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FAN7621B
PFM Controller for Half-Bridge Resonant Converters
FAN7621B
PFM Controller for Half-Bridge Resonant Converters
Quality Assurance
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All parts procured from our supply chain network undergo a rigorous incoming inspection process. This meticulous inspection ensures that the parts received by our customers are authentic and meet the required standards. Additionally, we maintain detailed records of these inspections to ensure transparency and traceability throughout the supply chain.
Certification
We have successfully obtained various certification standards and have established our own professional testing laboratory. This ensures that every product we supply to our customers meets the highest quality standards. We adhere to strict testing protocols to maintain the consistency and accuracy of our products. To ensure that our products are original and genuine, we also collaborate with reputable third-party testing facilities to conduct rigorous quality testing. Our commitment to quality extends to meeting industry, legal, regulatory, and ISO 9001:2015 requirements.
Shipping & Payment
Shipping & Payment
About Shipping
We generally ship orders within a few business days through reliable shipping carriers such as FedEx, SF, UPS, or DHL. We also have support for other shipping methods. If you would like to inquire about specific shipping details or costs, please don't hesitate to reach out to us.
About Payment
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If you have a specific payment method in mind or would like to inquire about rates and other details, please feel free to contact us.
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Service & Packaging
Service & Packaging
About After Sales Service
All Parts Extended Quality Guarantee
Initiate the application within 90 days from the shipment date.
Confirm the return or exchange with our staff.
Maintain the goods in their original condition as received.
Lastly, please note that the eligibility for return or exchange of goods is subject to an assessment of the actual condition of the returned items. We will evaluate the received goods before finalizing the return or exchange process. If you have any inquiries or require further assistance regarding returns or exchanges, please don't hesitate to contact us at [email protected]
About packaging
Regarding packaging, our products are carefully packed in anti-static bags to provide ESD anti-static protection. The outer packaging is durable with secure closure. We support various packaging methods such as Tape and Reel, Cut Tape, Tube, or Tray.
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FAN7621B DataSheet
Current price plan is under preparation. Please contact our customer service team for the latest pricing information. Thank you for your understanding and support!
Details
The FAN7621B is a pulse frequency modulation controller for high-efficiency half-bridge resonant converters. Offering everything necessary to build a reliable and robust resonant converter, the FAN7621B simplifies designs and improves productivity, while improving performance.Features Variable Frequency Control with 50% Duty Cycle for Half-bridge Resonant Converter Topology High Efficiency through Zero Voltage Switching (ZVS) Fixed Dead Time (350ns) Up to 300kHz Operating Frequency Pulse Skipping for Frequency Limit (Programmable) at Light-Load Condition Remote On/Off Control using CON Pin Protection Functions: Over-Voltage Protection (OVP), Overload Protection (OLP), Over-Current Protection (OCP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown (TSD)
Key Features
- Variable Frequency Control with 50% Duty Cycle for Half-bridge Resonant Converter Topology
- High Efficiency through Zero Voltage Switching (ZVS)
- Fixed Dead Time (350ns)
- Up to 300kHz Operating Frequency
- Pulse Skipping for Frequency Limit (Programmable) at Light-Load Condition
- Remote On/Off Control using CON Pin
- Protection Functions: Over-Voltage Protection (OVP), Overload Protection (OLP), Over-Current Protection (OCP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown (TSD)
Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
| Product Category ! | AC DC Converters, Offline Switchers |
Datasheet PDF
Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.
FAQs
What is FAN7621B?
The FAN7621B is a high-performance, green-mode, pulse width modulation (PWM) controller designed for off-line switched-mode power supplies. It is commonly used in applications such as AC-DC power adapters, chargers, and auxiliary power supplies.
How Does FAN7621B Work?
The FAN7621B works by providing control signals to power switches in a switched-mode power supply, regulating the output voltage based on the input and feedback signals. It incorporates green-mode technology to enhance the efficiency of power conversion and reduce standby power consumption. The controller features comprehensive protection functions to ensure reliable operation of the power supply.
How Many Pins does FAN7621B have and What are the Functions of the Pinout Configuration?
The FAN7621B is housed in an 8-pin DIP (Dual Inline Package) or SOP-8 (Small Outline Package). The pinout configuration includes:
- VCC: Power supply pin.
- FB: Feedback input pin for output voltage regulation.
- CS: Current sense input pin for over current protection.
- RT/CLK: Oscillator frequency setting or soft-start time setting pin.
- DR: Drain connection pin for the external power MOSFET.
- GND: Ground pin.
- SD: Soft-drive supply voltage pin.
- VCCD: Supply voltage for the internal control circuitry pin.
What are the Pros and Cons of FAN7621B?
Pros:
- High Performance: Provides precise control over power supply regulation and efficiency.
- Green-Mode Technology: Enhances energy efficiency and reduces standby power consumption.
- Comprehensive Protection: Incorporates protection functions such as over current protection for enhanced system reliability.
- Versatile Package Options: Available in DIP and SOP package options for flexibility in design and mounting.
- Wide Application Range: Suitable for diverse applications including chargers, power adapters, and auxiliary power supplies.
Cons:
- SOP Package Size: The SOP-8 package may be relatively small and require careful handling during assembly.
- External Component Requirement: May require additional external components such as MOSFETs and passive components for complete power supply design.
Are There Any Equivalents/Alternatives to FAN7621B for Recommendation?
- The FAN7621BMX from Fairchild Semiconductor is a similar alternative to the FAN7621B.
- Alternatives to the FAN7621B include the FSCQ1565RT from Fairchild Semiconductor and the L6561 from STMicroelectronics.
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