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UC3843DTR The Texas Instruments UC3843DTR is a current mode PWM controller designed for off-line and DC-to-DC converters. It operates up to 500kHz and supports multiple topologies.
Mfr Part #:

UC3843DTR

Available from 2 distributors
Mfr Name: Texas Instruments
Texas Instruments
The Texas Instruments UC3843DTR is a current mode PWM controller designed for off-line and DC-to-DC converters. It operates up to 500kHz and supports multiple topologies.
✓ Total Stock: 482,000 pcs
$ Price Range: $0.31

UC3843DTR Available from 2 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Romaks Technologies ✓
Non-Authorised Inventory information
452,000 pcs
On Request
452000 pcs On Request 1 On Request On Request On Request On Request On Request
Components Technology Group, Inc. ✓
Non-Authorised Inventory information
30,000 pcs
On Request
30000 pcs On Request 1 On Request On Request On Request On Request On Request
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

UC3843DTR Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Clock Sync
Control Features
Duty Cycle (Max)
Frequency
Function
Mounting Type
Number of Outputs
Operating Temperature
Output Configuration
Output Phases
Output Type
Supplier Device Package
Supplier Package
Synchronous Rectifier
Topology
Voltage
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UC3843DTR Description

Short technical summary and product information.

The UC3843DTR from Texas Instruments is a single-ended, current mode PWM controller optimized for off-line and DC-to-DC converters. It features an adjustable switching frequency up to 500kHz and a maximum duty cycle of 97%. This controller supports various topologies including Boost, Buck, Buck-Boost, Flyback, and Forward configurations.

 

Key features include low start-up current (<1mA), automatic feedforward compensation, pulse-by-pulse current limiting, and undervoltage lockout with hysteresis. The UC3843DTR is housed in a 14-SOIC package and is designed for surface mount applications. Its operating temperature range is 0°C to 70°C.

 

This device is suitable for applications requiring efficient power conversion, such as AC/DC switching regulators and DC/DC power modules. The integrated error amplifier and high-current totem-pole output simplify design and enhance load-response characteristics.

UC3843DTR Quick Information

Product Type: DC DC Switching Controller
Series: UC3843
Canonical Name: UC3843DTR Current Mode PWM Controller
Subcategory: Current Mode

UC3843DTR Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

UC3843DTR Estimated Pricing

Qty Low High
1+ $0.31 $0.31

Estimated market price range - modelled values for guidance only, not live distributor offers.

UC3843DTR Features

  • Current mode PWM controller
  • Up to 500kHz operating frequency
  • Supports multiple power topologies
  • Surface mount 14-SOIC package
  • Wide operating voltage range

UC3843DTR Applications

  • Used in DC DC boost converter designs.
  • Ideal for buck converter power supplies.
  • Suitable for flyback converter applications.
  • Used in forward converter topologies.
  • Applicable in buck-boost converter circuits.

UC3843DTR FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating voltage range of the UC3843DTR?

The UC3843DTR operates from 12V to 28V.

What is the maximum switching frequency of the UC3843DTR?

The maximum switching frequency is 500kHz.

What is the maximum duty cycle of the UC3843DTR?

The maximum duty cycle is 97%.

What package is the UC3843DTR available in?

The UC3843DTR is available in a 14-SOIC surface-mount package.

What is the operating temperature range of the UC3843DTR?

The operating temperature range is 0°C to 70°C.

What topologies does the UC3843DTR support?

The UC3843DTR supports boost, buck, buck-boost, flyback, and forward topologies.

Does the UC3843DTR support synchronous rectification?

No, the UC3843DTR does not support synchronous rectification.

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