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UC3843BDR2G The On Semiconductor UC3843BDR2G 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 features a frequency control.
Mfr Part #:

UC3843BDR2G

Available from 2 distributors
Mfr Name: On Semiconductor
On Semiconductor
The On Semiconductor UC3843BDR2G 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 features a frequency control.
✓ Total Stock: 11,500 pcs
$ Price Range: $0.78

UC3843BDR2G Available from 2 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Flip Electronics ✓
Non-Authorised Inventory information
7,500 pcs
On Request
7500 pcs On Request 1 On Request On Request On Request On Request On Request
Xingangxin ✓
Non-Authorised Inventory information
4,000 pcs
On Request
4000 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.

UC3843BDR2G Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Clock Sync
Control Features
Duty Cycle (Max)
Frequency
Function
Halogen Free
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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UC3843BDR2G Description

Short technical summary and product information.

The UC3843BDR2G from On Semiconductor is a fixed-frequency, current-mode controller designed for efficient Off-Line and DC-DC converter applications. It offers a cost-effective solution with minimal external components, featuring a trimmed oscillator for precise duty cycle control and a temperature-compensated reference.

 

This controller supports various topologies including Boost and Flyback, operating at frequencies up to 500kHz. It provides essential features like automatic feed-forward compensation and latching PWM for cycle-by-cycle current limiting. The device operates within a voltage range of 7.6V to 30V and is housed in a 14-SOIC package, suitable for surface mounting.

 

Protective features include undervoltage lockouts with hysteresis, ensuring reliable operation. The UC3843B variant is tailored for lower voltage applications with specific UVLO thresholds. Its output is a transistor driver, capable of driving a power MOSFET, and it supports positive output configurations with isolation capability.

UC3843BDR2G Quick Information

Product Type: DC DC Switching Controller
Canonical Name: UC3843BDR2G Current Mode Controller
Subcategory: DC DC Switching Controllers

UC3843BDR2G Compliance

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

UC3843BDR2G Estimated Pricing

Qty Low High
1+ $0.78 $0.78

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

UC3843BDR2G Features

  • High performance current mode controller.
  • Operates at frequencies up to 500kHz.
  • Supports Boost and Flyback topologies.
  • Wide operating voltage range: 7.6V to 30V.
  • Surface mount 14-SOIC package.

UC3843BDR2G Applications

  • Ideal for DC-DC converter designs.
  • Suitable for Off-Line power supplies.
  • Used in flyback converter circuits.
  • Applicable for boost converter circuits.

UC3843BDR2G FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating voltage range for the UC3843BDR2G?

The operating voltage range is 7.6 V to 30 V.

What topologies does the UC3843BDR2G support?

It supports Boost and Flyback topologies.

What is the maximum operating frequency of the UC3843BDR2G?

The operating frequency is up to 500kHz.

What is the package type for the UC3843BDR2G?

The package type is 14-SOIC for surface mounting.

What is the operating temperature range?

The operating temperature range is 0°C to 70°C (TA).

Is the UC3843BDR2G RoHS compliant?

Yes, it is RoHS3 Compliant.

What is the Moisture Sensitivity Level (MSL) for this part?

The Moisture Sensitivity Level is 1 Unlimited.

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