What is the Additional Feature ?

Name: UC3842BD1R2G
Brand: ON Semiconductor
SKU: UC3842BD1R2G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Any Feature, including a modified Existing Feature, that is not an Existing Feature.

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ON Semiconductor UC3842BD1R2G

Part No.:: UC3842BD1R2G

Manufacturer:: ON Semiconductor

Package:: 8-SOIC (0.154, 3.90mm Width)

Datasheet:: UC3842BD1R2G.pdf

Description:: IC REG CTRLR BST FLYBK ISO 8SOIC

In Stock:: 5534

Quantity:: Add To Cart

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UC3842BD1R2G this integrated circuit is available in factory sealed anti static packs. at icwhale.com. Please read product page below detail information. including UC3842BD1R2G price, data-sheet, in-stock availability, technical difficulties. Also. Quickly Enter the access of compare listing to find out replaceable electronic parts. If you want to retrieve comprehensive data for UC3842BD1R2G to optimize the supply chain (including cross references, life-cycle, parametric, counterfeit risk, obsolescence managements forecasts), please contact to our Tech-supports team.

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UC3842BD1R2G Typical application Circuitry

UC3842BD1R2G

The UC3842BD1R2G is a highly versatile and widely used integrated circuit, primarily designed for switch-mode power supplies (SMPS). This chip finds its applications in various areas due to its efficient control of power supply systems.

Functionality of UC3842BD1R2G

The UC3842BD1R2G functions as a current mode PWM controller. It integrates essential features for SMPS design, such as an oscillator, a PWM controller, a reference voltage source, an error amplifier, and a current sensing comparator. Because of this, it's perfect for creating small, effective power supply.

Application Scenarios of UC3842BD1R2G

- Computer Power Supplies: Used to regulate the voltage and current in computer power units.

- LED Drivers: Efficient in controlling LED lighting systems.

- Battery Chargers: Suitable for precise charging applications.

- DC-DC Converters: Commonly used in converting and controlling DC power levels.

Parameter Features

- Voltage Range: Typically operates within a range of 8.4V to 36V.

- Frequency Range: Adjustable frequency up to 500 kHz.

- Current Limiting: Features an onboard current limit circuit.

Application Example: Flyback Converter Circuit

1. Current Sensing

- Pin 3 (Current Sense): Senses the primary current for protection and control.

- Considerations: Selecting the right sense resistor value is crucial for accurate current sensing.

2.Supply Voltage

- Pin 7 (VCC): Powers the IC.

- Considerations: A stable supply voltage is necessary for consistent IC operation.

3.Oscillator Frequency Setting

- Pin 4 (RT/CT): Determines the oscillator frequency.

- Considerations: The resistor and capacitor values linked to this pin set the switching frequency.

Design Considerations

1. Stability: Ensure the stability of the feedback loop. This can be achieved by proper compensation network design in the feedback path.

2. Thermal Management: The IC can generate heat during operation. Thermal management and enough heat sinking are required.

3. Input Voltage Range: Design the circuit to handle variations in input voltage, ensuring reliable operation under different conditions.

4. Output Regulation: Achieve tight output regulation by correctly setting the feedback loop parameters and selecting appropriate transformer turns ratio.

5. Protection Features: Implement overvoltage, overcurrent, and thermal protection to safeguard the circuit from abnormal conditions.

6. Noise Reduction: Minimize electromagnetic interference (EMI) and switching noise through careful layout and filtering.

Conclusion

The UC3842BD1R2G is a powerful tool for designing efficient and reliable switch-mode power supplies. It is a well-liked option for designers due to its extensive feature set and adaptability in a range of applications. When designing a circuit with this IC, attention to detail in aspects like feedback loop stability, thermal management, and protection features is paramount to achieve optimal performance.

UC3842BD1R2G information

UC3842BD1R2G Specifications

Package/Case:
8-SOIC (0.154, 3.90mm Width)
Packaging:
Tape & Reel (TR),Cut Tape (CT),Digi-Reel®
Series:
-
ProductStatus:
Active
OutputType:
Transistor Driver
Function:
Step-Up, Step-Up/Step-Down
OutputConfiguration:
Positive, Isolation Capable
Topology:
Boost, Flyback
NumberofOutputs:
1
OutputPhases:
1
Voltage-Supply(Vcc/Vdd):
10V ~ 30V
Frequency-Switching:
Up to 500kHz
DutyCycle(Max):
96%
SynchronousRectifier:
No
ClockSync:
No
SerialInterfaces:
-
ControlFeatures:
Frequency Control
OperatingTemperature:
0°C ~ 70°C (TA)
MountingType:
Surface Mount

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6. What is the process for return or replacement of UC3842BD1R2G?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the UC3842BD1R2G we delivered, we will accept the replacement or return of the UC3842BD1R2G only when all of the below conditions are fulfilled:

(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of UC3842BD1R2G.

(3)The PartNo is unused and only in the original unpacked packaging.

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(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations