UC3844DX [Onsemi]

Name: UC3844DX
Brand: Onsemi
SKU: UC3844DX
Availability: InStock

Part No:

UC3844DX

Category:

Interface ICs

Manufacturer:

Onsemi

Description:

The UC3842/UC3843/UC3844/UC3845 are fixed frequency current-mode PWM controller. They are specially designed for Off-Line and DC to DC converter applications with minimum external components.

Stock Status:

Available for RFQ

Pricing:

Request Volume Pricing

Quote Response:

Within 24 Hours

Shipping:

In-stock parts ship in 1–2 business days

Specification

Type

Parameter

Output Current

±1A

Supply Voltage

30V

Storage Temperature

-65°C ~ +150°C

Analog Inputs Max

6.3V

Analog Inputs Min

-0.3V

Error Amp Output Sink Current

10mA

Lead Temperature

+300°C

Max Duty Cycle Uc3842 Uc3843

97%

Max Duty Cycle Uc3844 Uc3845

48%

Min Operating Voltage Uc3842 Uc3844

10.0V

Min Operating Voltage Uc3843 Uc3845

7.6V

Operating Supply Current

14mA

Oscillation Frequency

52kHz

Power Dissipation 14sop

680mW

Power Dissipation 8dip

1200mW

Power Dissipation 8sop

460mW

Reference Output Voltage

5.00V

Start Threshold Uc3842 Uc3844

16.0V

Start Threshold Uc3843 Uc3845

8.4V

Start Up Current

0.45mA

Thermal Resistance Junction Ambient 14sop

180°C/W

Thermal Resistance Junction Ambient 8dip

100°C/W

Thermal Resistance Junction Ambient 8sop

265°C/W

Zener Voltage

38V

Products Detail

These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator and a high current totem pole output for driving a Power MOSFET. The UC3842 and UC3844 have UVLO thresholds of 16V (on) and 10V (off). The UC3843 and UC3845 are 8.5V(on) and 7.9V (off). The UC3842 and UC3843 can operate within 100% duty cycle. The UC3844 and UC3845 can operate with 50% duty cycle.

Key Features

Low Start up Current, Maximum Duty Clamp, UVLO With Hysteresis, Operating Frequency up to 500KHz, Trimmed oscillator, Temperature compensated reference, High gain error amplifier, Current sensing comparator, High current totem pole output

Application scenarios

Off-Line converter
DC to DC converter

Product FAQ

1. Is UC3844DX available for RFQ?

Yes. UC3844DX by Onsemi is available for RFQ. Submit your required quantity and our team will confirm real-time stock, lead time, and volume pricing.

2. Why is there no fixed price for UC3844DX?

Pricing for UC3844DX can vary by order quantity, market availability, date code, packaging, and delivery destination. Request a quote to receive the latest volume pricing.

3. What are the key specifications of UC3844DX?

UC3844DX is a Onsemi Interface ICs with Thermal Resistance Junction Ambient 14sop: 180°C/W and Thermal Resistance Junction Ambient 8dip: 100°C/W. Review the product details or submit an RFQ if you need confirmation before purchase.

4. How fast can I get a quote for UC3844DX?

Our sales team usually responds within 24 hours after receiving your RFQ. The quote may include stock status, unit price, lead time, shipping options, and available alternatives.

5. How soon can UC3844DX be shipped?

If stock is confirmed, in-stock parts can usually ship within 1–2 business days. Final lead time depends on quantity, stock source, and delivery destination.

6. Can you suggest alternatives to UC3844DX?

Yes. If UC3844DX is unavailable, obsolete, or does not meet your required lead time, we can help check similar Onsemi Interface ICs parts or compatible alternatives.

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