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UC3843D8TR The Texas Instruments UC3843D8TR is a current mode PWM controller designed for DC-to-DC converters. It operates up to 500kHz and features a 97% maximum duty cycle.
Mfr Part #:

UC3843D8TR

Available from 2 distributors
Mfr Name: Texas Instruments
Texas Instruments
The Texas Instruments UC3843D8TR is a current mode PWM controller designed for DC-to-DC converters. It operates up to 500kHz and features a 97% maximum duty cycle.
✓ Total Stock: 9,474 pcs
$ Price Range: $0.27

UC3843D8TR Available from 2 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Xingangxin ✓
Non-Authorised Inventory information
9,388 pcs
On Request
9388 pcs On Request 1 On Request On Request On Request On Request On Request
Bristol Electronics ✓
Non-Authorised Inventory information
86 pcs
On Request
86 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.

UC3843D8TR Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Clock Sync
Control Features
Duty Cycle (Max)
Frequency
Function
Lead Style
Mounting Type
Number of Outputs
Operating Temperature
Output Configuration
Output Phases
Output Type
Supplier Device Package
Synchronous Rectifier
Topology
Voltage
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UC3843D8TR Description

Short technical summary and product information.

The UC3843D8TR from Texas Instruments is a single-ended, current-mode PWM controller suitable for offline and DC-to-DC power supply applications. It operates at frequencies up to 500kHz and supports a wide input voltage range of 12V to 28V, with a maximum duty cycle of 97%.

 

This controller integrates essential features for efficient power conversion, including automatic feedforward compensation, pulse-by-pulse current limiting, and enhanced load-response characteristics. It also includes an undervoltage lockout with hysteresis and double-pulse suppression.

 

The UC3843D8TR is housed in an 8-SOIC package and is designed for surface mount applications. It is optimized for various topologies including Boost, Buck, Buck-Boost, Flyback, and Forward converters. Note that this part is not recommended for new designs.

 

Key electrical characteristics include a 12V to 28V operating voltage range and a frequency of up to 500kHz. The device offers a transistor driver output and supports positive, isolation-capable configurations.

UC3843D8TR Quick Information

Product Type: DC DC Switching Controller
Series: UC3843
Canonical Name: UC3843D8TR Current Mode PWM Controller
Subcategory: Power Management ICs

UC3843D8TR Compliance

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

UC3843D8TR Estimated Pricing

Qty Low High
1+ $0.27 $0.27

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

UC3843D8TR Features

  • Current mode PWM controller for DC-to-DC converters.
  • Operates at frequencies up to 500kHz.
  • Supports 12V to 28V input voltage range.
  • Features 97% maximum duty cycle.
  • Housed in an 8-SOIC package for surface mounting.

UC3843D8TR Applications

  • Optimized for off-line converters.
  • Suitable for DC-to-DC power supplies.
  • Supports Boost and Buck topologies.
  • Used in Flyback and Forward converters.
  • Designed for current-mode control schemes.

UC3843D8TR FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating voltage range for the UC3843D8TR?

The operating voltage range is 12V to 28V.

What is the maximum operating frequency of the UC3843D8TR?

The maximum operating frequency is 500kHz.

What is the maximum duty cycle for the UC3843D8TR?

The maximum duty cycle is 97%.

What package type is the UC3843D8TR available in?

The UC3843D8TR is available in an 8-SOIC package.

What is the operating temperature range for the UC3843D8TR?

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

Is the UC3843D8TR RoHS compliant?

Yes, the UC3843D8TR is RoHS3 Compliant.

What is the Moisture Sensitivity Level (MSL) for the UC3843D8TR?

The MSL is Level 1.

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