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FSDH321 The ON Semiconductor FSDH321 is an integrated offline switch IC designed for flyback converters. It offers a maximum output power of 17W and operates at a frequency of 100kHz.
Mfr Part #:

FSDH321

Available from 1 distributors
Mfr Name: On Semiconductor
On Semiconductor
The ON Semiconductor FSDH321 is an integrated offline switch IC designed for flyback converters. It offers a maximum output power of 17W and operates at a frequency of 100kHz.
✓ Total Stock: 3,000 pcs
$ Price Range: $0.75

FSDH321 Available from 1 distributor

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Components Technology Group, Inc. ✓
Non-Authorised Inventory information
3,000 pcs
On Request
3000 pcs On Request 1 On Request On Request On Request On Request On Request
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

FSDH321 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Duty Cycle
Fault Protection
Frequency
Internal Switch(s)
Mounting Type
Operating Temperature
Operating Voltage
Output Isolation
Power (Watts)
Supplier Device Package
Topology
Voltage
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FSDH321 Description

Short technical summary and product information.

The FSDH321 from ON Semiconductor is an integrated Pulse Width Modulator (PWM) and Sense FET designed for high-performance offline Switch Mode Power Supplies (SMPS). This device combines a high-voltage power switching regulator with an avalanche rugged Sense FET and a current mode PWM control block.

 

Key electrical specifications include an operating frequency of 100kHz, a duty cycle of 67%, and a low operating current of up to 3mA. It supports a wide input voltage range from 8V to 20V and provides fault protection features such as current limiting, overload, over temperature, and over voltage protection. The device is suitable for flyback converter designs, offering isolated output.

 

Packaged in an 8-DIP (0.300", 7.62mm) format, the FSDH321 is designed for through-hole mounting. It operates within a temperature range of -25°C to 85°C (TA). The FSDH321 is specified for applications such as SMPS for STB, low-cost DVD, and auxiliary power for PC adapters and chargers.

FSDH321 Quick Information

Product Type: AC DC Converter, Offline Switch
Canonical Name: FSDH321 Offline Switch Flyback
Subcategory: Offline Switch

FSDH321 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

FSDH321 Estimated Pricing

Qty Low High
1+ $0.75 $0.75

Estimated market price range - modelled values for guidance only, not live distributor offers.

FSDH321 Features

  • Integrated PWM and Sense FET.
  • Designed for offline SMPS.
  • Supports flyback converter designs.
  • Through Hole mounting in 8-DIP.
  • Includes multiple fault protections.

FSDH321 Applications

  • SMPS for Set-Top Boxes.
  • Low-cost DVD power supplies.
  • Auxiliary power for PCs.
  • Charger adapters.

FSDH321 FAQs

6 frequently asked questions generated from this part’s specifications.
What is the operating voltage range of the FSDH321?

8V to 20V.

What package is the FSDH321 available in?

8-DIP (0.300", 7.62mm) through-hole.

What is the operating temperature range of the FSDH321?

-25°C to 85°C.

What is the switching frequency of the FSDH321?

100 kHz.

What fault protections does the FSDH321 include?

Current limiting, over load, over temperature, over voltage.

What is the output power of the FSDH321?

Typical 11W at 230VAC (adapter), maximum 17W at 230VAC (open frame).

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