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UC3842BD
UC3842BD: 1A Current PWM Switching Controllers operating at 52kHz
UC3842BD
UC3842BD: 1A Current PWM Switching Controllers operating at 52kHz
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UC3842BD DataSheet
Current price plan is under preparation. Please contact our customer service team for the latest pricing information. Thank you for your understanding and support!
Details
Ideal for applications in offline and isolated DC-DC converters, flyback converters, and switch-mode power supplies, the UC3842BD's compact SOIC-14 package enhances its suitability for various industrial and consumer electronic designs. With this IC at the helm, engineers can achieve cost-effective solutions without compromising on performance or functionality
Key Features
- The UC38BD is designed for high-efficiency DC/DC converters with adjustable frequency up to 500 kHz
- It includes internal soft-start, cycle-by-cycle current limiting and over temperature protection
- This controller has undervoltage lockout with hysteresis and a precision reference
Application
- Innovative power solution
- Constant voltage output
- Efficient power conversion
Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
| Product Category ! | Switching Controllers | RoHS | N |
| Topology | Boost, Flyback, Forward | Number of Outputs | 1 Output |
| Switching Frequency ! | 500 kHz | Duty Cycle - Max | 96 % |
| Output Voltage | 4.9 V to 5.1 V | Output Current ! | 1 A |
| Minimum Operating Temperature | 0 C | Maximum Operating Temperature ! | + 70 C |
| Mounting Style | SMD/SMT | Package / Case | SOIC-14 |
| Brand | onsemi | Fall Time | 50 ns |
| Operating Supply Voltage ! | 30 V | Product Type ! | Switching Controllers |
| Rise Time ! | 50 ns | Factory Pack Quantity | 55 |
| Subcategory | PMIC - Power Management ICs | Type | Current Mode PWM Controller |
| Unit Weight | 0.011923 oz |
Datasheet PDF
Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.
FAQs
What is UC3842BD?
The UC3842BD is a fixed frequency current-mode PWM controller integrated circuit designed for use in power supply and power management applications. It is commonly used in offline and DC-DC converter designs.
How Does UC3842BD Work?
The UC3842BD works by regulating the output voltage of power supplies through pulse-width modulation (PWM) control. It operates in a current-mode control architecture, providing excellent line and load regulation. The device features an oscillator, error amplifier, and pulse-width modulator for precise regulation of the power supply output.
How Many Pins does UC3842BD have and What are the Functions of the Pinout Configuration?
The UC3842BD is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package. The pinout configuration includes:
- VCC: Power supply pin for the IC.
- CS: Current sense input for current-mode control.
- RT, CT: External timing components for oscillator frequency setting.
- COMP: Error amplifier output for controlling the duty cycle.
- EA, VC: Error amplifier inputs for voltage loop regulation.
- OUT: Output pin for driving an external power MOSFET.
- GND: Ground pin for the IC.
What are the Pros and Cons of UC3842BD?
Pros:
- Reliable Performance: Provides stable and reliable control of power supply outputs.
- Current-Mode Control: Offers superior line and load regulation in power supply designs.
- Wide Application Range: Suitable for both offline and DC-DC converter applications.
- Efficient Power Management: Enables efficient power conversion and regulation.
- Simple External Circuitry: Requires minimal external components for basic operation.
Cons:
- External Components: May require additional external components for specific power supply designs.
- Noisy Environment: Sensitivity to noise in the system may require additional filtering and shielding.
Are There Any Equivalents/Alternatives to UC3842BD for Recommendation?
- The UC3843 from Texas Instruments is a similar current-mode PWM controller with additional features.
- Alternatives to the UC3842BD include the SG3524 from STMicroelectronics and the TL494 from Texas Instruments.
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