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UC3843BNG The ON Semiconductor UC3843BNG is a high-performance current mode PWM controller designed for DC-DC converter applications. It offers precise frequency control and a high current totem pole output.
Mfr Part #:

UC3843BNG

Available from 6 distributors
Mfr Name: On Semiconductor
On Semiconductor
The ON Semiconductor UC3843BNG is a high-performance current mode PWM controller designed for DC-DC converter applications. It offers precise frequency control and a high current totem pole output.
✓ Total Stock: 7,621 pcs
$ Price Range: $0.78

UC3843BNG Available from 6 distributors

✓ Authorised
✓ Non-Authorised
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.

UC3843BNG 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
Operating Voltage
Output Configuration
Output Phases
Output Type
SVHC Present
Supplier Device Package
Synchronous Rectifier
Topology
Voltage
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UC3843BNG Description

Short technical summary and product information.

The ON Semiconductor UC3843BNG is a fixed-frequency, current-mode controller designed for off-line and DC-DC converter applications. It provides 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. The device supports current mode operation up to 500 kHz and has a maximum duty cycle of 96%. It is suitable for Boost, Flyback, and Forward topologies.

 

Protective features include undervoltage lockouts with hysteresis, cycle-by-cycle current limiting, and programmable output deadtime. The UC3843BNG is available in an 8-pin PDIP package and operates over a temperature range of 0°C to 70°C.

 

This controller is ideal for designers seeking a robust and efficient solution for power management in various electronic systems.

UC3843BNG Quick Information

Product Type: Switching Controller
Series: UC3843B
Canonical Name: UC3843BNG Current Mode PWM Controller
Subcategory: Current Mode PWM Controllers

UC3843BNG Compliance

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

UC3843BNG Estimated Pricing

Qty Low High
1+ $0.78 $0.78

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

UC3843BNG Features

  • High performance current mode controller.
  • Fixed frequency operation up to 500kHz.
  • Maximum duty cycle of 96%.
  • Suitable for Boost, Flyback, and Forward topologies.
  • Available in 8-PDIP package.

UC3843BNG Applications

  • Used in boost converter power supply designs.
  • Ideal for flyback converter topologies.
  • Suitable for forward converter applications.
  • Applied in power management for industrial systems.

UC3843BNG FAQs

6 frequently asked questions generated from this part’s specifications.
What is the operating voltage range of the UC3843BNG?

The UC3843BNG operates from 7.6V to 30V.

What is the operating temperature range of the UC3843BNG?

The UC3843BNG operates from 0°C to 70°C.

What package is the UC3843BNG available in?

The UC3843BNG is available in an 8-PDIP (0.300", 7.62mm) through-hole package.

What is the maximum duty cycle of the UC3843BNG?

The maximum duty cycle of the UC3843BNG is 96%.

What topologies does the UC3843BNG support?

The UC3843BNG supports boost, flyback, and forward topologies.

What is the oscillator frequency of the UC3843BNG?

The oscillator frequency is guaranteed at 250 kHz, with operation possible up to 500 kHz.

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