| Allicdata Part #: | 596-1605-2-ND |
| Manufacturer Part#: |
TNY285DG-TL |
| Price: | $ 0.34 |
| Product Category: | Integrated Circuits (ICs) |
| Manufacturer: | Power Integrations |
| Short Description: | IC OFF-LINE SWITCH PWM 8SO |
| More Detail: | Converter Offline Flyback Topology 124kHz ~ 140kHz... |
| DataSheet: |  TNY285DG-TL Datasheet/PDF |
| Quantity: | 2500 |
| 1 +: | $ 0.34000 |
| 10 +: | $ 0.32980 |
| 100 +: | $ 0.32300 |
| 1000 +: | $ 0.31620 |
| 10000 +: | $ 0.30600 |
Specifications
| Duty Cycle: | 67% |
| Mounting Type: | Surface Mount |
| Supplier Device Package: | 8-SO |
| Package / Case: | 8-SOIC (0.154", 3.90mm Width), 7 Leads |
| Operating Temperature: | -40°C ~ 150°C (TJ) |
| Control Features: | EN |
| Fault Protection: | Current Limiting, Open Loop, Over Temperature, Over Voltage, Short Circuit |
| Power (Watts): | 8.5W |
| Frequency - Switching: | 124kHz ~ 140kHz |
| Series: | TinySwitch®-4 |
| Voltage - Supply (Vcc/Vdd): | -- |
| Topology: | Flyback |
| Voltage - Breakdown: | 725V |
| Internal Switch(s): | Yes |
| Output Isolation: | Isolated |
| Part Status: | Active |
| Packaging: | Tape & Reel (TR) |
Description
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TNY285DG-TL is a high-efficiency, low-cost, advanced integrated controller for off-line flyback power supplies. It is one of the most commonly used integrated power supply chips by power supply manufactures. It is mainly used in energy-saving power adapters and small power supplies, and is also applied to notebooks, displays and other equipment. This article will introduce its application field and working principle in detail.
Application Field of TNY285DG-TL
TNY285DG-TL belongs to PMIC-AC DC Converters, Offline Switchers. This chip has extremely low BOM cost, high efficiency and high frequency capability, which makes it ideal for most of the off-line flyback power supplies. It is mainly used in LED lighting, mobile charging applications, and electronic appliances. Moreover, even for strict power supplies, this chip can provide high performance at low cost.
TNY285DG-TL has the best cost performance ratio, mainly because it uses an all-CMOS processes, providing fewer discrete components and better stability.
Working Principle of TNY285DG-TL
TNY285DG-TL adopts a one-stage zero-voltage (ZVS) flyback switching architecture. It includes features such as frequency modulator, secondary peak current control, programmable over-voltage protection and frequency-adjusting over temperature protection. The internal high-frequency operating frequency enables the chip to achieve high efficiency even with a small transformer and low-cost components in the BOM.
The working principle of the TNY285DG-TL begins when the switch turns on, the chip pulls the primary current from zero to Ip/N, N is the turns ratio of the transformer. The charge on the transformer increases. When the primary current reaches to Ip/N, the switch turns off and the fly-back process completes. Then current rectifies and charges the output capacitor. The switch turns on again, and the process repeats.
This chip uses an advanced Frequency Modulation Control to optimize over-current protection and reduce losses to maximize efficiency. It also provides an over-voltage protection, an output over-voltage protection, and a frequency-adjusting over temperature protection. The chip operates over a wide output voltages range, from 1.25V to 260V, and it supports an input voltage range from 85V to 305V AC.
In short, TNY285DG-TL is an ideal solution for cost effectiveoff-line flyback power supplies. It offers a low BOM cost, high efficiency, and extremely high reliability. Its application field is wide, covering from LED lighting to mobile recharge and laptop power supplies. In addition, its working principle is very simple and effective, making it one of the best power supply chips on the market today.
The specific data is subject to PDF, and the above content is for reference
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