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AC to DC Switching Converter Flyback 7-Pin PDIP-C

Manufacturer : Power Integrations, Inc
Package/Case : DIP-7
Product Categories : PMIC - AC DC Converters, Offline Switchers
Datasheet: TNY278PN Datasheet (PDF)
RoHs Status: Lead free / RoHS Compliant
In-stock: 15000


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TNY278PN Product Details

The TNY278PN is a TinySwitch-III energy-efficient, off-line Switcher with enhanced flexibility and extended power range, incorporates a 700V power MOSFET, oscillator, high voltage switched current source, current limit (user selectable) and thermal shutdown circuitry. The IC family uses an ON/OFF control scheme and offers a design flexible solution with a low system cost and extended power capability.



  • Simple ON/OFF Control, No Loop Compensation Needed
  • Selectable Current Limit Through BP/M Capacitor Value
  • Higher Current Limit Extends Peak Power or, in Open Frame Applications, Maximum Continuous Power
  • Lower-current Limit Improves Efficiency In Enclosed Adapters/Chargers
  • Allows Optimum TinySwitch-III Choice by Swapping Devices with No Other Circuit Redesign
  • Tight I²f Parameter Tolerance Reduces System Cost
  • Maximizes MOSFET and Magnetic Power Delivery
  • Minimizes Max Overload Power, Reducing Cost of Transformer, Primary Clamp and Secondary Components
  • ON-time Extension, Extends Low Line Regulation Range/Hold-up Time to Reduce Input Bulk Capacitance
  • Self-biased - No Bias Winding or Bias Components
  • Frequency Jittering Reduces EMI Filter Costs
  • Pin-out Simplifies Heatsinking to PCB
  • SOURCE Pins are Electrically Quiet for Low EMI
  • Enhanced Safety and Reliability
  • Accurate hysteretic thermal shutdown protection with automatic recovery
  • Improved Auto-restart Delivers <3% of Maximum Power in Short-circuit and Open Loop Fault Conditions
  • Output Overvoltage Shutdown with Optional Zener
  • Line Undervoltage Detect Threshold Set Using a Single Optional Resistor
  • Very Low Component Count Enhances Reliability and Enables Single-sided Printed Circuit Board Layout
  • High Bandwidth Provides Fast Turn On with No Overshoot and Excellent Transient Load Response

TNY278PN Products

Technical Parameters

  • Output Voltage
  • 12 V
  • Input / Supply Voltage (Max)
  • 265 VAC
  • Input / Supply Voltage (Min)
  • 85 VAC
  • Switching Frequency
  • 132 kHz
  • Supply Current
  • 445 uA
  • Operating Temperature Range
  • - 40 C to + 150 C
  • Mounting Style
  • Through Hole
  • Package / Case
  • DIP-8
  • Packaging
  • Tube
  • Number of Outputs
  • 1
  • Output Power
  • 21.5 W
  • Factory Pack Quantity
  • 3000
  • Type
  • Off Line Switcher

TNY278PN Equivalent Parts

For the TNY278PN component, you may consider these replacement and alternative parts.

Models Manufacturer Package/Case Description
TNY278PG POWER DIP-8C AC to DC Switching Converter Off-Line Switcher 140kHz 7Pin PDIP-C

TNY278PN Related Products

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  • **rego***

    alles o.k., vielen dank

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Estimated Delivery Time: Mar 05 - Mar 10 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.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.

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 TNY278PN is the original manufacturer or agent of POWER?
We have a professional business development department to strictly test and verify the qualifications of POWER original manufacturers and agents. All POWER suppliers must pass the qualification review before they can publish their TNY278PN devices; we pay more attention to the channels and quality of TNY278PN products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of TNY278PN chips? Including POWER original factory information, PMIC - AC DC Converters, Offline Switchers application, TNY278PN pictures?
You can use Jotrin's intelligent search engine, or filter by PMIC - AC DC Converters, Offline Switchers category, or find it through Power Integrations, Inc Information page.
Q: Are the POWER's TNY278PN price and stock displayed on the platform accurate?
The POWER's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for TNY278PN, 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 TNY278PN?
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 TNY278PN we delivered, we will accept the replacement or return of the TNY278PN 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 TNY278PN.
(3)The TNY278PN 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 TNY278PN datasheet pdf, TNY278PN pin diagram?
Need any After-Sales service, please feel free contact us:

Power Integrations, Inc

Power Integrations, Inc. is a provider of high performance electronic components for high voltage power conversion systems and is headquartered in Silicon Valley, USA. ICs and diodes help design a compact, energy-efficient AC-DC power supply for a wide range of electronic products, including televis...
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