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UC3843BVDG The ON Semiconductor UC3843BVDG is a high-performance current mode controller designed for DC-DC converter applications. It operates with a supply voltage range of 7.6V to 30V and features a maximum frequency of 500kHz.
Mfr Part #:

UC3843BVDG

Available from 1 distributors
Mfr Name: On Semiconductor
On Semiconductor
The ON Semiconductor UC3843BVDG is a high-performance current mode controller designed for DC-DC converter applications. It operates with a supply voltage range of 7.6V to 30V and features a maximum frequency of 500kHz.
✓ Total Stock: 2,825 pcs
$ Price Range: $0.78

UC3843BVDG Available from 1 distributor

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Flip Electronics ✓
Non-Authorised Inventory information
2,825 pcs
On Request
2825 pcs On Request 1 On Request On Request On Request On Request On Request
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UC3843BVDG 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 Current
Output Phases
Output Type
Output Voltage
Supplier Device Package
Supplier Package
Synchronous Rectifier
Tape & Reel
Topology
Voltage
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UC3843BVDG Description

Short technical summary and product information.

The UC3843BVDG 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 frequency control and a temperature-compensated reference.

 

Key electrical specifications include a wide operating voltage range of 7.6V to 30V, a maximum duty cycle of 96%, and a maximum operating frequency of up to 500kHz. The device also includes features such as undervoltage lockout with hysteresis, cycle-by-cycle current limiting, and a high-current totem pole output. The UC3843BVDG is suitable for boost, flyback, step-up, and step-up/step-down topologies.

 

This controller is available in a 14-SOIC surface mount package. It operates within a temperature range of -40°C to 105°C. The device is RoHS compliant and Halogen Free, making it suitable for various modern electronic designs requiring reliable power management solutions.

UC3843BVDG Quick Information

Product Type: DC DC Switching Controller
Series: UC3842B/UC3843B
Canonical Name: UC3843BVDG Current Mode Controller
Subcategory: PWM Controller

UC3843BVDG Compliance

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

UC3843BVDG Estimated Pricing

Qty Low High
1+ $0.78 $0.78

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

UC3843BVDG Features

  • High performance current mode controller.
  • Wide 7.6V to 30V operating voltage.
  • Up to 500kHz operating frequency.
  • 96% maximum duty cycle.
  • Surface mount 14-SOIC package.

UC3843BVDG Applications

  • Ideal for DC-DC converters.
  • Suitable for boost topologies.
  • Used in flyback converters.
  • Supports step-up applications.
  • Designed for off-line power supplies.

UC3843BVDG FAQs

7 frequently asked questions generated from this part’s specifications.
What is the supply voltage range of the UC3843BVDG?

The supply voltage range is 7.6V to 30V.

What package does the UC3843BVDG come in?

It is available in a 14-SOIC surface-mount package (0.154", 3.90mm width).

What is the operating temperature range?

-40°C to 105°C.

What is the oscillator frequency of the UC3843BVDG?

The oscillator frequency is guaranteed at 250kHz and can operate up to 500kHz.

What is the output current capability?

The output stage can deliver up to 1A.

What is the maximum duty cycle?

The maximum duty cycle is 96%.

What are the undervoltage lockout thresholds?

The UVLO turn-on threshold is 8.5V and turn-off is 7.6V.

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