be programmed from 100 kHz to 1 MHz. To improve efficiency at light load condition, thedevice can be set to discontinuous conduction mode with pulse skipping operation.
FAN65005A has dual LDOs to minimize power loss and integrated current sense circuit that provides cycle-by-cycle current limiting.
This single phase buck regulator offers complete protection features including Over current protection, Thermal shutdown, Under-voltagelockout, Over voltage protection, Under voltage protection and Short-circuit protection.
FAN65005A uses ON Semiconductor's high performance POWERTRENCHR MOSFETs that reduces ringing in switching applications. FAN65005A integrates the controller, driver, and powerMOSFETs into a thermally enhanced, compact 6 × 6 mm PQFNpackage. With an integrated approach, the complete DC/DC converter is optimized from the controller and driver to MOSFET switchingperformance, delivering a high power density solution.
Figure 3. Outline drawing of FAN65005A-GEVB evaluation board
FAN65005A-GEVB evaluation board performance indicators:
Figure 4. FAN65005A-GEVB evaluation board circuit diagram
FAN65005A-GEVB evaluation board material list:
Figure 5. FAN65005A-GEVB evaluation board PCB design diagram (1): Left: top layer; right: bottom layer
Figure 6. PCB design drawing of FAN65005A-GEVB evaluation board (2): Left: inner layer 1; right: inner layer 2
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