This website uses cookies. By using this site, you consent to the use of cookies. For more information, please take a look at our Privacy Policy.

Orders Over

Get a $50 Discount !

UC3843AD 48HRS

Designed for various applications requiring precision control of power output

ISO14001 ISO9001 DUNS

Brands: Texas Instruments

Mfr.Part #: UC3843AD

Datasheet: UC3843AD Datasheet (PDF)

Package/Case: SOIC (D)-14

RoHS Status:

Stock Condition: 8,467 pcs, New Original

Product Type: Power Supply Controllers, Monitors

Warranty: 1 Year Ovaga Warranty - Find Out More


*All prices are in USD

Qty Unit Price Ext Price
1 $3.116 $3.116
200 $1.207 $241.400
500 $1.163 $581.500
1000 $1.143 $1143.000

In Stock: 8,467 PCS

- +

Quick Quote

Please submit RFQ for UC3843AD or email to us: Email: [email protected], we will contact you within 12 hours.

UC3843AD General Description

Boasting adjustable current limiting and a pulse-by-pulse current limiting scheme, the UC3843AD provides comprehensive protection for the power MOSFET and other components against overcurrent conditions. It also features overvoltage protection, thermal shutdown, and undervoltage lockout, enhancing system reliability and safeguarding against potential hazards


  • Real-Time Feedback Control
  • High-Speed Current Sensing > 100kHz
  • Compact Package Size (6-pin SOT23-3)


  • Compact power solution
  • Cost-effective LED driver
  • Precision motor control


Parameter Value Parameter Value
Topology Boost, Buck, Flyback, Forward Control mode Current
Duty cycle (max) (%) 100 Switching frequency (max) (kHz) 500
Features Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Multi-topology UVLO thresholds on/off (V) 8.4/7.6
Operating temperature range (°C) 0 to 70 Rating Catalog
Gate drive (typ) (A) 1


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 UC3843AD is a pulse width modulation (PWM) controller used in switch-mode power supplies. It provides adjustable output voltage regulation and controls the duty cycle of the power transistor to maintain the desired output voltage. The chip is commonly used in various applications including LED drivers, battery chargers, and DC-DC converters.
  • Equivalent

    The UC3843AD chip is part of the UC3843 series of fixed-frequency PWM controllers. Equivalent products include UC3843B, UC2843AD, and UC2843A, which offer similar functionality and are suitable replacements for the UC3843AD in various power supply applications.
  • Features

    The UC3843AD is a high-performance, fixed-frequency current mode controller with advanced protection features. It operates on a voltage range of 7V to 25V, has a 1A totem pole output, and a duty cycle range of 0% to 100%. Additional features include adjustable soft-start, overvoltage protection, and short circuit protection.
  • Pinout

    The UC3843AD is a pulse width modulation (PWM) controller IC. It has 8 pins in total. The pin functions of UC3843AD are: Pin 1 (Output), Pin 2 (Latch), Pin 3 (Internal reference), Pin 4 (Compensation), Pin 5 (Error Amplifier), Pin 6 (Ground), Pin 7 (Soft Start/Shutdown), and Pin 8 (VCC).
  • Manufacturer

    The UC3843AD is manufactured by Texas Instruments (TI). Texas Instruments is a multinational semiconductor company specializing in the design and production of various integrated circuits and semiconductor devices. They offer a wide range of products for various industries including automotive, industrial, personal electronics, and communications.
  • Application Field

    The UC3843AD is a versatile PWM controller commonly used in various power supply applications such as offline and DC-DC converters, battery chargers, and LED drivers. It provides precise control over the switching frequency and duty cycle, ensuring efficient power conversion and regulation.
  • Package

    The UC3843AD chip is packaged in a 14-pin Dual In-Line Package (DIP) form. The package size of the chip is approximately 9.9 mm x 6.6 mm.

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

Ratings and Reviews

Please rate the product !
Please enter a comment

Please submit comments after logging into your account.



  • XC6204B502MR


    torex semiconductor

    **High-performance voltage regulation**: The XC620...

  • LTC2950ITS8-1


    analog devices inc.

    Supervisory circuits

  • EN5311QI-T



    Robust switching regulator design for demanding ap...

  • XC6204B252MR


    torex semiconductor

    XC6204B252MR is a SOT-23-5 packaged linear voltage...

  • KIA7805AF-RTF/P


    KEC Corporation

    Ideal for amplifying audio signals or driving smal...

  • ISPPAC-POWR1208P1-01TN44I



    Compact and powerful ISPPAC-POWR1208P1-01TN44I Lat...