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Name: FSDH321Z
Brand: ON Semiconductor
SKU: FSDH321Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Any Feature, including a modified Existing Feature, that is not an Existing Feature.

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ON Semiconductor FSDH321Z

Part No.:: FSDH321Z

Manufacturer:: ON Semiconductor

Package:: 8-DIP (0.300, 7.62mm)

Datasheet:

Description:: IC OFFLINE SWITCH FLYBACK 8DIP

In Stock:: 3074

Quantity:: Add To Cart

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FSDH321Z Specifications

Packaging:
Bag
Series:
FPS™
ProductStatus:
Obsolete
OutputIsolation:
Isolated
InternalSwitch(s):
Yes
Voltage-Breakdown:
650V
Topology:
Flyback
Voltage-StartUp:
12 V
Voltage-Supply(Vcc/Vdd):
8V ~ 20V
DutyCycle:
67%
Frequency-Switching:
100kHz
Power(Watts):
17 W
FaultProtection:
Current Limiting, Over Load, Over Temperature, Over Voltage
ControlFeatures:
-
OperatingTemperature:
-25°C ~ 85°C (TA)

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FSDH321Z information

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FSDH321Z Typical application Circuitry

FSDH321Z

The FSDH321Z is part of the Fairchild Semiconductor's FSDH series, characterized by its integrated Power Switch (FPS) devices for high-efficiency power supplies. This series is particularly designed for switch-mode power supplies (SMPS) with a focus on low power consumption and compact design, making it suitable for a wide range of applications such as adapters, chargers, and standby power systems. The FSDH321Z integrates a PWM (Pulse Width Modulation) controller and a high-voltage MOSFET in a single package, optimizing efficiency and reducing component count in power supply designs.

1. Integrated Power Switch Design: At the heart of the FSDH321Z's operation is its integration of a PWM controller with a high-voltage MOSFET, streamlining the design of switch-mode power supplies by minimizing the need for external components. This integration is essential for achieving efficient power conversion, reducing standby power consumption, and enhancing the overall reliability of the power supply.

2. Pin Configuration for Efficient SMPS Design: The FSDH321Z is designed with a concise pin layout to support its functionality within an SMPS circuit. Key pins typically include the Drain (D) pin connected directly to the high-voltage input, the Source (S) pin serving as the system ground and reference for the internal controller, and a Feedback (FB) pin used for output voltage regulation via closed-loop control. The device may also feature a Vcc pin for powering the internal controller circuitry.

3. Power Supply Connection and Voltage Regulation: To ensure optimal performance, the FSDH321Z requires a stable Vcc supply to power the internal PWM controller, with the voltage level maintained within the device's specified range. The Feedback pin plays a crucial role in regulating the output voltage by sampling a portion of the output and feeding it back to the controller, enabling precise adjustment of the duty cycle to maintain stable output voltage under varying load conditions.

4. High-Voltage MOSFET Switching and Circuit Topology: The integrated high-voltage MOSFET's Drain pin should be connected to the primary side of the SMPS transformer, facilitating the PWM-controlled switching necessary for voltage conversion. The selection of an SMPS topology, such as flyback or forward converter, will influence the detailed circuit configuration, including the transformer design, rectification stage, and output filtering components.

5. Thermal Management for Device Stability: Given the power handling capabilities of the FSDH321Z, effective thermal management is critical. Adequate heat sinking for the MOSFET, coupled with thoughtful PCB layout to optimize heat dissipation, is vital for maintaining the device within its safe operating temperature range, thus ensuring reliable and long-term operation.

6. Integration into Power Supply Circuits: Incorporating the FSDH321Z into a power supply design involves considering additional circuit elements such as input rectifiers, output capacitors for filtering, and protection features like overvoltage, overcurrent, and thermal shutdown, which are often built into the FSDH series devices. These elements are crucial for safeguarding the power supply and the powered device against abnormal operating conditions.

In summary, the FSDH321Z is a sophisticated integrated Power Switch from Fairchild Semiconductor's FSDH series, tailored for compact and efficient switch-mode power supplies. Implementing this device in a power supply design entails a comprehensive understanding of its pin functions, proper power supply provisioning, meticulous voltage regulation through feedback control, strategic MOSFET switching with appropriate SMPS topology, diligent thermal management, and the inclusion of necessary circuit protection mechanisms. By following these guidelines, designers can effectively leverage the FSDH321Z to create high-efficiency power supplies for a variety of applications.

FSDH321Z FAQ

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6. What is the process for return or replacement of FSDH321Z?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the FSDH321Z we delivered, we will accept the replacement or return of the FSDH321Z only when all of the below conditions are fulfilled:

(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of FSDH321Z.

(3)The PartNo is unused and only in the original unpacked packaging.

Two processes to return the products:

(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations