Overview
The TEA1733LT/N1,118 is a Switched Mode Power Supply (SMPS) controller IC from NXP USA Inc., designed for cost-effective and efficient power supply solutions. This GreenChip™ series IC is optimized for flyback topologies and operates in fixed frequency mode with frequency jitter to reduce ElectroMagnetic Interference (EMI). It is particularly suited for applications requiring high efficiency over a wide load range, up to 75 W.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage Range | 12 | 30 | V | ||
| Start-up Voltage (Vstartup) | 18.6 | 20.6 | 22.6 | V | |
| Undervoltage Lockout Threshold (Vth(UVLO)) | 11.2 | 12.2 | 13.2 | V | |
| Switching Frequency | 66.5 | kHz | |||
| Package Type | SO8 (plastic small outline package; 8 leads; body width 3.9 mm) | ||||
| Supply Current during Start-up and Restart | 10 μA | ||||
| Supply Current during Normal Operation (without load) | 0.5 mA |
Key Features
- SMPS controller IC enabling low-cost applications
- 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 0.5 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
- Adjustable OverCurrent Protection (OCP) trip level
- Adjustable soft start operation
- Two protection inputs (e.g., for input UVP and OVP, OTP and output OVP)
- IC overtemperature protection
Applications
The TEA1733LT/N1,118 is suitable for all applications requiring efficient and cost-effective power supply solutions up to 75 W. This includes a wide range of consumer and industrial electronics that need reliable and efficient power conversion.
Q & A
- What is the primary application of the TEA1733LT/N1,118 IC?
The TEA1733LT/N1,118 is primarily used in Switched Mode Power Supply (SMPS) applications, particularly in flyback topologies, for efficient and cost-effective power supply solutions up to 75 W.
- What is the input voltage range of the TEA1733LT/N1,118?
The input voltage range of the TEA1733LT/N1,118 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.
- What is the switching frequency of the TEA1733LT/N1,118?
The switching frequency is approximately 66.5 kHz.
- Does the TEA1733LT/N1,118 have built-in protection features?
Yes, it includes OverPower Protection (OPP), Input UnderVoltage Protection (UVP), OverVoltage Protection (OVP), output OVP, and OverTemperature Protection (OTP).
- How does the IC manage efficiency at low output power levels?
The IC reduces the switching frequency and sets the primary peak current to 25% of the maximum peak current at low power levels to maintain high efficiency.
- What package type is the TEA1733LT/N1,118 available in?
The IC is available in an SO8 (plastic small outline package; 8 leads; body width 3.9 mm).
- Is the TEA1733LT/N1,118 suitable for automotive applications?
Yes, it is suitable for automotive applications among others.
- Does the TEA1733LT/N1,118 support adjustable soft start operation?
Yes, it supports adjustable soft start operation.
- What is the purpose of the VINSENSE and PROTECT pins?
The VINSENSE and PROTECT pins are reserved for protection purposes, such as input UVP and OVP, OTP, and output OVP.
- Is the TEA1733LT/N1,118 compliant with RoHS regulations?
Yes, the TEA1733LT/N1,118 is RoHS compliant.
