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Product Detailed Parameters
- Description：IC OFFLINE SWITCH FLYBACK 7SOIC
- Series：-
- Mfr：NXP USA Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Isolation：-
- Internal Switch(s)：Yes
- Voltage - Breakdown：700V
- Topology：Flyback
- Voltage - Start Up：17 V
- Voltage - Supply (Vcc/Vdd)：8.5V ~ 35V
- Duty Cycle：75%
- Frequency - Switching：22.5kHz ~ 50.5kHz
- Fault Protection：Over Temperature, Over Voltage, Short Circuit
- Control Features：-
- Operating Temperature：-40°C ~ 150°C (TJ)
- Package / Case：8-SOIC (0.154", 3.90mm Width), 7 Leads
- Supplier Device Package：7-SOIC
- Mounting Type：Surface Mount
- Grade：-
- Qualification：-
- Power (Watts)：5 W
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Overview
The TEA1721AT/N1,118 is an AC-DC controller with an integrated power switch designed for flyback topologies. It operates within a switching frequency range of 22.5 kHz to 50.5 kHz and supports a maximum duty cycle of 78%. The device features a 700V breakdown voltage and requires a startup voltage of 17 V, with a supply voltage range of 8.5 V to 35 V. It is housed in a 7-SOIC package and functions reliably across temperatures from -40°C to +85°C, with junction temperatures reaching 150°C.
Feature Summary
- Integrates a high-voltage MOSFET to reduce component count
- Features high-voltage start-up capability for simplified design
- Includes protection against overtemperature, overvoltage, and short circuits
Applications
- Offline flyback converters
- Low-power AC-DC power supplies
- Consumer electronics adapters
Procurement Notes
Verify the specific suffix N1,118 to confirm packaging and reel specifications. Ensure compatibility with RoHS3 standards as indicated in official documentation. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components. Confirm that the 7-SOIC footprint matches your PCB layout requirements before finalizing orders.
Selection Notes
Select this component for applications requiring a highly integrated solution with an internal power switch. It is suitable for designs targeting low power consumption and reduced bill of materials. Consider the 700V rating for appropriate voltage stress margins. Evaluate the fixed burst frequency characteristics against efficiency requirements for light-load conditions.
Part Context
This part belongs to the TEA172x GreenChip series, which focuses on low-power SMPS controllers. These devices are engineered to minimize standby power consumption while maintaining high efficiency. The series integrates advanced control modes to support cost-effective designs for various consumer and industrial power adapter applications.
Replacement Considerations
Consult official substitution lists for compatible variants within the TEA172x family. Verify pinout and electrical parameter alignment before replacing existing inventory.
