Overview
The TEA1731TS/1H is a Switched Mode Power Supply (SMPS) controller IC developed by NXP USA Inc., part of the GreenChip™ series. This IC is designed for low-cost, highly efficient, and reliable power supply applications, particularly in flyback topologies. It operates in peak current and frequency control mode, incorporating features such as frequency jitter to reduce Electromagnetic Interference (EMI) and slope compensation for Continuous Conduction Mode (CCM) operation. The TEA1731TS/1H is suitable for power requirements up to 75 W and is characterized by its large input voltage range and various protection mechanisms.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer Part Number | TEA1731TS/1H | |
| Manufacturer | NXP Semiconductors / Freescale | |
| Description | IC SMPS CONTROLLER 6TSOP | |
| Voltage - Supply (Vcc/Vdd) | 12 V ~ 30 V | V |
| Voltage - Start Up | 21.5 V | V |
| Topology | Flyback | |
| Power (Watts) | 75 W | W |
| Package / Case | SC-74, SOT-457 (6-TSOP) | |
| Output Isolation | Isolated | |
| Internal Switch(s) | No | |
| Frequency - Switching | 65 kHz | kHz |
| Fault Protection | Current Limiting, Over Power, Over Temperature, Over Voltage | |
| Duty Cycle | 80% | % |
| Operating Temperature | -40°C ~ 150°C (TJ) | °C |
| Mounting Type | Surface Mount |
Key Features
- SMPS controller IC enabling low-cost applications
- Large input voltage range (12 V to 30 V)
- Integrated OverVoltage Protection (OVP) on VCC
- Very low supply current during start-up and restart (10 μA typical)
- Low supply current during normal operation (0.58 mA typical without load)
- Internal overpower time-out
- Overpower or high/low line compensation
- Fixed switching frequency with frequency jitter to reduce EMI
- Frequency reduction at medium power operation to maintain high efficiency
- Frequency reduction with fixed minimum peak current to maintain high efficiency at low output power levels
- Frequency increase at peak power operation
- Slope compensation for CCM operation
- Adjustable soft start
- Low and adjustable OverCurrent Protection (OCP) trip level
Applications
The TEA1731TS/1H is designed for use in flyback converters operating in continuous conduction mode. It is suitable for a variety of applications requiring efficient and reliable power supply solutions, such as:
- Offline power supplies
- Consumer electronics
- Industrial power supplies
- Telecommunication equipment
- Other applications requiring up to 75 W of power
The IC can be used in configurations that include an auxiliary winding for powering the IC during normal operation, and it requires a minimal number of external components to implement a complete power supply solution.
Q & A
- What is the primary function of the TEA1731TS/1H IC?
The TEA1731TS/1H is a Switched Mode Power Supply (SMPS) controller IC designed for flyback topologies.
- What is the input voltage range of the TEA1731TS/1H?
The input voltage range is from 12 V to 30 V.
- What type of topology does the TEA1731TS/1H support?
The TEA1731TS/1H supports flyback topology.
- What is the maximum power output of the TEA1731TS/1H?
The maximum power output is 75 W.
- What are the key protection features of the TEA1731TS/1H?
The IC features current limiting, over power protection, over temperature protection, and over voltage protection.
- What is the switching frequency of the TEA1731TS/1H?
The switching frequency is 65 kHz.
- How does the TEA1731TS/1H reduce Electromagnetic Interference (EMI)?
The IC reduces EMI through frequency jitter.
- What is the operating temperature range of the TEA1731TS/1H?
The operating temperature range is from -40°C to 150°C (TJ).
- What type of package does the TEA1731TS/1H come in?
The IC comes in a 6-TSOP (SC-74, SOT-457) package.
- Is the TEA1731TS/1H RoHS compliant?
Yes, the TEA1731TS/1H is lead-free and RoHS compliant.
