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UCC2891PWR The Texas Instruments UCC2891PWR is a PWM controller designed for various active clamp/reset switching power topologies. It operates within an 8.5V to 16V range with a maximum frequency of 250kHz.
Mfr Part #:

UCC2891PWR

Available from 1 distributors
Mfr Name: Texas Instruments
Texas Instruments
The Texas Instruments UCC2891PWR is a PWM controller designed for various active clamp/reset switching power topologies. It operates within an 8.5V to 16V range with a maximum frequency of 250kHz.
✓ Total Stock: 185 pcs
$ Price Range: $1.61

UCC2891PWR 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
185 pcs
On Request
185 pcs On Request 1 On Request On Request 13+08 On Request On Request
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UCC2891PWR 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 Phases
Output Type
Storage Temperature
Supplier Device Package
Supplier Package
Synchronous Rectifier
Tape & Reel
Topology
Voltage
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UCC2891PWR Description

Short technical summary and product information.

The Texas Instruments UCC2891PWR is a peak current-mode, fixed-frequency PWM controller designed to simplify the implementation of active clamp/reset switching power topologies. It is suitable for applications such as active clamp/reset forward, flyback, and forward converters.

 

Key features include a 110-V input startup regulator on specific variants (UCC2891/3), low output jitter, soft-stop shutdown, and complementary auxiliary driver with programmable deadtime. It offers peak current-mode control with cycle-by-cycle current limiting and TrueDrive outputs providing 2-A sink and 2-A source capabilities.

 

The controller supports a wide range of SMPS power ratings from 150-W to 700-W and is ideal for high-efficiency, low EMI/RFI off-line or DC/DC converters. Applications include server, 48-V telecom, datacom, high power adapters, LCD-TV, and PDP-TV power supplies.

 

This component is available in a 16-TSSOP package and supports surface mount installation. It operates within a voltage range of 8.5V to 16V and has an operating temperature range of -40°C to 85°C (TA).

UCC2891PWR Quick Information

Product Type: PWM Controller
Canonical Name: UCC2891PWR PWM Controller
Subcategory: DC DC Switching Controllers

UCC2891PWR Compliance

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

UCC2891PWR Estimated Pricing

Qty Low High
1+ $1.61 $1.61

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

UCC2891PWR Features

  • Peak current-mode PWM controller.
  • Supports active clamp/reset topologies.
  • Programmable deadtime auxiliary driver.
  • 110-V input startup regulator available.
  • 2-A sink, 2-A source TrueDrive outputs.

UCC2891PWR Applications

  • Ideal for active clamp/reset converters.
  • Suitable for SMPS designs up to 700W.
  • Used in telecom and datacom power.
  • Applicable for high power adapters.
  • Designed for LCD-TV and PDP-TV power.

UCC2891PWR FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating voltage range of the UCC2891PWR?

8.5V to 16V.

What package does the UCC2891PWR come in?

16-TSSOP (0.173", 4.40mm Width) surface mount package.

What is the operating temperature range?

-40°C to 85°C.

What is the switching frequency of the UCC2891PWR?

250 kHz.

What topologies does the UCC2891PWR support?

Flyback and forward converter.

What is the output drive capability?

2A sink and 2A source (TrueDrive outputs).

What control features are included?

Current limit, enable, on time control, ramp, soft start.

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