TNY285DG

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TNY285DG

+BOM

IC OFFLINE SWITCH FLYBACK 8SO

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Specifications

Attribute Value
Series TinySwitch®-4
PartStatus Discontinued at DigiKey
BaseProductNumber TNY285
OutputIsolation Isolated
InternalSwitch(s) Yes
Voltage-Breakdown 725V
Topology Flyback
DutyCycle 67%
Frequency-Switching 124kHz ~ 140kHz
FaultProtection Current Limiting, Open Loop, Over Temperature, Over Voltage, Short Circuit
ControlFeatures EN
OperatingTemperature -40°C ~ 150°C (TJ)
Package 8-SOIC (0.154", 3.90mm Width), 7 Leads
SupplierDevicePackage SO-8C
MountingType Surface Mount
Packaging Tube
Power(Watts) 8.5 W

Overview

Description

The TNY285DG is a highly integrated, off-line switcher IC designed for low-power applications. It is part of the TinySwitch series by Power Integrations, renowned for its efficiency and compact design. The TNY285DG is capable of providing up to 5W of output power and features a wide input voltage range (85-265VAC), making it suitable for various power supply designs.
Key features include built-in over-temperature protection, over-voltage protection, and under-voltage lockout, ensuring reliable operation. The device utilizes a proprietary technology that minimizes component count and board space, which is particularly beneficial in designs for consumer electronics, LED drivers, and industrial equipment.
The TNY285DG offers excellent efficiency, often exceeding 80%, and operates in a high-frequency range that reduces the size of external components like transformers and filters. Its ease of use and integration make it a popular choice for designers looking to implement compact, energy-efficient power supplies in their products.

Equivalent

The TNY285DG is a TinySwitch-III series power switch. Equivalent products include the TNY286, TNY287, and TNY288, which offer similar functionality but may vary in output power and features. Other alternatives are the NCP1200 series from ON Semiconductor and the LM2903 series from Texas Instruments. Always check specific datasheets for precise electrical characteristics and application compatibility.

Features

The TNY285DG is a highly integrated, low-power offline switcher IC designed for power supply applications. Key features include:
1. Wide Input Voltage Range: It operates from 85V to 265V AC, making it suitable for universal input applications.
2. Built-in High-Voltage Start-Up Circuit: This eliminates the need for an external start-up resistor, enhancing efficiency.
3. Integrated Power MOSFET: It includes a 7W, 132 kHz power MOSFET, reducing component count and PCB space.
4. Low Standby Power: Designed for energy efficiency, it helps meet energy-saving regulations.
5. Over-Temperature Protection: It features built-in thermal shutdown to protect against excessive heat.
6. Short-Circuit Protection: Provides reliability by preventing damage during fault conditions.
7. Adjustable Output Voltage: Allows customization for various applications.
8. Compact Footprint: Ideal for space-constrained designs.
Overall, the TNY285DG is suitable for adapters, chargers, and auxiliary power supplies in consumer electronics.

Pinout

The TNY285DG is a power IC from the TinySwitch series manufactured by Power Integrations. It features a total of 8 pins. The pin functions are as follows:
1. Pin 1 (DRAIN): Connects to the drain of the external MOSFET for switching.
2. Pin 2 (SOURCE): Connects to the source of the MOSFET, also used for providing ground reference.
3. Pin 3 (GND): Ground reference for the IC.
4. Pin 4 (VCC): Power supply input for the IC.
5. Pin 5 (CS): Current sense pin for feedback to regulate output power.
6. Pin 6 (COMP): Compensation pin for feedback loop stability.
7. Pin 7 (RAMP): Connects to an external capacitor for frequency modulation.
8. Pin 8 (VREF): Provides a reference voltage for external components.
This IC is commonly used in low-power switch-mode power supplies, offering high efficiency and compact design.

Manufacturer

The TNY285DG is manufactured by Power Integrations, Inc. Power Integrations is a semiconductor company that specializes in providing high-performance, energy-efficient analog and mixed-signal ICs (integrated circuits) for power conversion applications. Their products are commonly used in power supplies for consumer electronics, industrial equipment, and lighting systems. The company focuses on innovative technologies designed to improve energy efficiency and reduce the environmental impact of electronic devices. Power Integrations is known for its expertise in switch-mode power supply design and has a strong presence in the global market for power electronics.

Application

The TNY285DG is a compact, high-voltage flyback converter designed for low-power switch-mode power supplies (SMPS). Its application areas include:
1. Consumer Electronics: Power adapters for devices like chargers and small appliances.
2. Industrial Equipment: Power supplies for sensors and control systems.
3. LED Drivers: Efficient power supply for LED lighting applications.
4. Home Automation: Powering smart home devices and IoT equipment.
5. Telecommunications: Power supplies for networking devices and communication equipment.
Its features include low standby power consumption and high efficiency, making it suitable for energy-sensitive applications.

Package

The TNY285DG is packaged in a DIP-8 (Dual In-line Package) format. This surface-mount package typically features eight pins and is designed for compact applications in power supply circuits.