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UC3845N The Texas Instruments UC3845N is a current mode PWM controller designed for off-line and DC-to-DC converters. It operates up to 500kHz and is available in an 8-PDIP package.
Mfr Part #:

UC3845N

Available from 2 distributors
Mfr Name: Texas Instruments
Texas Instruments
The Texas Instruments UC3845N is a current mode PWM controller designed for off-line and DC-to-DC converters. It operates up to 500kHz and is available in an 8-PDIP package.
✓ Total Stock: 4,634 pcs
$ Price Range: $0.85

UC3845N Available from 2 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Xingangxin ✓
Non-Authorised Inventory information
3,121 pcs
On Request
3121 pcs On Request 1 On Request On Request On Request On Request On Request
Smaxon Electronics ✓
Non-Authorised Inventory information
1,513 pcs
On Request
1513 pcs On Request 1 On Request On Request 16+13 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.

UC3845N 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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UC3845N Description

Short technical summary and product information.

The UC3845N from Texas Instruments is a high-performance, current-mode Pulse Width Modulation (PWM) controller. It is optimized for off-line and DC-to-DC converter applications, requiring a minimal number of external components.

 

This controller supports a wide operating voltage range of 12V to 28V and can operate at frequencies up to 500kHz. It features a maximum duty cycle of 48% and offers various control features including frequency control. The UC3845N is designed for multiple topologies including Boost, Buck, Buck-Boost, Flyback, and Forward.

 

Packaged in an 8-PDIP with Through Hole mounting, the UC3845N is suitable for applications requiring a robust and efficient power management solution. Its operating temperature range is from 0°C to 70°C.

 

The UC3845N integrates essential circuits such as undervoltage lockout (UVLO) with hysteresis, automatic feedforward compensation, and pulse-by-pulse current limiting. It also includes a high-current totem-pole output stage designed for driving N-channel MOSFETs.

UC3845N Quick Information

Product Type: DC DC Switching Controller
Series: UCx84x
Canonical Name: UC3845N Current Mode PWM Controller
Subcategory: DC DC Switching Controllers

UC3845N Compliance

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

UC3845N Estimated Pricing

Qty Low High
1+ $0.85 $0.85

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

UC3845N Features

  • Current mode PWM controller for converters.
  • Operates at frequencies up to 500kHz.
  • Supports multiple power topologies.
  • Wide 12V to 28V operating voltage.
  • Through Hole mounted 8-PDIP package.

UC3845N Applications

  • Ideal for off-line converters.
  • Suitable for DC-to-DC applications.
  • Used in Boost converter designs.
  • Applicable for Buck converter circuits.
  • Supports Flyback topology designs.

UC3845N FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating voltage range of the UC3845N?

The UC3845N operates from 12V to 28V.

What topologies does the UC3845N support?

The UC3845N supports Boost, Buck, Buck-Boost, Flyback, and Forward topologies.

What is the maximum switching frequency of the UC3845N?

The maximum switching frequency is 500kHz.

What is the package type of the UC3845N?

The UC3845N is available in an 8-PDIP (0.300", 7.62mm) through-hole package.

What is the operating temperature range of the UC3845N?

The operating temperature range is 0°C to 70°C (TA).

What is the output type of the UC3845N?

The output type is Transistor Driver.

Does the UC3845N have a synchronous rectifier?

No, the UC3845N does not have a synchronous rectifier.

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