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UCC2809D-1 The Texas Instruments UCC2809D-1 is an economy primary side controller for offline and isolated DC-to-DC power supplies. It operates up to 1MHz and features user-programmable soft start.
Mfr Part #:

UCC2809D-1

Available from 2 distributors
Mfr Name: Texas Instruments
Texas Instruments
The Texas Instruments UCC2809D-1 is an economy primary side controller for offline and isolated DC-to-DC power supplies. It operates up to 1MHz and features user-programmable soft start.
✓ Total Stock: 483 pcs
$ Price Range: $1.87

UCC2809D-1 Available from 2 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Smaxon Electronics ✓
Non-Authorised Inventory information
403 pcs
On Request
403 pcs On Request 1 On Request On Request 09+ On Request On Request
Braun Electronic Components ✓
Non-Authorised Inventory information
80 pcs
On Request
80 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.

UCC2809D-1 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Control Features
Duty Cycle
Frequency
Internal Switch(s)
Mounting Type
Operating Temperature
Output Isolation
Supplier Device Package
Supplier Package
Supply Voltage
Topology
Voltage
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UCC2809D-1 Description

Short technical summary and product information.

The UCC2809D-1 from Texas Instruments is an integrated circuit designed for economy low-power switching power supplies. It contains essential control and drive circuitry for off-line and isolated DC-to-DC applications, minimizing external component count.

 

Key features include a user-programmable maximum duty cycle of 70% and operation up to 1MHz. The device incorporates undervoltage lockout (UVLO) with a typical start threshold of 10V and 1.65V hysteresis, ensuring reliable startup. It also provides an accessible 5V reference voltage.

 

This controller utilizes current mode control and offers features like soft start for controlled power-up sequences. The output stage is designed to sink or source peak current, suitable for driving N-channel MOSFETs. The UCC2809D-1 is housed in an 8-pin SOIC package, making it suitable for applications where board space is a consideration.

 

It is designed for topologies such as Boost, Flyback, and Forward, offering isolated output capabilities. The operating voltage range is from 8V to 19V, with an operating temperature range of -55°C to 150°C.

UCC2809D-1 Quick Information

Product Type: AC/DC Converter, Offline Switch
Series: UCC2809
Canonical Name: UCC2809D-1 Economy Primary Side Controller
Subcategory: Economy Primary Side Controller

UCC2809D-1 Compliance

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

UCC2809D-1 Estimated Pricing

Qty Low High
1+ $1.87 $1.87

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

UCC2809D-1 Features

  • User-programmable soft start and duty cycle.
  • Operates at frequencies up to 1MHz.
  • Integrated 5V reference voltage.
  • Undervoltage lockout with hysteresis.
  • 0.4A source/0.8A sink FET driver.

UCC2809D-1 Applications

  • Suitable for offline power supplies.
  • Ideal for isolated DC-to-DC converters.
  • Supports Boost, Flyback, and Forward topologies.
  • Designed for economy low-power applications.

UCC2809D-1 FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating voltage range for the UCC2809D-1?

The operating voltage range is 8V to 19V.

What is the operating temperature range for the UCC2809D-1?

The operating temperature range is -55°C to 150°C.

What package type is the UCC2809D-1 available in?

The UCC2809D-1 is available in an 8-SOIC package.

What is the maximum duty cycle for the UCC2809D-1?

The maximum duty cycle is 70%.

What control features does the UCC2809D-1 offer?

The UCC2809D-1 offers frequency control and soft start.

What is the startup current for the UCC2809D-1?

The startup current is typically 100µA.

What are the source and sink current capabilities of the FET driver?

The FET driver can source 0.4A and sink 0.8A.

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