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UC1843J The Texas Instruments UC1843J is a Current Mode PWM Controller designed for off-line and DC-to-DC converters. It operates at fixed frequencies up to 500kHz.
Mfr Part #:

UC1843J

Available from 2 distributors
Mfr Name: Texas Instruments
Texas Instruments
The Texas Instruments UC1843J is a Current Mode PWM Controller designed for off-line and DC-to-DC converters. It operates at fixed frequencies up to 500kHz.
✓ Total Stock: 5,438 pcs
$ Price Range: $8.76

UC1843J Available from 2 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Optech Co.,Limited ✓
Non-Authorised Inventory information
5,400 pcs
On Request
5400 pcs On Request 1 On Request On Request 18+ On Request On Request
Fe Components ✓
Non-Authorised Inventory information
38 pcs
On Request
38 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.

UC1843J Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
AEC Qualified
Automotive Grade
Duty Cycle (Max)
Features
Industrial Grade
Lead Spacing
Medical Grade
Military Grade
Mounting Type
Storage Temperature
Tape & Reel
Topology
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UC1843J Description

Short technical summary and product information.

The UC1843J from Texas Instruments is a current-mode Pulse Width Modulation (PWM) controller designed for efficient power management in off-line and DC-to-DC converter applications. This integrated circuit offers features such as an error amplifier, fixed frequency operation, and multi-topology support, enabling robust control schemes with minimal external components.

 

Key electrical characteristics include a maximum duty cycle of 100% and operation up to 500kHz. It also features a low start-up current of less than 1mA, undervoltage lockout with hysteresis, and pulse-by-pulse current limiting for enhanced protection and performance. The high-current totem-pole output is suitable for driving power switches effectively.

 

Available in CDIP (JG) and LCCC (FK) packages, the UC1843J is optimized for applications requiring precise current control and stable operation. Its design considerations include automatic feedforward compensation and enhanced load-response characteristics, making it a versatile choice for power supply designs. Note that this part is not recommended for new designs.

UC1843J Quick Information

Product Type: Current Mode PWM Controller
Series: UC1843
Canonical Name: UC1843J Current Mode PWM Controller
Subcategory: Logic

UC1843J Compliance

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

UC1843J Estimated Pricing

Qty Low High
1+ $8.76 $8.76

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

UC1843J Features

  • Current mode PWM controller
  • Fixed frequency operation
  • Up to 500kHz operation
  • Low start-up current (< 1mA)
  • Available in CDIP and LCCC packages

UC1843J Applications

  • Optimized for off-line converters
  • Suitable for DC-to-DC converters
  • Enables current-mode control schemes
  • Provides precise current limiting

UC1843J FAQs

5 frequently asked questions generated from this part’s specifications.
What is the control mode of the UC1843J?

The UC1843J operates in current mode.

What is the maximum operating frequency of the UC1843J?

The UC1843J can operate up to 500kHz.

What is the start-up current for the UC1843J?

The start-up current is less than 1mA.

What package types are available for the UC1843J?

The UC1843J is available in CDIP (JG) and LCCC (FK) package types.

Is the UC1843J recommended for new designs?

No, the UC1843J is not recommended for new designs. New designs should consider an alternate product.

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