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UC3844D8

The Texas Instruments UC3844D8 is a single-ended, current-mode PWM controller operating up to 500kHz. It features undervoltage lockout and a 50% duty cycle.

✓ Total Stock: 4,260 pcs

$ Price Range: $0.68

UC3844D8 Available from 2 distributors

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Braun Electronic Components ✓ Non-Authorised Inventory information	2,130 pcs On Request	2130 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request
MW.FEP S.p.A. ✓ Non-Authorised Inventory information	2,130 pcs On Request	2130 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

UC3844D8 Specifications Quick View

Most important parameters for selection – full specs in datasheet.

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Category	New Products
Manufacturer Name	Texas Instruments
Duty Cycle	50%
Package Quantity	75

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UC3844D8 Description

Short technical summary and product information.

The UC3844D8 from Texas Instruments is a current-mode Pulse Width Modulation (PWM) controller designed for off-line and DC-to-DC converters. It operates at frequencies up to 500kHz and features a 50% maximum duty cycle.

Key electrical characteristics include a low start-up current of less than 1mA and undervoltage lockout (UVLO) with hysteresis, typically engaging at 10V and releasing at 16V. The device also incorporates pulse-by-pulse current limiting and double-pulse suppression for enhanced protection.

This controller is housed in an 8-pin SOIC package and operates within a temperature range of 0°C to 70°C. It is suitable for applications requiring efficient power conversion with a minimum number of external components.

UC3844D8 Quick Information

Product Type: PWM Controller

Series: UC3844

Canonical Name: UC3844D8 Current Mode PWM Controller

Subcategory: AC/DC Controllers

UC3844D8 Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

UC3844D8 Estimated Pricing

Qty	Low	High
1+	$0.68	$0.68

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

UC3844D8 Features

Operates up to 500kHz frequency.
Features 16V/10V undervoltage lockout.
Supports 50% maximum duty cycle.
Low start-up current below 1mA.
Packaged in an 8-pin SOIC.

UC3844D8 Applications

Optimized for off-line converters.
Suitable for DC-to-DC converters.
Used in fixed-frequency control schemes.

UC3844D8 FAQs

6 frequently asked questions generated from this part’s specifications.

What is the operating frequency of the UC3844D8?

The UC3844D8 operates up to 500kHz.

What are the undervoltage lockout (UVLO) levels for the UC3844D8?

The UVLO levels are 16V maximum and 10V minimum.

What is the maximum duty cycle for the UC3844D8?

The maximum duty cycle is 50%.

What is the start-up current for the UC3844D8?

The start-up current is less than 1mA.

What is the operating temperature range of the UC3844D8?

The operating temperature range is 0°C to 70°C.

What package type is the UC3844D8 available in?

The UC3844D8 is available in an 8-pin SOIC package.

UC3844D8 Alternate Parts

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UCC2813D5

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The Texas Instruments UCC2813D-5 is a low-power, current-mode PWM controller designed for DC-to-DC switching power supplies. It operates up to 1 MHz and features a 1A totem-pole output.

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