Mfr Part #:

UC3863

The Texas Instruments UC3863 is a resonant-mode PWM controller designed for quasi-resonant converters. It offers features like programmable frequency and fixed off-time control.

✓ Total Stock: 30,133 pcs

$ Price Range: $0.78

UC3863 Available from 1 distributor

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Romaks Technologies ✓ Non-Authorised Inventory information	30,133 pcs On Request	30133 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

UC3863 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%
Frequency	10 kHz - 1 MHz
Operating Temperature	0°C to 70°C

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UC3863 Description

Short technical summary and product information.

The UC3863 from Texas Instruments is a resonant-mode Pulse Width Modulation (PWM) controller optimized for Zero Current Switched (ZCS) and Zero Voltage Switched (ZVS) quasi-resonant converters. This device operates within an 8/7V UVLO range and supports a programmable frequency from 10kHz to 1MHz, with a maximum duty cycle of 50%.

Key features include a precision 5V reference, soft-start capability, and dual 1 Amp peak FET drivers. The UC3863 is designed for off-line or DC/DC applications and controls quasi-resonant converters. It has a typical low start-up current of 150µA, making it suitable for power-sensitive designs.

Packaged in a 16-pin SOIC (DW) with dimensions of 10.3 mm x 10.3 mm, the UC3863 is suitable for surface mounting. It operates within a temperature range of 0°C to 70°C. Note that this part is not recommended for new designs, and users should consider alternate products for new projects.

This controller family offers features such as error amplification, green mode operation, light-load efficiency, multi-topology support, and soft switching, making it versatile for various power supply designs.

UC3863 Quick Information

Product Type: DC DC Switching Controller

Canonical Name: UC3863 Resonant-Mode PWM Controller

Subcategory: DC DC Switching Controllers

UC3863 Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

UC3863 Estimated Pricing

Qty	Low	High
1+	$0.78	$0.78

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

UC3863 Features

Resonant-mode PWM controller for ZCS/ZVS converters.
Programmable frequency from 10kHz to 1MHz.
8/7V UVLO and 50% maximum duty cycle.
Low start-up current of 150µA typical.
Dual 1A peak FET drivers included.

UC3863 Applications

Used in DC-DC switching power supplies.
Supports dual external MOSFET gate control.
Suitable for frequency-programmable converters.
For power management in commercial equipment.

UC3863 FAQs

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

What is the operating temperature range of the UC3863?

0°C to 70°C.

What package is the UC3863 available in?

SOIC (DW) package, 10.3 mm × 10.3 mm.

What is the programmable frequency range of the UC3863?

10 kHz to 1 MHz.

What is the undervoltage lockout threshold?

8/7 V.

What is the start-up current of the UC3863?

150 µA typical.

What is the reference voltage of the UC3863?

5 V.

What FET driver capability does the UC3863 provide?

Dual 1 A peak FET drivers.