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UCC3809DTR-1 The Texas Instruments UCC3809DTR-1 is an economy primary side controller for off-line and isolated DC-to-DC power supplies. It operates at up to 1MHz with a 70% maximum duty cycle.
Mfr Part #:

UCC3809DTR-1

Available from 1 distributors
Mfr Name: Texas Instruments
Texas Instruments
The Texas Instruments UCC3809DTR-1 is an economy primary side controller for off-line and isolated DC-to-DC power supplies. It operates at up to 1MHz with a 70% maximum duty cycle.
✓ Total Stock: 2,500 pcs
$ Price Range: $1.30

UCC3809DTR-1 Available from 1 distributor

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Smaxon Electronics ✓
Non-Authorised Inventory information
2,500 pcs
On Request
2500 pcs On Request 1 On Request On Request 21+ 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.

UCC3809DTR-1 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Control Features
Duty Cycle
Frequency
Internal Switch(s)
Lead Spacing
Lead Style
Mounting Type
Operating Temperature
Output Isolation
Supplier Device Package
Supplier Package
Tape & Reel
Topology
Voltage
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UCC3809DTR-1 Description

Short technical summary and product information.

The UCC3809DTR-1 from Texas Instruments is an economy primary side controller designed for off-line and isolated DC-to-DC fixed frequency current mode switching power supplies. It integrates essential control and drive circuitry, minimizing external component count. Key features include user-programmable soft start, a maximum duty cycle of 70%, and an accessible 5V reference. The device operates at frequencies up to 1MHz and supports a wide input voltage range of 8V to 19V.

 

This controller is suitable for various topologies including Boost, Buck, Flyback, and Forward configurations, offering isolated output. It features undervoltage lockout (UVLO) with a 10V turn-on threshold and 8V turn-off threshold for the UCCx809-1 variant. The output stage is designed to sink or source peak current, making it ideal for driving N-Channel MOSFETs.

 

The UCC3809DTR-1 is housed in an 8-SOIC package, measuring 0.154 inches (3.90mm) in width, and is designed for surface mount applications. Its operating temperature range is -55°C to 150°C (TJ). The low startup current of less than 100µA contributes to its economy and low-power characteristics.

UCC3809DTR-1 Quick Information

Product Type: AC/DC Switching Regulator
Series: UCC3809
Canonical Name: UCC3809-1 Economy Primary Side Controller
Subcategory: Offline Switch

UCC3809DTR-1 Compliance

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

UCC3809DTR-1 Estimated Pricing

Qty Low High
1+ $1.30 $1.30

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

UCC3809DTR-1 Features

  • Economy primary side controller for power supplies.
  • User programmable soft start and duty cycle.
  • Operates up to 1MHz frequency.
  • 8V to 19V supply voltage range.
  • 8-SOIC surface mount package.

UCC3809DTR-1 Applications

  • Ideal for off-line power supplies.
  • Suitable for isolated DC-to-DC converters.
  • Supports Boost, Buck, and Flyback topologies.
  • Used in low power switching applications.

UCC3809DTR-1 FAQs

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

8V to 19V.

What is the package type?

8-SOIC (0.154", 3.90mm Width) surface mount.

What is the operating temperature range?

-55°C to 150°C (junction).

What is the switching frequency?

1MHz.

What topologies does the UCC3809DTR-1 support?

Boost, buck, flyback, and forward.

Is the output isolated?

Yes, it is isolated.

Does it have soft start?

Yes, it includes soft start.

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