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UCC3581N The Unitrode UCC3581N is a voltage mode PWM controller designed for low power isolated DC-DC converters. It offers features like low operating current and programmable duty cycle.
Mfr Part #:

UCC3581N

Available from 2 distributors
Mfr Name: Unitrode
Unitrode
The Unitrode UCC3581N is a voltage mode PWM controller designed for low power isolated DC-DC converters. It offers features like low operating current and programmable duty cycle.
✓ Total Stock: 4,537 pcs
$ Price Range: $0.78

UCC3581N Available from 2 distributors

✓ 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
4,512 pcs
On Request
4512 pcs On Request 1 On Request On Request On Request On Request On Request
Partservice ✓
Non-Authorised Inventory information
25 pcs
On Request
25 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.

UCC3581N 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 Current
Synchronous Rectifier
Topology
Voltage
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UCC3581N Description

Short technical summary and product information.

The UCC3581N from Unitrode is a micropower voltage mode pulse width modulator designed for controlling low power isolated DC-DC converters, such as those used in Subscriber Line Power for ISDN I.430 applications. Primarily utilized in single switch forward and flyback converters, this BiCMOS controller boasts low startup and operating currents, drawing only 85µA at startup and 300µA during operation.

 

Key features include a programmable minimum duty cycle with cycle skipping for light load efficiency, a programmable maximum duty cycle, and an output current capability of 1A peak source and sink. It supports external oscillator synchronization and offers programmable soft start. The device operates with a supply voltage range of 6.8V to 15V and can handle frequencies up to 100kHz.

 

The UCC3581N is available in a 14-pin PDIP package and is suitable for surface mount applications. Its operating temperature range is 0°C to 70°C (TA). The controller integrates functions to maximize light load efficiency, including a linear preregulator for initial power and cycle skipping to reduce switching losses at lower loads.

UCC3581N Quick Information

Product Type: Voltage Mode PWM Controller
Canonical Name: UCC3581N Voltage Mode PWM Controller
Subcategory: DC DC Switching Controllers

UCC3581N Compliance

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

UCC3581N Estimated Pricing

Qty Low High
1+ $0.78 $0.78

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

UCC3581N Features

  • Low 85µA startup current.
  • Low 300µA operating current.
  • Programmable minimum duty cycle.
  • Programmable maximum duty cycle.
  • 1A peak output current.

UCC3581N Applications

  • Controls low power isolated DC-DC converters.
  • Used in Subscriber Line Power applications.
  • Suitable for forward and flyback converters.
  • Maximizes light load efficiency.

UCC3581N FAQs

6 frequently asked questions generated from this part’s specifications.
What is the operating temperature range of the UCC3581N?

The UCC3581N operates from 0°C to 70°C (TA).

What is the supply voltage range for the UCC3581N?

The supply voltage range is 6.8V to 15V.

What package is the UCC3581N available in?

The UCC3581N is available in a 14-DIP (0.300", 7.62mm) package, also known as 14-PDIP.

What is the maximum switching frequency of the UCC3581N?

The maximum switching frequency is up to 100kHz.

What is the maximum duty cycle of the UCC3581N?

The maximum duty cycle is 84%.

What topologies does the UCC3581N support?

The UCC3581N supports buck, boost, flyback, and forward converter topologies.

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