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UC3845BDG The On Semiconductor UC3845BDG is a high-performance fixed-frequency current mode controller designed for off-line and DC-DC converter applications. It features a voltage range of 7.6V to 30V and operates at frequencies up to 500kHz.
Mfr Part #:

UC3845BDG

Available from 1 distributors
Mfr Name: On Semiconductor
On Semiconductor
The On Semiconductor UC3845BDG is a high-performance fixed-frequency current mode controller designed for off-line and DC-DC converter applications. It features a voltage range of 7.6V to 30V and operates at frequencies up to 500kHz.
✓ Total Stock: 2,500 pcs
$ Price Range: $0.78

UC3845BDG Available from 1 distributor

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Components Technology Group, Inc. ✓
Non-Authorised Inventory information
2,500 pcs
On Request
2500 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.

UC3845BDG 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
Supplier Device Package
Synchronous Rectifier
Topology
Voltage
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UC3845BDG Description

Short technical summary and product information.

The UC3845BDG from On Semiconductor is a versatile current mode controller suitable for off-line and DC-DC converter applications. It offers a wide operating voltage range from 7.6V to 30V and supports switching frequencies up to 500kHz. The device integrates key components including an oscillator, a temperature-compensated reference, a high-gain error amplifier, and a high-current totem pole output, minimizing external component requirements.

 

Key features include latching PWM for cycle-by-cycle current limiting, adjustable output deadtime from 50% to 70%, and automatic feed-forward compensation. The UC3845BDG is available in a 14-SOIC package, designed for surface mounting.

 

This controller is well-suited for applications requiring efficient power conversion with minimal external circuitry. Its robust design and integrated protective features make it a cost-effective solution for various power supply designs.

UC3845BDG Quick Information

Product Type: DC DC Switching Controller
Series: UC3845
Canonical Name: UC3845BDG Current Mode Controller
Subcategory: Current Mode Controller

UC3845BDG Compliance

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

UC3845BDG Estimated Pricing

Qty Low High
1+ $0.78 $0.78

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

UC3845BDG Features

  • High performance current mode controller.
  • Operates from 7.6V to 30V supply.
  • Switching frequency up to 500kHz.
  • Adjustable output deadtime.
  • Surface mount 14-SOIC package.

UC3845BDG Applications

  • Suitable for off-line converters.
  • Used in DC-DC converter designs.
  • Ideal for boost applications.
  • Flyback converter designs.

UC3845BDG FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating voltage range of UC3845BDG?

The operating voltage range is 7.6V to 30V.

What package does the UC3845BDG come in?

The UC3845BDG is available in a 14-SOIC surface mount package with 0.154" width.

What is the operating temperature range of UC3845BDG?

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

What is the switching frequency of UC3845BDG?

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

What topologies does the UC3845BDG support?

It supports boost and flyback topologies.

What is the maximum duty cycle of UC3845BDG?

The maximum duty cycle is 48%.

Does the UC3845BDG have undervoltage lockout?

Yes, UVLO thresholds are 8.5V on and 7.6V off.

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