Overview
The TEA1721BT/N1,118 is a Switched Mode Power Supply (SMPS) controller IC designed by NXP USA Inc. This component is optimized for low-power applications, specifically up to 5 watts, and is ideal for use in flyback converter topologies. It integrates a high-voltage power switch, allowing it to operate directly from the rectified universal mains input without the need for external bleeder circuits. The TEA1721BT/N1,118 is known for its high efficiency, ultra-low power consumption in no-load conditions, and minimal external component requirements, making it a cost-effective solution for various power supply designs.
Key Specifications
| Parameter | Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| Tamb (ambient temperature) | -40 | +85 | °C | ||
| Tj (junction temperature) | -40 | +150 | °C | ||
| Tstg (storage temperature) | -55 | +150 | °C | ||
| VDRAIN (voltage on pin DRAIN) | -2 | +700 | V | ||
| VSOURCE (voltage on pin SOURCE) | -0.3 | +5 | V | ||
| VCC (voltage on pin VCC) | -0.3 | +35 | V | ||
| IDRAIN (current on pin DRAIN) | VDRAIN = 325 V | -0.1 | +0.7 | A | |
| RDSon (drain-source on-state resistance) | Tj = 25 °C; Ids = 30 mA | 13 | 15.5 | 17 | Ω |
| V(BR)DS (drain-source breakdown voltage) | 700 | V |
Key Features
- Low power SMPS controller with integrated 700 V high voltage power switch for global mains operation.
- Primary sensing for control of the output voltage without optocoupler and secondary feedback circuitry.
- Minimizes audible noise in all operation modes through burst mode control at low power levels and no-load conditions.
- Compliant with USB battery charging and Energy Star 2.0 standards.
- Jitter function for reduced EMI.
- Burst mode frequency of 905 Hz enabling no-load power consumption below 20 mW at high mains input.
Applications
The TEA1721BT/N1,118 is suitable for a variety of low-power applications, including but not limited to:
- Small power adapters and chargers.
- Low-power consumer electronics.
- Energy-efficient lighting solutions.
- USB-powered devices.
- Other low-power SMPS designs where high efficiency and minimal component count are crucial.
Q & A
- What is the maximum power rating of the TEA1721BT/N1,118? The TEA1721BT/N1,118 is designed for applications up to 5 watts.
- What is the voltage rating of the integrated power switch? The integrated power switch has a voltage rating of 700 V.
- Does the TEA1721BT/N1,118 require an optocoupler and secondary feedback circuitry? No, it uses primary sensing to control the output voltage, eliminating the need for these components.
- How does the TEA1721BT/N1,118 minimize audible noise? It operates in burst mode at low power levels and no-load conditions to minimize audible noise.
- Is the TEA1721BT/N1,118 compliant with any energy efficiency standards? Yes, it is compliant with USB battery charging and Energy Star 2.0 standards.
- What is the burst mode frequency of the TEA1721BT/N1,118? The burst mode frequency is 905 Hz.
- What is the typical no-load power consumption of the TEA1721BT/N1,118? The no-load power consumption is below 20 mW at high mains input.
- What package type is the TEA1721BT/N1,118 available in? It is available in a 7-SOIC package.
- What are the operating temperature ranges for the TEA1721BT/N1,118? The ambient temperature range is -40°C to +85°C, and the junction temperature range is -40°C to +150°C.
- Is the TEA1721BT/N1,118 suitable for global mains operation? Yes, it is designed for global mains operation due to its 700 V high voltage power switch.
