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UC3843BN 48HRS


ISO14001 ISO9001 DUNS

Brands: Stmicroelectronics

Mfr.Part #: UC3843BN

Datasheet: UC3843BN Datasheet (PDF)

Package/Case: DIP-8

RoHS Status:

Stock Condition: 9,458 pcs, New Original

Product Type: DC DC Switching Controllers

Warranty: 1 Year Ovaga Warranty - Find Out More


*All prices are in USD

Qty Unit Price Ext Price
1 $0.318 $0.318
10 $0.260 $2.600
50 $0.234 $11.700
100 $0.203 $20.300
500 $0.170 $85.000
1000 $0.162 $162.000

In Stock: 9,458 PCS

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Quick Quote

Please submit RFQ for UC3843BN or email to us: Email: [email protected], we will contact you within 12 hours.

UC3843BN General Description

With a minimal external parts count required, the UC3843BN is a cost-effective solution for power control applications. Its low off-state output stage, compatibility with N-Channel MOSFETs, and start-up current of less than 0.5mA make it a reliable choice for various power management systems




  • UC3843BN for power supplies
  • Efficient UC3843BN usage
  • UC3843BN in DC-DC converters


Parameter Value Parameter Value
Packing Type Tube RoHs compliant Ecopack2
Grade Industrial


Shipping Type Ship Fee Lead Time
DHL DHL $20.00-$40.00 (0.50 KG) 2-5 days
Fedex Fedex $20.00-$40.00 (0.50 KG) 2-5 days
UPS UPS $20.00-$40.00 (0.50 KG) 2-5 days
TNT TNT $20.00-$40.00 (0.50 KG) 2-5 days
EMS EMS $20.00-$40.00 (0.50 KG) 2-5 days
REGISTERED AIR MAIL REGISTERED AIR MAIL $20.00-$40.00 (0.50 KG) 2-5 days

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


Terms of payment Hand Fee
Wire Transfer Wire Transfer charge US$30.00 banking fee.
Paypal Paypal charge 4.5% service fee.
Credit Card Credit Card charge 3.5% service fee.
Western Union Western Union charge US.00 banking fee.
Money Gram Money Gram charge US$0.00 banking fee.


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.


  • Product

    Step1 :Product

  • Vacuum packaging

    Step2 :Vacuum packaging

  • Anti-static bag

    Step3 :Anti-static bag

  • Individual packaging

    Step4 :Individual packaging

  • Packaging boxes

    Step5 :Packaging boxes

  • 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.

  • ESD
  • ESD

Part points

  • The UC3843BN is a pulse width modulation (PWM) controller IC commonly used in power supply and motor control applications. It provides precise control of the output voltage by adjusting the duty cycle of the PWM signal. The UC3843BN can operate at frequencies up to 500 kHz and has built-in features such as overcurrent protection and soft start functionality.
  • Equivalent

    Equivalent products of UC3843BN chip include UC3843A, UC3843B, UC3843D, and TL3843P. These chips are all high performance current mode PWM controller ICs commonly used in switch-mode power supply applications.
  • Features

    1. Current mode control for constant frequency operation 2. Adjustable soft-start function to reduce stress on power supply components 3. Precision voltage reference 4. Pulse-by-pulse current limiting 5. Undervoltage lockout for reliable start-up operation 6. Overtemperature protection for thermal shutdown 7. Low startup and operating current for energy efficiency
  • Pinout

    UC3843BN is an 8-pin integrated circuit in dual in-line package (DIP). Pin 1 is for oscillator timing capacitor, Pin 2 is for oscillator timing resistor, Pin 3 is ground, Pin 4 is feedback input, Pin 5 is error amplifier output, Pin 6 is Vcc, Pin 7 is output, and Pin 8 is oscillator output.
  • Manufacturer

    UC3843BN is manufactured by Texas Instruments, a leading global semiconductor company that designs, manufactures, and sells a wide range of analog and digital integrated circuits for various applications. Texas Instruments is known for its high-quality products, innovation, and commitment to sustainability and corporate responsibility.
  • Application Field

    UC3843BN is commonly used in applications such as power supplies, voltage regulators, DC-DC converters, and battery chargers. It is also suitable for offline and flyback power supplies in various electronic devices and systems.
  • Package

    The UC3843BN is a through-hole package type IC chip in a 8-DIP form (Dual Inline Package) with a standard body size of 0.3 inches wide and 0.3 inches long.

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

  • Product

    We have rich products, can meet your various needs.

  • quantity

    Minimum order quantity starts from 1pcs.

  • shipping

    Lowest international shipping fee starts from $0.00

  • guarantee

    365 days quality guarantee for all products

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