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UC3845D The Texas Instruments UC3845D is a fixed frequency, current mode PWM controller designed for Off-Line and DC to DC converter applications. It offers precise duty cycle control and operates at frequencies up to 500kHz.
Mfr Part #:

UC3845D

Available from 1 distributors
Mfr Name: Texas Instruments
Texas Instruments
The Texas Instruments UC3845D is a fixed frequency, current mode PWM controller designed for Off-Line and DC to DC converter applications. It offers precise duty cycle control and operates at frequencies up to 500kHz.
✓ Total Stock: 2,000 pcs
$ Price Range: $0.78

UC3845D 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
2,000 pcs
On Request
2000 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.

UC3845D 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 Current
Output Phases
Output Type
Supplier Device Package
Supplier Package
Supply Voltage
Synchronous Rectifier
Topology
Voltage
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UC3845D Description

Short technical summary and product information.

The UC3845D from Texas Instruments is a high-performance, fixed-frequency current mode PWM controller. It is engineered for efficiency in Off-Line and DC to DC converter applications, requiring minimal external components. This controller features a trimmed oscillator for accurate duty cycle control and a temperature-compensated reference.

 

Key electrical specifications include a supply voltage range of 12V to 28V and an operating frequency of up to 500kHz. The maximum duty cycle is rated at 48%. The device supports various topologies such as Boost, Buck, Buck-Boost, Flyback, and Forward, with a single positive, isolation-capable output.

 

Packaged in a 14-SOIC surface mount configuration, the UC3845D operates within an ambient temperature range of 0°C to 70°C. Its thermal characteristics include a junction-to-ambient thermal resistance of 180°C/W for the 14-SOP package. The controller is designed for applications requiring precise power management and control.

UC3845D Quick Information

Product Type: DC DC Switching Controller
Canonical Name: UC3845D Current Mode PWM Controller
Subcategory: SMPS Controller

UC3845D Compliance

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

UC3845D Estimated Pricing

Qty Low High
1+ $0.78 $0.78

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

UC3845D Features

  • Fixed frequency current mode PWM controller.
  • Operates up to 500kHz frequency.
  • Supports multiple converter topologies.
  • 12V to 28V supply voltage range.
  • Surface mount 14-SOIC package.

UC3845D Applications

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

UC3845D FAQs

6 frequently asked questions generated from this part’s specifications.
What is the operating temperature range of the UC3845D?

The UC3845D has an operating temperature range of 0°C to 70°C.

What package is the UC3845D available in?

The UC3845D is available in a 14-SOIC surface mount package.

What is the supply voltage range for the UC3845D?

The UC3845D operates from a supply voltage of 12V to 28V.

What topologies does the UC3845D support?

The UC3845D supports boost, buck, buck-boost, flyback, and forward topologies.

What is the maximum switching frequency of the UC3845D?

The maximum switching frequency of the UC3845D is 500kHz.

What is the maximum duty cycle of the UC3845D?

The maximum duty cycle of the UC3845D is 48%.

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