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UC3843D8TR The Unitrode UC3843D8TR is a single-ended, current-mode PWM controller operating up to 500kHz. It features a 100% duty cycle and an undervoltage lockout with 8.4V/7.6V hysteresis.
Mfr Part #:

UC3843D8TR

Available from 1 distributors
Mfr Name: Unitrode
Unitrode
The Unitrode UC3843D8TR is a single-ended, current-mode PWM controller operating up to 500kHz. It features a 100% duty cycle and an undervoltage lockout with 8.4V/7.6V hysteresis.
✓ Total Stock: 345 pcs
$ Price Range: $0.27

UC3843D8TR Available from 1 distributor

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Bristol Electronics ✓
Non-Authorised Inventory information
345 pcs
On Request
345 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
Duty Cycle
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Tape & Reel
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UC3843D8TR Description

Short technical summary and product information.

The UC3843D8TR from Unitrode is a current-mode Pulse Width Modulation (PWM) controller designed for off-line and DC-to-DC converters. This integrated circuit operates at frequencies up to 500kHz with a 100% duty cycle capability.

 

Key electrical features include a low start-up current of less than 1mA and an undervoltage lockout (UVLO) with hysteresis set at 8.4V and 7.6V. The device is optimized for high-performance power supply designs, offering features such as pulse-by-pulse current limiting and enhanced load-response characteristics.

 

Packaged in an 8-pin SOIC (D) surface-mount package, the UC3843D8TR operates within a temperature range of 0°C to 70°C. It is suitable for applications requiring efficient power conversion and precise control.

 

Note: This part is not recommended for new designs.

UC3843D8TR Quick Information

Product Type: DC DC Switching Controller
Series: UC384x
Canonical Name: UC3843D8TR Current Mode PWM Controller
Subcategory: Power Management IC

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

  • Operates up to 500kHz frequency.
  • Features 100% duty cycle capability.
  • Undervoltage lockout with 8.4V/7.6V.
  • Low start-up current less than 1mA.
  • Surface mount 8-pin SOIC package.

UC3843D8TR Applications

  • Optimized for off-line converters.
  • Suitable for DC-to-DC converters.
  • Used in power supply designs.
  • Enables fixed-frequency control schemes.

UC3843D8TR FAQs

6 frequently asked questions generated from this part’s specifications.
What is the operating frequency of the UC3843D8TR?

The UC3843D8TR operates up to 500kHz.

What is the duty cycle of the UC3843D8TR?

The UC3843D8TR has a 100% duty cycle.

What are the undervoltage lockout (UVLO) levels for the UC3843D8TR?

The UVLO levels are 8.4V and 7.6V.

What is the start-up current for the UC3843D8TR?

The start-up current is less than 1mA.

What is the operating temperature range of the UC3843D8TR?

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

What package type is the UC3843D8TR supplied in?

The UC3843D8TR is supplied in an 8-pin SOIC (D) package.

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