Products > Integrated Circuits (ICs) > Power Management ICs > E-UC3843BN
  • E-UC3843BN

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High performance current mode PWM controller,Current Mode PWM Controllers 0.5mA Current Mode

  • Package/Case :
  • PDIP-8
  • Product Categories :
  • Current Mode PWM Controllers
  • RoHs Status:
  • Rohs
  • In-stock:
  • 208


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E-UC3843BN Product Details

The E-UC3843BN is a high performance current mode PWM controller in 8 pin DIP package. This PWM controller provides necessary features to implement offline or DC to DC fixed frequency current mode control schemes with minimal external parts count. Internally implemented circuits include a trimmed oscillator for precise duty cycle control, undervoltage lockout featuring start up current less than 0.5mA, precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, PWM comparator provides current limit control and totem pole output stage designed to source or sink high peak current. The output stage is suitable for driving N channel MOSFETs in offstate. The E-UC3843BN can operate to duty cycles approaching 100%.


  • Oscillator frequency guaranteed at 250KHz
  • Current mode operation to 500KHz
  • Automatic feed forward compensation
  • Latching PWM for cycle by cycle current limiting
  • Internally trimmed reference with undervoltage lockout
  • High current totem pole output
  • Undervoltage lockout with hystersis
  • Low start up and operating current
  • Operating junction temperature range from -40°C to 150°C

Technical Parameters

  • Switching Frequency
  • 500 kHz
  • Rise Time
  • 50 ns
  • Fall Time
  • 50 ns
  • Operating Supply Voltage
  • 30 V
  • Number of Outputs
  • 1
  • Maximum Operating Temperature
  • + 150 C
  • Mounting Style
  • Through Hole
  • Package / Case
  • PDIP-8
  • Minimum Operating Temperature
  • - 40 C
  • Output Current
  • 1000 mA
  • Output Voltage
  • 4.90 V to 5.10 V
  • Packaging
  • Tube
  • Factory Pack Quantity
  • 50
  • Topology
  • Boost, Flyback, Forward

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Estimated Delivery Time: Jun 18 - Jun 23 days (choose Expedited at checkout).

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  • $2.00-$3.00 (0.10 KG)
  • 7-30 days

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


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  • 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 E-UC3843BN is the original manufacturer or agent of ST?
We have a professional business development department to strictly test and verify the qualifications of ST original manufacturers and agents. All ST suppliers must pass the qualification review before they can publish their E-UC3843BN devices; we pay more attention to the channels and quality of E-UC3843BN products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of E-UC3843BN chips? Including ST original factory information, Current Mode PWM Controllers application, E-UC3843BN pictures?
You can use Jotrin's intelligent search engine, or filter by Current Mode PWM Controllers category, or find it through STMicroelectronics, Inc Information page.
Q: Are the ST's E-UC3843BN price and stock displayed on the platform accurate?
The ST's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for E-UC3843BN, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
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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.
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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 E-UC3843BN?
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 EUC3843BN we delivered, we will accept the replacement or return of the E-UC3843BN 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 E-UC3843BN.
(3)The E-UC3843BN 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 E-UC3843BN datasheet pdf, E pin diagram?
Need any After-Sales service, please feel free contact us:

STMicroelectronics, Inc

ST Microelectronics is a global independent semiconductor company and a leader in developing and delivering semiconductor solutions across the spectrum of microelectronics applications, and that designs, develops, manufactures and markets a broad spectrum of products....
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