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UCC3809PW-1 The Texas Instruments UCC3809PW-1 is an economy primary side controller for offline and isolated DC-to-DC power supplies. It operates at a 1MHz switching frequency with a 70% maximum duty cycle.
Mfr Part #:

UCC3809PW-1

Available from 1 distributors
Mfr Name: Texas Instruments
Texas Instruments
The Texas Instruments UCC3809PW-1 is an economy primary side controller for offline and isolated DC-to-DC power supplies. It operates at a 1MHz switching frequency with a 70% maximum duty cycle.
✓ Total Stock: 153 pcs
$ Price Range: $0.75

UCC3809PW-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
153 pcs
On Request
153 pcs On Request 1 On Request On Request 10+ 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.

UCC3809PW-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
Topology
Voltage
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UCC3809PW-1 Description

Short technical summary and product information.

The UCC3809PW-1 from Texas Instruments is an integrated circuit designed for economy low-power, fixed-frequency current mode switching power supplies. It requires minimal external components for off-line and isolated DC-to-DC applications.

 

Key features include user-programmable soft start and maximum duty cycle, an accessible 5V reference, and undervoltage lockout. The device operates up to 1MHz and includes a 0.4A source/0.8A sink FET driver. Its supply voltage range is 8V to 19V, with a startup voltage of 15V and a maximum duty cycle of 70%.

 

This IC is housed in an 8-TSSOP package suitable for surface mounting, making it ideal for applications where board space is limited. The UCC3809PW-1 supports Boost, Buck, Flyback, and Forward topologies and provides isolated output.

 

Designed for efficiency, it features low startup current (less than 100µA) and low standby current. The control features include frequency control and soft start, enabling flexible power supply designs.

UCC3809PW-1 Quick Information

Product Type: Power Management IC
Canonical Name: UCC3809PW-1 Economy Primary Side Controller
Subcategory: AC DC Converters, Offline Switches

UCC3809PW-1 Compliance

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

UCC3809PW-1 Estimated Pricing

Qty Low High
1+ $0.75 $0.75

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

UCC3809PW-1 Features

  • Economy primary side controller for power supplies.
  • Supports Boost, Buck, Flyback, and Forward topologies.
  • Operates at 1MHz switching frequency.
  • User-programmable soft start and duty cycle.
  • 8-TSSOP surface-mount package.

UCC3809PW-1 Applications

  • Ideal for offline power supplies.
  • Suitable for isolated DC-to-DC converters.
  • Used in space-constrained designs.
  • Enables flexible power supply configurations.

UCC3809PW-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-TSSOP

What is the operating temperature range?

-55°C to 150°C (junction)

What is the switching frequency?

1MHz

What topologies does the UCC3809PW-1 support?

Boost, buck, flyback, and forward

What is the maximum duty cycle?

70%

Does it have soft start?

Yes

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