Products > Integrated Circuits (ICs) > Power Management ICs > FSQ0370RNA

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Power Switch ICs - Power Distribution SMPS Grn Pwr Switch 3A 700V

  • Package/Case :
  • PDIP-8
  • Product Categories :
  • Power Switch ICs - Power Distribution
  • RoHs Status:
  • Lead free / RoHS Compliant
  • In-stock:
  • 17651


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FSQ0370RNA Product Details


The FSQ0370 consists of an integrated Current Mode Pulse Width Modulator(PWM) and an avalanche rugged 700V SenseFET. It is specifically designed for high-performance ofline Switched Mode Power Supplies
(SMPS) with minimal external components. The integrated PWM controller features include:a fixed-
frequency generating oscillator, Under-Voltage Lockout (UVLO) protection, Leading-Edge Blanking (LEB), an optimized gate turn-on /turn-off driver, Thermal Shutdown (TSD) protection, and temperature-compensated precision current sources for loop compensation and fault protection circuitry.
Compared to a discrete MOSFET and controller or RCC switching converter solution, the FSQ0370 reduces total component count, design size, and weight while increasing efficiency, productivity, and system reliability.These devices provide a basic platform that is well suited for the design of cost-effective flyback converters, such as in PC auxiliary power supplies.
· Internal Avalanche Rugged 700V SenseFET
· Consumes Only 0.8W at 230VAc& 0.5W Load with Burst-Mode Operation
· Precision Fixed Operating Frequency:100kHz Internal Startup Circuit and Built-in Soft-Start
· Pulse-by-Pulse Current Limiting, Auto-Restart Mode
· Over-Voltage Protection (OVP), Overload Protection(OLP), Internal Thermal Shutdown Function(TSD)
· Under-Voltage Lockout (UVLO)
· Low Operating Current:3mA
· Adjustable Peak Current Limit 

· Auxiliary Power Supply for PC and Server· SMPS for VCR, SVR, STB, DVD, and DVCD Player
· Printer, Facsimile, and Scanner
· Adapter for Camcorder


FSQ0370RNA Pinout
(Picture: Pinout)

FSQ0370RNA Block Diagram
(Picture: Diagram)

Technical Parameters

  • Number of Outputs
  • 1
  • On Resistance (Max)
  • 4 Ohms
  • Supply Current (Max)
  • 3 mA
  • Maximum Operating Temperature
  • + 85 C
  • Mounting Style
  • Through Hole
  • Package / Case
  • PDIP-8
  • Maximum Power Dissipation
  • 1500 mW
  • Minimum Operating Temperature
  • - 25 C
  • Output Current
  • 0.97 A
  • Packaging
  • Tube
  • Factory Pack Quantity
  • 50

FSQ0370RNA Related Products

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  • **ohan***

    Schneller Versand, vielen Dank+++

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Estimated Delivery Time: Sep 27 - Oct 02 days (choose Expedited at checkout).

Shipping & Payment


  • Shipping Type
  • Ship Fee
  • Lead Time
  • $20.00-$40.00 (0.50 KG)
  • 2-5 days
  • $20.00-$40.00 (0.50 KG)
  • 3-7 days
  • $20.00-$45.00 (0.50 KG)
  • 2-5 days
  • $25.00-$65.00 (0.50 KG)
  • 2-5 days
  • $25.00-$45.00 (0.50 KG)
  • 5-14 days
  • $2.00-$3.00 (0.10 KG)
  • 7-30 days

Processing Time:Shipping fee depend on different zone and country.


  • Terms of payment
  • Hand Fee
  • Payment Site
  • charge US$30.00 banking fee.
  • charge 4.0% service fee.
  • charge 3.5% service fee.
  • charge US$0.00 banking fee.
  • charge US$0.00 banking fee.

We provide high quality products, thoughtful service and after sale guarantee

  • We have rich products, can meet your various needs.

    We have rich products, can meet your various needs.

  • Minimum order quantity starts from 1pcs.

    Minimum order quantity starts from 1pcs.

  • Lowest international shipping fee starts from US$2.00.

    Lowest international shipping fee starts from US$2.00.

  • 90 days quality guarantee for all products.

    90 days quality guarantee for all products.


  • Step1:Product

    Step1: Products

  • Step2:Vacuum packaging

    Step2: Vacuum Packaging

  • Step3:Anti-static bag

    Step3: Anti-Static Bag

  • Step4:Individual packaging

    Step4: Individual Packaging

  • Step5:Packaging boxes

    Step5: Packaging Boxes

  • Step6:bar-code shipping tag

    Step6: Bar-Code Shipping Tag

All the products will packing in anti-staticbag. Ship with ESD antistatic protection.

Outside ESD packing’s lable will use ourcompany’s information: Part Mumber, Brand and Quantity.

We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.

After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.

Jotrin ESD packing


1.We provide 90 days warranty.

2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.


Q: How does Jotrin guarantee that FSQ0370RNA is the original manufacturer or agent of ON?
We have a professional business development department to strictly test and verify the qualifications of ON original manufacturers and agents. All ON suppliers must pass the qualification review before they can publish their FSQ0370RNA devices; we pay more attention to the channels and quality of FSQ0370RNA products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of FSQ0370RNA chips? Including ON original factory information, Power Switch ICs - Power Distribution application, FSQ0370RNA pictures?
You can use Jotrin's intelligent search engine, or filter by Power Switch ICs - Power Distribution category, or find it through ON Semiconductor, LLC Information page.
Q: Are the ON's FSQ0370RNA price and stock displayed on the platform accurate?
The ON's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for FSQ0370RNA, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
Q: Can I place an order offline?
Yes. We accept offline orders.
We can provide order placement service. You only need to log in, click "My Orders" to enter the transaction management, and you will see the "Order Details" interface. After checking it, select all and click "Place Order". In addition, you can enjoy coupons or other selected gifts when placing orders online.
Q: What forms of payment can I use in Jotrin?
TT Bank, Paypal, Credit Card, Western Union, and Escrow is all acceptable.
Q: How is the shipping arranged and track my package?
Customers can choose industry-leading freight companies, including DHL, FedEx, UPS, TNT, and Registered Mail.
Once your order has been processed for shipment, our sales will send you an e-mail advising you of the shipping status and tracking number.
Note: It may take up to 24 hours before carriers will display tracking information. In normal conditions, Express delivery needs 3-5 days, Registered Mail needs 25-60 days.
Q: What is the process for returns or replacement of FSQ0370RNA?
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 FSQ0370RNA we delivered, we will accept the replacement or return of the FSQ0370RNA 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 FSQ0370RNA.
(3)The FSQ0370RNA 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
More details about return electronic components please see our Return & Change Policy.
Q: How to contact us and get support, such as FSQ0370RNA datasheet pdf, FSQ0370RNA pin diagram?
Need any After-Sales service, please feel free contact us:

ON Semiconductor, LLC

ON Semiconductor is a technology innovation enabler in energy-efficient electronics that enables design engineers to reduce global energy use. The company offers a comprehensive portfolio of energy efficient power and signal management, logic, discrete and custom solutions to help customers solve...
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