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UC3841DW The Texas Instruments UC3841DW is a programmable, off-line PWM controller designed for various power converter applications. It operates at up to 500kHz and supports surface mount installation.
Mfr Part #:

UC3841DW

Available from 1 distributors
Mfr Name: Texas Instruments
Texas Instruments
The Texas Instruments UC3841DW is a programmable, off-line PWM controller designed for various power converter applications. It operates at up to 500kHz and supports surface mount installation.
✓ Total Stock: 10,331 pcs
$ Price Range: $0.78

UC3841DW Available from 1 distributor

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✓ Non-Authorised
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Romaks Technologies ✓
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10,331 pcs
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UC3841DW 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
Operating Voltage
Output Configuration
Output Phases
Output Type
SVHC Present
Supplier Device Package
Supplier Package
Synchronous Rectifier
Topology
Voltage
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UC3841DW Description

Short technical summary and product information.

The UC3841DW from Texas Instruments is a versatile PWM controller suitable for off-line and DC-to-DC power converters. It integrates essential control, driving, monitoring, and protection functions, including a low-current start-up circuit and pulse-by-pulse current limiting.

 

This controller supports boost, flyback, and forward converter topologies. It features voltage feed-forward or current mode control, a guaranteed duty cycle clamp, and a PWM latch for single pulse per period. The device operates with an input voltage range of 8V to 32V and a maximum frequency of 500kHz.

 

Designed for efficiency and reliability, the UC3841DW includes protection against over-voltage, under-voltage, and over-current faults, with options for latch-off or automatic restart. It is housed in an 18-SOIC package and is designed for surface mounting.

 

Key features include 1% reference accuracy, slow turn-on for initial start-up and after fault shutdown, and no start-up or shutdown transients. The UC3841DW is characterized for operation from 0°C to 70°C.

UC3841DW Quick Information

Product Type: PWM Controller
Canonical Name: UC3841DW PWM Controller
Subcategory: DC DC Switching Controllers

UC3841DW Compliance

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

UC3841DW Estimated Pricing

Qty Low High
1+ $0.78 $0.78

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

UC3841DW Features

  • Programmable off-line PWM controller.
  • Supports boost, flyback, and forward topologies.
  • Operates at up to 500kHz frequency.
  • Integrated current limit and soft start.
  • Surface mount 18-SOIC package.

UC3841DW Applications

  • Used in off-line power converters.
  • Suitable for DC-to-DC converters.
  • Ideal for boost converter designs.
  • Applicable to flyback converter circuits.
  • Used in forward converter applications.

UC3841DW FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating voltage range of the UC3841DW?

8V to 32V.

What package is the UC3841DW available in?

18-SOIC (0.295 inches, 7.50mm Width) surface-mount package.

What is the operating temperature range of the UC3841DW?

0°C to 70°C ambient.

What switching frequency does the UC3841DW support?

The nominal frequency is 50 kHz, and the maximum frequency is 500 kHz with RT=2kΩ and CT=330pF.

What topologies does the UC3841DW support?

Boost, flyback, and forward converter topologies.

How many outputs does the UC3841DW provide?

One output.

What control features does the UC3841DW include?

Current limit, enable, frequency control, ramp, reset, and soft start.

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