TEA1721BT/N1,118

$1.01

Description：IC OFFLINE SWITCH FLYBACK 7SOIC
Series：-
Mfr：NXP USA Inc.
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:2b07ac8b1a41 Category: AC DC Converters, Offline Switchers Brand: NXP USA Inc.

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Product introduction

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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TEA1721BT/N1,118

Overview

The TEA1721BT/N1,118 is an offline switch controller designed for flyback topologies. It integrates a high-voltage startup circuit and a power MOSFET with a 700V breakdown voltage. The device operates within a switching frequency range of 22.5kHz to 50.5kHz and supports a maximum load duty cycle of 78%. It functions with a supply voltage between 8.5V and 35V, starting at 17V. The component provides comprehensive fault protection including overtemperature, overvoltage, and short-circuit safeguards.

Feature Summary

Integrates a high-voltage startup mechanism eliminating external start-up resistors
Includes an internal power MOSFET rated for 700V breakdown voltage
Provides integrated protection against overtemperature, overvoltage, and short-circuit conditions

Applications

Offline AC-DC converters utilizing flyback topology
Low-power consumer appliance power supplies
Battery chargers requiring integrated switching solutions

Procurement Notes

Verify the specific suffix N1,118 matches the required tape and reel packaging configuration. Confirm that the 7-SOIC package dimensions align with the target PCB footprint. Ensure the operating temperature range of -40°C to 150°C meets the thermal requirements of the final application environment before procurement.

Selection Notes

Select this component when designing flyback converters requiring an integrated switch and controller in a compact form factor. The fixed switching frequency range suits applications where EMI filtering constraints are moderate. Consider the 78% maximum duty cycle limit when calculating transformer turns ratios for wide input voltage ranges to ensure stable regulation under all load conditions.

Part Context

This part belongs to the TEA172x GreenChip series from NXP Semiconductors. The series focuses on low-power SMPS controllers with integrated power switches. Variants like the TEA1721AT and TEA1721FT share similar functional blocks but may differ in specific electrical parameters or packaging options within the same family architecture.