Power Integrations
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TOP252PG
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TOP252PG

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Power Management
  • Characteristics: High Efficiency, Low Standby Power, Wide Input Voltage Range
  • Package: 7-Lead TO-220
  • Essence: Switching Power Supply Controller
  • Packaging/Quantity: Tray, 50 pieces per tray

Specifications

  • Input Voltage Range: 85 VAC to 265 VAC
  • Output Power: Up to 94 W
  • Frequency Range: 50 Hz to 60 Hz
  • Operating Temperature Range: -40°C to +150°C
  • Efficiency: Up to 88%
  • Standby Power: Less than 100 mW

Detailed Pin Configuration

  1. VCC: Power supply input
  2. GND: Ground reference
  3. FB: Feedback pin for voltage regulation
  4. COMP: Compensation pin for loop stability
  5. DRAIN: Switching power MOSFET drain connection
  6. SOURCE: Switching power MOSFET source connection
  7. RT/CT: Timing resistor and capacitor connection for frequency control

Functional Features

  • Integrated high-voltage power switch
  • Frequency jittering for reduced EMI
  • Auto-restart protection for fault conditions
  • Built-in soft-start for controlled startup
  • Over-temperature protection
  • Overload and short-circuit protection

Advantages and Disadvantages

Advantages: - High efficiency leads to energy savings - Wide input voltage range allows for universal use - Compact package size for space-constrained applications - Comprehensive protection features ensure system reliability

Disadvantages: - Requires external components for complete power supply implementation - Limited output power compared to higher-end models

Working Principles

The TOP252PG is a switching power supply controller that regulates the output voltage by controlling the duty cycle of an internal power switch. It operates in a flyback topology, where energy is stored in an inductor during the switch-on time and transferred to the output during the switch-off time. The feedback pin (FB) monitors the output voltage and adjusts the duty cycle accordingly to maintain the desired voltage level.

Detailed Application Field Plans

The TOP252PG is widely used in various applications, including:

  1. Consumer Electronics: Power adapters for laptops, gaming consoles, and set-top boxes.
  2. Industrial Equipment: LED lighting, motor drives, and power supplies for industrial machinery.
  3. Telecommunications: Power supplies for routers, switches, and base stations.
  4. Automotive: DC-DC converters for electric vehicles and automotive infotainment systems.
  5. Renewable Energy: Solar inverters and wind turbine power converters.

Detailed and Complete Alternative Models

  1. TOP253PN: Similar specifications but with a different package (8-Lead PDIP)
  2. TOP254EN: Higher output power capability (up to 150 W)
  3. TOP255GN: Lower standby power consumption (<50 mW)
  4. TOP256EN: Enhanced protection features and wider input voltage range
  5. TOP257YN: Integrated power factor correction (PFC) functionality

(Note: This list is not exhaustive and other alternative models may exist.)

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Énumérez 10 questions et réponses courantes liées à l'application de TOP252PG dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of TOP252PG in technical solutions:

  1. Q: What is TOP252PG? A: TOP252PG is a high-performance integrated circuit (IC) that combines a power switch, controller, and protection features into a single package.

  2. Q: What are the typical applications of TOP252PG? A: TOP252PG is commonly used in offline power supplies for various applications such as TVs, monitors, set-top boxes, and LED lighting.

  3. Q: What is the maximum output power that TOP252PG can handle? A: TOP252PG can handle output power up to 100 watts, making it suitable for a wide range of medium-power applications.

  4. Q: Does TOP252PG require an external MOSFET? A: Yes, TOP252PG requires an external MOSFET to handle the switching of power in the application circuit.

  5. Q: Can TOP252PG operate in continuous or discontinuous conduction mode? A: TOP252PG can operate in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM), depending on the application requirements.

  6. Q: How does TOP252PG provide overvoltage protection? A: TOP252PG incorporates overvoltage protection by monitoring the output voltage and shutting down the power switch if it exceeds a certain threshold.

  7. Q: Is TOP252PG capable of providing short-circuit protection? A: Yes, TOP252PG includes a built-in short-circuit protection feature that limits the current during a short-circuit condition, preventing damage to the circuit.

  8. Q: Can TOP252PG operate with a wide input voltage range? A: Yes, TOP252PG can operate with a wide input voltage range, typically from 85VAC to 265VAC, making it suitable for universal input applications.

  9. Q: Does TOP252PG have thermal protection? A: Yes, TOP252PG incorporates thermal protection that monitors the temperature of the IC and reduces the power output if it exceeds a safe operating limit.

  10. Q: Are there any reference designs available for TOP252PG? A: Yes, Power Integrations, the manufacturer of TOP252PG, provides various reference designs and application notes that can help in implementing the IC in different technical solutions.

Please note that these answers are general and may vary depending on the specific implementation and datasheet of TOP252PG.