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UC2843BD1 The STMicroelectronics UC2843BD1 is a high-performance current mode controller designed for DC-DC converter applications. It operates within a voltage range of 7.6V to 30V and supports frequencies up to 500kHz.
Mfr Part #:

UC2843BD1

Available from 2 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
The STMicroelectronics UC2843BD1 is a high-performance current mode controller designed for DC-DC converter applications. It operates within a voltage range of 7.6V to 30V and supports frequencies up to 500kHz.
✓ Total Stock: 11,589 pcs
$ Price Range: $0.78

UC2843BD1 Available from 2 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Fe Components ✓
Non-Authorised Inventory information
7,589 pcs
On Request
7589 pcs On Request 1 On Request On Request On Request On Request On Request
Risen Electronics ✓
Non-Authorised Inventory information
4,000 pcs
On Request
4000 pcs On Request 1 On Request On Request On Request On Request 2026-02-16 21:33:16
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.

UC2843BD1 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
SVHC Present
Supplier Device Package
Synchronous Rectifier
Topology
Voltage
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UC2843BD1 Description

Short technical summary and product information.

The UC2843BD1 from STMicroelectronics is a fixed-frequency current mode controller suitable for off-line and DC-DC converter applications. It offers a cost-effective solution with minimal external components. Key features include a trimmed oscillator for precise frequency control, a temperature-compensated reference, a high-gain error amplifier, and a current sensing comparator.

 

This controller operates with a voltage input range of 7.6V to 30V and supports frequencies up to 500kHz, with a maximum duty cycle of 96%. It is designed for boost and flyback topologies and provides a transistor driver output. The device is available in an 8-SOIC package and is surface-mounted.

 

Protective features include input and reference undervoltage lockouts with hysteresis, cycle-by-cycle current limiting, and programmable output deadtime. The UC2843BD1 is designed for applications requiring efficient power conversion and precise control.

UC2843BD1 Quick Information

Product Type: DC DC Switching Controller
Canonical Name: UC2843BD1 Current Mode Controller
Subcategory: Current Mode Controller

UC2843BD1 Compliance

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

UC2843BD1 Estimated Pricing

Qty Low High
1+ $0.78 $0.78

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

UC2843BD1 Features

  • High performance current mode controller.
  • Operates from 7.6V to 30V.
  • Frequency up to 500kHz.
  • 96% maximum duty cycle.
  • Surface mount 8-SOIC package.

UC2843BD1 Applications

  • Suitable for DC-DC converters.
  • Designed for boost topology.
  • Designed for flyback topology.
  • Used in off-line applications.

UC2843BD1 FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating voltage range for the UC2843BD1?

The operating voltage range is 7.6 V to 30 V.

What is the maximum operating frequency of the UC2843BD1?

The maximum operating frequency is 500 kHz.

What is the maximum duty cycle for the UC2843BD1?

The maximum duty cycle is 96%.

What package type is the UC2843BD1 available in?

The UC2843BD1 is available in an 8-SOIC package.

What is the operating temperature range of the UC2843BD1?

The operating temperature range is -25°C to 85°C (TA).

What type of DC-DC converter function does the UC2843BD1 support?

The UC2843BD1 supports Step-Up and Step-Up/Step-Down functions.

What topologies are supported by the UC2843BD1?

The UC2843BD1 supports Boost and Flyback topologies.

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