TNY285DG

Product Overview

Category

TNY285DG belongs to the category of integrated circuits (ICs), specifically power management ICs.

Use

This IC is primarily used for power supply applications, providing efficient and reliable power management solutions.

Characteristics

• High efficiency: TNY285DG offers excellent power conversion efficiency, reducing energy wastage.
• Compact size: The IC is designed to be compact, making it suitable for space-constrained applications.
• Low standby power consumption: It minimizes power consumption during idle or standby modes.
• Wide input voltage range: TNY285DG can handle a wide range of input voltages, enhancing its versatility.
• Over-temperature protection: The IC incorporates built-in protection mechanisms to prevent overheating.

Package

TNY285DG is available in a small outline package (SOP) with a specified pin configuration. The package ensures easy integration into various electronic systems.

Essence

The essence of TNY285DG lies in its ability to efficiently regulate and manage power supply, ensuring stable and reliable operation of electronic devices.

Packaging/Quantity

The IC is typically sold in reels or tubes, containing a specific quantity per package. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Input voltage range: 85V - 265V AC
• Output voltage: Adjustable, typically 5V DC
• Maximum output current: 1A
• Operating temperature range: -40°C to +125°C
• Package type: SOP-7

Detailed Pin Configuration

TNY285DG features a total of seven pins, each serving a specific function:

1. VDD: Power supply input pin.
2. BP/M: Bootstrap capacitor connection pin.
3. FB: Feedback pin for regulating the output voltage.
4. GND: Ground reference pin.
5. DRAIN: High-voltage power switch drain pin.
6. SOURCE: High-voltage power switch source pin.
7. SYNC/SD: Synchronization or shutdown control pin.

Functional Features

• Primary-side regulation (PSR): TNY285DG utilizes PSR technology, eliminating the need for an optocoupler and secondary-side feedback components.
• Frequency jittering: The IC employs frequency jittering to reduce electromagnetic interference (EMI) emissions, ensuring compliance with regulatory standards.
• Auto-restart protection: It includes auto-restart functionality to enhance system reliability by automatically recovering from fault conditions.

Advantages and Disadvantages

Advantages

• High efficiency leads to energy savings.
• Compact size allows for flexible integration.
• Wide input voltage range enhances versatility.
• Over-temperature protection ensures safe operation.
• Primary-side regulation simplifies circuit design.

Disadvantages

• Limited maximum output current may not be suitable for high-power applications.
• Requires careful consideration of thermal management due to operating temperature limitations.

Working Principles

TNY285DG operates on the principle of primary-side regulation, where the feedback loop is closed on the primary side of the power supply. This approach eliminates the need for a separate feedback path and optocoupler, reducing component count and cost. The IC uses a combination of switching and control techniques to regulate the output voltage and maintain stable power delivery.

Detailed Application Field Plans

TNY285DG finds application in various fields, including but not limited to: - Consumer electronics: Power supplies for televisions, set-top boxes, and audio systems. - Lighting: LED drivers and lighting fixtures. - Industrial equipment: Power management for industrial automation systems. - Home appliances: Power supplies for refrigerators, washing machines, and air conditioners.

Detailed and Complete Alternative Models

• TNY284DG: Similar to TNY285DG, but with a lower maximum output current of 0.5A.
• TNY286DG: Similar to TNY285DG, but with a higher maximum output current of 1.5A.

These alternative models offer similar functionality and characteristics, with slight variations in output current capacity.

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