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UC3843BN The UC3843BN from On Semiconductor 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 #:

UC3843BN

Available from 1 distributors
Mfr Name: On Semiconductor
On Semiconductor
The UC3843BN from On Semiconductor 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: 193 pcs
$ Price Range: $0.78

UC3843BN Available from 1 distributor

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Smaxon Electronics ✓
Non-Authorised Inventory information
193 pcs
On Request
193 pcs On Request 1 On Request On Request 10+ 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.

UC3843BN 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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UC3843BN Description

Short technical summary and product information.

The UC3843BN is a fixed-frequency current mode controller from On Semiconductor, 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 high-current totem pole output. Protective features include undervoltage lockouts with hysteresis, cycle-by-cycle current limiting, and programmable output deadtime.

 

This controller operates with a voltage range of 7.6V to 30V and supports frequencies up to 500kHz, with a maximum duty cycle of 96%. It is available in an 8-pin PDIP package suitable for through-hole mounting.

 

The UC3843BN is designed for applications requiring efficient power conversion, such as step-up and step-down converters. Its current mode operation and integrated features simplify design and reduce component count.

UC3843BN Quick Information

Product Type: DC DC Switching Controller
Canonical Name: UC3843BN Current Mode Controller

UC3843BN Compliance

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

UC3843BN Estimated Pricing

Qty Low High
1+ $0.78 $0.78

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

UC3843BN Features

  • High performance current mode controller.
  • Wide operating voltage from 7.6V to 30V.
  • Frequency control up to 500kHz.
  • 8-PDIP package for through-hole mounting.
  • Integrated protective features included.

UC3843BN Applications

  • Suitable for DC-DC converters.
  • Ideal for boost and flyback topologies.
  • Designed for off-line applications.
  • Cost-effective power solutions.

UC3843BN FAQs

6 frequently asked questions generated from this part’s specifications.
What is the operating voltage range of the UC3843BN?

The UC3843BN operates from 7.6V to 30V.

What is the maximum switching frequency of the UC3843BN?

The maximum switching frequency is 500kHz.

What is the maximum duty cycle of the UC3843BN?

The maximum duty cycle is 96%.

What is the operating temperature range of the UC3843BN?

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

What package is the UC3843BN available in?

The UC3843BN is available in an 8-DIP (0.300", 7.62mm) through-hole package.

What topologies does the UC3843BN support?

The UC3843BN supports boost and flyback topologies.

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