Overview
The TEA1733AT/N1118 is a Switched Mode Power Supply (SMPS) controller IC produced by NXP USA Inc. This component is part of the TEA1733/38 family and is designed for low-cost applications, particularly in flyback topologies. It operates in fixed frequency mode and is optimized for high efficiency and reliability in power supplies up to 75 W. The IC features various protection mechanisms and is suitable for a wide range of input voltages, making it versatile for different power supply designs.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 12 V | - | 30 V | V |
| Supply Current during Start-up and Restart | - | 10 μA | - | μA |
| Supply Current during Normal Operation (without load) | - | 0.55 mA | - | mA |
| Switching Frequency | - | Fixed frequency with jitter | - | - |
| OverTemperature Protection (OTP) | 130 °C | - | 150 °C | °C |
| Maximum Output Voltage on DRIVER Pin | 9 V | - | 12 V | V |
| Package Type | - | SOIC-8 | - | - |
Key Features
- SMPS controller IC enabling low-cost applications in flyback topologies.
- Large input voltage range (12 V to 30 V).
- Very low supply current during start-up and restart (typically 10 μA).
- Low supply current during normal operation (typically 0.55 mA without load).
- Overpower or high/low line compensation.
- Adjustable overpower time-out and restart timer.
- Fixed switching frequency with frequency jitter to reduce EMI.
- Frequency reduction with fixed minimum peak current to maintain high efficiency at low output power levels.
- Slope compensation for Continuous Conduction Mode (CCM) operation.
- Low and adjustable OverCurrent Protection (OCP) trip level.
- Input UnderVoltage Protection (UVP), OverVoltage Protection (OVP), output OVP, and OverTemperature Protection (OTP) with minimal external components).
Applications
The TEA1733AT/N1118 is designed for use in various power supply applications, particularly those requiring high efficiency and reliability. It is suitable for:
- Flyback converters operating in Continuous Conduction Mode (CCM).
- Power supplies up to 75 W).
- Low-cost and compact power supply designs where high efficiency is crucial).
Q & A
- What is the primary function of the TEA1733AT/N1118 IC?
The TEA1733AT/N1118 is a Switched Mode Power Supply (SMPS) controller IC designed for flyback topologies.
- What is the input voltage range of the TEA1733AT/N1118?
The input voltage range is from 12 V to 30 V.
- What is the typical supply current during start-up and restart?
The typical supply current during start-up and restart is 10 μA.
- How does the IC reduce ElectroMagnetic Interference (EMI)?
The IC reduces EMI through fixed switching frequency with frequency jitter.
- What protection mechanisms are integrated into the TEA1733AT/N1118?
The IC includes Input UnderVoltage Protection (UVP), OverVoltage Protection (OVP), output OVP, and OverTemperature Protection (OTP).
- What is the maximum output power supported by the TEA1733AT/N1118?
The IC supports power supplies up to 75 W.
- What is the package type of the TEA1733AT/N1118?
The package type is SOIC-8.
- How does the IC maintain high efficiency at low output power levels?
The IC maintains high efficiency through frequency reduction with a fixed minimum peak current at low output power levels.
- Can the overpower time-out and restart timer be adjusted?
Yes, the overpower time-out and restart timer are adjustable.
- What mode of operation does the TEA1733AT/N1118 support?
The IC supports Continuous Conduction Mode (CCM) operation.
