Products > Integrated Circuits (ICs) > Power Management ICs > TOP234YN

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Power Management IC, Off Line Switcher, 265 VAC, TO-220-5

  • Package/Case :
  • TO-220
  • Product Categories :
  • AC/DC Switching Converters
  • RoHs Status:
  • Rohs
  • In-stock:
  • 300


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TOP234YN Product Details

The TOP234YN is a design flexible, EcoSmart®, Integrated Off-line Switcher with 45W open frame at 85 to 265VAC. TOPSwitch-FX uses the proven TOPSwitch topology and cost effectively integrates many new functions that reduce system cost and at the same time, improve design flexibility, performance and energy efficiency. Like TOPSwitch, the high voltage power MOSFET, PWM control, fault protection and other control circuitry are all integrated onto a single CMOS chip, but with two added terminals. The first one is a MULTIFUNCTION (M) pin, which implements programmable line OV/UV shutdown and line feed forward/DC (max) reduction with line voltage. The same pin can be used instead to externally set an accurate current limit. In either case, this pin can also be used for remote ON/OFF or to synchronize the oscillator to an external, lower frequency signal.



  • Fully integrated soft-start for minimum stress/overshoot
  • Externally settable accurate current limit
  • Wider duty cycle for more power, smaller input capacitor
  • No turn off glitches line under-voltage (UV) detection
  • Line over voltage (OV) shutdown extends line surge limit
  • Regulates to zero load without dummy loading
  • 132kHz Frequency reduces transformer/power supply size
  • Half frequency option for video applications
  • Hysteretic thermal shutdown for automatic recovery
  • Large thermal hysteresis prevents PC board over heating
  • Synchronizable to a lower frequency
  • Cycle skipping reduces no-load consumption
  • Reduced consumption in remote off mode
  • Allows shutdown/wake-up via LAN/input port

TOP234YN 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
  • 1.5 mA
  • Operating Temperature Range
  • - 40 C to + 150 C
  • Mounting Style
  • Through Hole
  • Package / Case
  • TO-220
  • Packaging
  • Tube
  • Factory Pack Quantity
  • 50
  • Type
  • Off Line Switcher

TOP234YN Related Products

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Shipping More
Estimated Delivery Time: Aug 05 - Aug 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.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 TOP234YN 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 TOP234YN devices; we pay more attention to the channels and quality of TOP234YN products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of TOP234YN chips? Including POWER original factory information, AC/DC Switching Converters application, TOP234YN pictures?
You can use Jotrin's intelligent search engine, or filter by AC/DC Switching Converters category, or find it through Power Integrations, Inc Information page.
Q: Are the POWER's TOP234YN 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 TOP234YN, 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 TOP234YN?
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 TOP234YN we delivered, we will accept the replacement or return of the TOP234YN 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 TOP234YN.
(3)The TOP234YN 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 TOP234YN datasheet pdf, TOP234YN 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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