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TOP221PN
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TOP221PN

Product Overview

  • Category: Integrated Circuit
  • Use: Power Management
  • Characteristics: High Efficiency, Low Standby Power, Overload Protection
  • Package: DIP-7 (Dual In-line Package)
  • Essence: Offline Switcher
  • Packaging/Quantity: Tube/50 pieces per tube

Specifications

  • Input Voltage Range: 85VAC to 265VAC
  • Output Power: Up to 25W
  • Switching Frequency: 132kHz
  • Operating Temperature Range: -40°C to +125°C
  • Standby Power Consumption: Less than 100mW

Detailed Pin Configuration

  1. VCC: Supply voltage for internal control circuitry
  2. GND: Ground reference
  3. FB: Feedback pin for output voltage regulation
  4. DRAIN: High-voltage power MOSFET drain connection
  5. SOURCE: High-voltage power MOSFET source connection
  6. COMP: Compensation pin for loop stability
  7. CT: Timing capacitor connection for switching frequency control

Functional Features

  • Integrated high-voltage power MOSFET
  • Auto-restart protection for overvoltage and overcurrent conditions
  • Frequency jittering for reduced EMI emissions
  • Built-in soft-start for controlled startup
  • Cycle-by-cycle current limit for overload protection

Advantages

  • High efficiency, reducing power consumption
  • Low standby power, saving energy
  • Compact package size, suitable for space-constrained applications
  • Robust protection features ensure reliable operation
  • Wide input voltage range for versatile use

Disadvantages

  • Limited output power capability (up to 25W)
  • Requires external components for proper operation
  • Not suitable for high-power applications

Working Principles

The TOP221PN is an offline switcher that operates by converting high-voltage AC input into a regulated DC output. It utilizes a high-voltage power MOSFET to switch the input voltage at a high frequency, typically 132kHz. The integrated control circuitry ensures efficient power transfer and provides various protection features.

During operation, the feedback pin (FB) monitors the output voltage and adjusts the duty cycle of the switching waveform to maintain a stable output. The compensation pin (COMP) allows for loop stability adjustment, ensuring proper regulation. The timing capacitor (CT) controls the switching frequency, which can be set externally.

Detailed Application Field Plans

The TOP221PN is commonly used in various power management applications, including:

  1. Power adapters for consumer electronics
  2. LED lighting systems
  3. Industrial power supplies
  4. Home appliances
  5. Battery chargers

Its compact package size and wide input voltage range make it suitable for both low-power and medium-power applications.

Detailed and Complete Alternative Models

  1. TOP222PN: Similar specifications and features, but with higher output power capability (up to 40W).
  2. TOP223PN: Similar specifications and features, but with lower standby power consumption.
  3. TOP224PN: Similar specifications and features, but with additional protection features like thermal shutdown.

These alternative models provide options for different power requirements and specific application needs.

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Sebutkan 10 pertanyaan dan jawaban umum terkait penerapan TOP221PN dalam solusi teknis

Sure! Here are 10 common questions and answers related to the application of TOP221PN in technical solutions:

  1. Q: What is TOP221PN? A: TOP221PN is a high-performance integrated circuit (IC) that is commonly used in power supply applications.

  2. Q: What are the main features of TOP221PN? A: The main features of TOP221PN include high efficiency, low standby power consumption, built-in protection features, and wide input voltage range.

  3. Q: What is the typical application of TOP221PN? A: TOP221PN is typically used in offline power supplies, such as AC-DC converters, battery chargers, LED drivers, and other similar applications.

  4. Q: How does TOP221PN achieve high efficiency? A: TOP221PN achieves high efficiency through its advanced control algorithms, which optimize power transfer and minimize losses.

  5. Q: What are the built-in protection features of TOP221PN? A: TOP221PN includes features like overvoltage protection, overcurrent protection, thermal shutdown, and short-circuit protection to ensure safe operation.

  6. Q: Can TOP221PN operate with a wide range of input voltages? A: Yes, TOP221PN has a wide input voltage range, typically from 85V to 265V AC, making it suitable for various power supply applications.

  7. Q: Is TOP221PN easy to use? A: Yes, TOP221PN is designed to be user-friendly with its simplified pin configuration and integrated functions, making it relatively easy to implement in technical solutions.

  8. Q: Can TOP221PN be used in both low-power and high-power applications? A: Yes, TOP221PN can be used in a wide range of power applications, from low-power devices to high-power systems, depending on the specific design requirements.

  9. Q: Are there any application notes or reference designs available for TOP221PN? A: Yes, the manufacturer of TOP221PN provides application notes and reference designs that can help engineers in implementing the IC effectively in their technical solutions.

  10. Q: Where can I purchase TOP221PN? A: TOP221PN can be purchased from various electronic component distributors, both online and offline. It is advisable to check with authorized distributors or the manufacturer's website for reliable sources.

Please note that the answers provided here are general and may vary based on specific technical requirements and design considerations.